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TA8748AN
DOUBLE CCD COMB IC FOR TV, VTR
TOSHIBA
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8748AN
DOUBLE CCD COMB IC FOR TV, VTR
The TA8748AN is for double comb filter Y/C separation
and vertical edge enhancement using the logic of
majority decision.
Due to this logic, the Y/C Separation by this IC have no
dot appearance or color protruding.
FEATURES
3 Line Comb Filter Operation
Center Value Detecting Circuit
Vertical Edge Sharpness Correction (Vertical Secondary
Differential)
Vertical Edge Sharpness Correction Level Control
Edge Sharpness Correction Signal Caring and Peak Clip
TA8748AN
SDIP30-P-400-1.78
Weight : 1.999 (Typ.)
TOSHIBA
BLOCK DIAGRAM
Sync. sep.
1 V1 H Output /]
VD Output
TA8748AN
"-e Comb - " V2H 28 + -
2.4 it J o (li?, adj H” OH
--(i. :11H Del 'tr''
Cts? Output l Cl VOH (ii) I
n c Output LA 0H Output Ch
'C., - ?3'
--ov,-) tr?, GND D-t
Output ICT, 3 f
Ci) N.C. - 8> t; sc F D-a.
(i, fsc C g fsc F Output Ci))
f (,-o-, ir?,
(f? scB cm“) combswas,
w Ls: d'' c, a
Ci fscA )1 l a <| fsc OH Ci) I
T (i.)?, fsc A Output <1 fsc 1H 38)- l
T Ci fsc B Output f 2H Ci?,
T Ci fsc c Output Bias Cisy-o-t
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Power Supply Voltage VCC 12 V
Power Dissipation PD max 1560 (Note 1) mW
Input Terminal Signal Voltage ein 5 Vp-p
Operating Temperature Topr - 20~65 "C
Storage Temperature Tstg - 55--150 "C
(Note 1)
12.5mW for each increase of 1°C.
(Note 2)
Please handle with care.
When using the device at above Ta=25°C, decrease the power dissipation by
These devices are easy to be damaged by static voltage or electric fields.
TOSHIBA TA8748AN
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, VCC =9V, Ta = 25°C)
DC voltage characteristics
PIN No. PIN NAME SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
1 VIH Output VI - 4.2 4.5 4.8 v
2 VD Output v2 cf. OPEN 4.2 4.5 4.8 v
3 VD Input v3 - 2.7 3.0 3.3 v
4 Comb adj v4 cf. OPEN 4.2 4.5 4.8 v
5 VIH Del v5 - 2.7 3.0 3.3 v
6 Y1 Output v5 - 2.3 3.0 3.5 v
7 C Output V7 - 3.5 3.8 4.1 V
8 Y2 Output v8 - 2.3 3.0 3.5 v
9 N.C. v9 - - - - v
10 fsc c v10 - 4.2 4.5 4.8 v
11 fsc B V11 - 4.2 4.5 4.8 v
12 fsc A v12 - 4.2 4.5 4.8 v
13 fsc A Output v13 - 3.5 3.8 4.1 v
14 fsc B Output v14 - 3.5 3.8 4.1 v
15 fsc c Output v15 - 3.5 3.8 4.1 v
16 Bias v16 - 5.7 6.1 6.3 v
17 fsc 2H V17 - 5.0 5.4 5.6 V
18 fsc 1H V18 - 5.0 5.4 5.6 v
19 fsc 0H V19 - 5.0 5.4 5.6 V
20 Comb sw v20 cf. OPEN 0 0.03 0.5 v
21 fsc F Output v21 - 2.8 3.1 3.4 v
22 fsc F v22 - 4.2 4.5 4.8 v
23 GND - - - 0 - v
24 OH Output v24 - 4.2 4.5 4.8 v
25 VOH V25 - 5.0 5.3 5.5 V
26 VH v26 - 5.0 5.3 5.5 v
27 V1H V27 - 5.0 5.3 5.5 V
28 v2... v28 - 5.0 5.3 5.5 v
29 Vcc - - - 9.0 - v
30 VD Output v30 - 4.2 4.5 4.8 v
29 Vcc 129 - 43 54 72 mA
3 2001-06-25
TOSHIBA TA8748AN
AC characteristics
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
(1) 0H-9A Gca 17.5 19 20
19dB Amp Gain (2) IH-aB Gcb - (Note 1) 17.5 19 20 dB
(3) 2H-9C Gcc 17.5 19 20
(1) 0H-9A fa IO - -
2ed2'icl""""""y (2) IH-OB fb - (Note 2) IO - - MHz
(3) 2H-9C fc IO - -
mm A I t (1) OH-oA via 500 600 -
D :,'l'dl'c'",'d2': (2) IH-aB vib - (Note 3) 500 600 - ml/p-p
y g (3) 2H-9C Vic 500 600 -
Center Value Circuit Gain Gcout - (Note 4) -8.0 -6.5 -5.0 dB
Center Value Circuit Frequency
- N t 5 10 - - MHz
Characteristics fcout ( o e )
(1) out fsc F Vit 4.5 - -
Offset Leak Level - (Note 6) V -
(2) Cout Vioc 4.5 - - p p
Center Value Circuit fsc A Vofa - - 70
Input Dynamic Range fsc B Vofb - (Note 7) - - 70 mi/p-p
f V - - 70
Center Value Circuit sc f, V°fc 50
t f Leak Le el SC oca - -
ou sc F V fsc c Vocc - (Note 8) - - 50 ml/p-p
Center Value Circuit fsc F Voci - - 35
Cout Leak Level Crosstalk Voyc - (Note 9) - - 50 ml/p-p
. 1) out 0H Cohc -45 - -
Chroma-av)
3) VD out Cvdc -50 - -
Comb SW Switching Voltage VSW - (Note 11) 2.7 3.6 4.0 V
Positive Gm -2.5 -0.5 0.5
. . - N t 12 dB
cad] Amp Max. Gain Negative Gc1r ( o e ) -2.5 -0.5 0.5
Positive Gc2f - 7.5 - 6.5 - 5.5
. . - N 13 dB
Cadj Amp Center Gain Negative Gc2r ( ote ) -7.5 -6.5 -5.5
Positive Gc3f - - 50
. . . - N t 14 dB
Cadj Amp Min. Gain Negative Gc3r ( o e ) - - 50
Cadj Amp Frequency Positive fc1f - (Note 15) 10 - - MHz
Characteristics Negative fc1r IO - -
Cadj Amp Input Positive VC1f - (Note 16) 4.5 - - dB
Dynamic Range Negative Vc1r 4.5 - -
4 2001-06-25
TOSHIBA TA8748AN
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
. out 0H Gv00 - 5.0 6.0 7.0
VOH Input Gain VD out 6de (Note 17) - 1.0 0.0 1.0 dB
VH Input Gain V1H out Gv1h - (Note 18) 9.0 10.0 11.5 dB
. V1H out Gv11 9.0 10.0 11.5
V1H Input Gain VD out Gvd1 - (Note 19) 5.0 6.0 7.0 dB
V2H Input Gain VD out Gvd2 - (Note 20) -7.5 -6.0 -5.5 dB
VOH Input: frequenCy out 0H fvoo - (Note 21) 10 - - MHz
Characteristics VD out fud0 10 - -
VH Input Frequency
v f - N 22 1 - - MH
Characteristics 1H out v1h ( ote ) 0 z
V1H Input Frequency V1H out fv11 - 10 - -
Characteristics VD out fvd1 (Note 23) 10 - - MHz
V2H Input Frequency VD out fud2 - (Note 24) 10 - - MHz
VOH Input Dynamic out 0H ViOO - 1.5 - -
Range VD out VidO (Note 25) 1.5 - - Vp-p
VH Input Dynamic
V V; - N 2 . - - V -
Range Characteristics 1H out ilh ( ote 6) 0 9 p p
V1H Input Dynamic V1H out Vi11 - 1.0 - -
Range VD out vid1 (Note 27) 1.0 - - Vp-p
V Input Dynamic .
R§:ge VD out Vid2 - (Note 28) 2.5 - - Vp-p
Coring Peak Clip Level Vpcl - (Note 29) 50 90 150 mV
Coring Cutoff Level cht - (Note 30) 10 12.5 15 mV
Coring Cutoff Set Voff - (Note 31) - 10 0 10 mV
Coring Gvic 0.5 1.5 5.0
VD Max. Gain VD Gvid - (Note 32) 9.5 11.5 12.5 dB
Peak Clip Gylp 6.5 8.5 9.5
VD Center Gain G - (Note 33) 4.0 6.0 8.0 dB
VD Min. Gain Gygd - (Note 34) - - 60 dB
VD Amp Frequency Characteristics fyd - (Note 35) 10 - - MHz
VD Amp Dynamic Range Viyd - (Note 36) 1.2 - - Vp-p
V1H Amp Gain Gyd1 - (Note 37) 7.5 8.5 9.5 dB
V1H Amp Frequency - - -
Characteristics fydl (Note 38) 10 MHz
V1H Amp Dynamic Range Vid1 - (Note 39) 1.2 - - Vp-p
Video Cross (1) 1hH-9out 0H Coh1 -45 - -
- N 4 B
talk (2) V2H-9out 0H Coh2 ( ote 0) 55 - - d
(1) VOH: VH-scout Cc0h 55 - -
Video-o (2) 1/1H-9Cout Cc1h 55 - -
Chroma (3) 1/2H-9Cout Cth - (Note 41) 55 - - dB
Crosstalk (4) VDin-9Cout Cch - 50 - -
(5) 1/1HdiI-ecout Ccd1 -40 - -
5 2001-06-25
TEST CONDITION
M&TE CHARACTERISTICS
TEST METHOD (Vcc = 9.0V, Ta = 25 i 3°C)
SW & VR MODE
TEST METHOD
G) OH—rA
1 19dB Amp Gain (2) 1H—)B
<3) 2H—)C
(1)V3 Input ;
fo=3.58MHz, V=140mVp.p CW
(2) Measure the Output Level of ®TP13,
(2)14, (315.
(3) Measure the Gain against Input.
(D 0H—>A
19dB Amp
2 Frequency (2) 1H—>B
Characteristic
(3) 2H—>C
(1) V3 Input ;
f : variable, V=140mVp.p CW
(2) Measure the Output Level of ®TP13,
(2)14, (3)15.
(3) Get frequency to make output be —
3dB lower than that at f=1MHz.
CD 0H—)A
19dB Amp Input
on Dynamic Range ® “4—“;
® 2H—>C
(1)V3 Input ;
fo=3.58MHz, V : variable CW
(2) Measure the Output waveform of
®TP13, (2)14, (315.
(3) Get input level to make output wave
form be distorted.
4_ Center Value Circuit Gain
(1)V2 Input ;
fo=3.58MHz, V=1.2Vp-p CW
(2) Measure the Output Level of TP7.
(3) Get frequency to make output be —
3dB lower than that at f=1MHz.
Center Value Circuit
Frequency Characteristic
(1)V2 Input ; f : variable, V=1.2Vp-p CW
(2) Measure the Output Level of TP7.
(3) Get frequency to make output be —
3dB lower than that at f=1MHz.
TA8748AN - 6
TOSHIBA
TA8748AN
TEST CONDITION (VCC = 9.0V, Ta = 25 t 3°C)
NOTE CHARACTERISTICS SW a. W MODE
NO- 5W105W11SW1gSW17sw135w1gswzz TP2 TP4 TEST METHOD
(1)V2 Input ;
® out fsc F b b b c c c a — — fo=3.58MHz, V : Variable CW
antér Value (2) Measure the Output Waveform of
6 Clrcmt 'Input ®TP21, ®TP7.
Dynamic Range (2) Cout b b b c c c a — — (3) Get input level to make output wave
form be distorted.
TOSHIBA
Center Value fsc A
Circuit Input
out fsc F Leak fsc B
Level fsc C
(1)V2 Input ;
b c c c c a — — fo=3.58MHz, V=1.2Vp.p CW
(2) Measure the Output Level of TP21.
Center Value fsc A
8 Circuit Input fsc B
Cout Leak Level fsc C
(1) V2 Input ;
f0 = 3.58MH2, V =1.2Vp.p CW
(2) Measure the Output Level of TP7.
. . (1)V3|nput;
\. 9 centerva'ue c'rw't a a a b b b a 4.5V4.5V f0=3.58MHz,V=140mVp-pCW
Crosstalk Leak Level (2) Measure Output Level of TP6.
(1) V3 Input ;
fo=3.58MHz, V=140mvw cw
(2) Measure Output Level of ®TP24,
®TP1, TP30.
(3) Get ratio against ®O.28Vp.p,
®o.56vm,. ®o.28vp-p.
®outOH a a a b b b a 4.5V4.5V
Chroma—aVideo
1 V a a b b b a 4.5V4.5V
0 Crosstalk (2) 1” 0‘” a
®VDout a a a b b b a 4.5V4.5V
TA8748AN - 7
TA8748AN
CHARACTERISTICS
TEST CONDITION (VC =9.0V, Ta = 25 i 3°C)
SW 8: VR MODE
TEST METHOD
Comb SW Switching Voltage
(1) V2 Input ;
f0 = 3.58MHz, v =1.2v,,p cw
(2) MeaSure the Output Waveform of
(3)Whi|e increasing the T20 voltage,
measure the voltage at which
waveform of TP6 turns over.
Cadj Amp Max.
Normal
Inverted
(1) V2 Input ;
fo=3.58MHz, V=1.2Vp.p CW
(2) Measure the Output Level of TP6.
(3) Get gain against input.
Cadj Amp Center
Normal
Inverted
(1)V2 Input ;
f0 =3.58MH2, V =1.2Vp.p CW
(2) Measure the Output Level of TP6.
(3) Get gain against input.
Cadj Amp Min.
Normal
Inverted
(1)V2 Input ;
f0 = 3.58MHz, v =1.2v,,.p cw
(2) Measure the Output Level of TP6.
(3) Get gain against input.
Cadj Amp
Frequency
Characteristic
Normal
Inverted
(1)V2 Input ; f : Variable, V=1.2Vp.p CW
(2) Measure the Output Level of TP6.
(3) Get frequency to make output be
—3dB lower than that at f=1MHz.
Cadj Amp Input
Dynamic Range
Normal
Inverted
(1)V2 Input ; f0=3.58MHz, V : Variable
(2) Measure the Output Level of TP6.
(3) Get input level to make output wave
form be distorted.
TA8748AN — 8
TOSHIBA
TA8748AN
CHARACTERISTICS
TEST CONDITION (Vcc = 9.0V, Ta = 25 i 3°C)
SW 8: VR MODE
TEST METHOD
VOH Input Gain
CD out CH
® VD out
(1) V4 Input ; f0=15kHz, V=0.5Vp.p CW
(2) Measure output Level of ®TP24,
®TP30.
(3) Get gain against input.
VH Input Gain
V1H out
(1) V4 Input ; fo=6MHz, V=O.5Vp.p CW
(2) Measure the TP1 Output level.
(3) Get gain against input.
V1H Input Gain
® V1H out
® VD out
(1)V5 Input ; f0=15kHz, V=0.5Vp-p CW
(2) Get output level against ®TP1,
®Tpao.
(3) Get gain against input.
V2H Input Gain
VD out
(1)V5 Input ; fo=15kHz, V=1.0Vp_p CW
(2) Measure of the output level of TP30.
(3) Get gain against input.
VOH Input
Frequency
Characteristics
® out 0H
® VD out
(1)V4 input ; f : variable, V=0.5Vp.p CW
(2) Get against level against ®TP24,
®TP30.
(3) Get frequency to make output be
-3dB lower than that at f=1MHz.
VH Input
Frequency
Characteristics
V1H out
(1)V4 Input ; f : variable, V=0.5Vpp CW
(2) Measure of the output level of TP1.
(3) Get frequency to make output be
—3dB lower than that at f=1MHz.
V1 H Input
Frequency
Characteristics
0) V1H out
® VD out
(1)V5 Input ; f : variable, V=0.5Vp_p CW
(2) Measure output level of ®TP1,
(3) Get frequency to make output be
—3dB lower than that at f=1MHz.
V2” Input
Frequency
Characteristics
VD out
(1) V5 Input ; f : variable, V=1.0Vpp CW
(2) Measure output of the TP30.
(3) Get frequency to make output be
—3dB lower than that at f=1MHz.
TA8748AN - 9
TOSHIBA
TA8748AN
NOTE CHARACTERISTICS
TEST CONDITION (Vcc = 9.0V, Ta = 25 1 3°C)
SW & VR MODE
TEST METHOD
VDH Input
Dynamic Range
® out 0H
® VD out
(1) V4 Input ; f=15kHz, V : variable CW
(2) Measure output level of ®TP24,
®TP30.
(3) Get input level to make output wave
form be distorted.
VH Input
26 Dynamic Range
V1H out
(1)V4 Input ; f=6kHz, V : Variable CW
(2) Measure the output waveform of the
(3) Get input level to make output wave
form be distorted.
V1H Input
27 Dynamic Range
CD V1H out
® VD out
(1)V5 Input ; f=15kHz, V : Variable CW
(2) MeaSure output level of ®TP1,
(3) Get input level to make output wave
form be distorted.
V2H Input
8 Dynamic Range
VD out
(1)V5 Input ; f=15kHz, V : variable CW
(2) Measure the output level of TP30.
(3) Get input level to make output wave
form be distorted.
TA8748AN - 10
TOSHIBA
TA8748AN
CHARACTERISTICS
TEST CONDITION (Vcc = 9.0V, Ta = 25 i 3°C)
SW & VR MODE
TP27 TP4 TEST METHOD
Coring Peak Clip Level
(1) Measure voltage TP3 : V30,
TP : V60 with no input.
9V 4-5V (2) Change TP3 Voltage over V30 $0.5V
(3) Measure TPG and Get following.
(4) Get
Coring Cutoff Level
AVTPG ®
9V 4.5V
Coring Offset
AVch + AVd
AVp] ----- ’z‘lku
9V 4.5V
AVd AVch 4VTP3
AVph + AVpI
AVch + AVcl
G) Coring
8.5V 4.5V (1) V1 Input ; fo =15kHz ®vi = 5mvp.,,,
®Vi = 0.1V”, 0.14vpp,
VD Max. Gain Q) VD
®vi = 0.4V”, 0.45vpp
8.5V 4.5V (2) Measure TP6 Output Level of V5 (Vi).
(3) Get ®V5 (5mV)/ 5mV,
(3 Peak Clip
®V5 (a_14v) —V5 (0.1V) /O.14V — 0.1.
8.5V 4.5V (3V5 (0.45V) - V6 (0.4) / 0.45V — 0.4
VD Center Gain
(1) V1 Input ;
f0 =15kHz, vi =o.1vw, 0.14vp.p
(2) Measure the output level V5 M) of
(3) Measure the V6 (o_14v)-6V (0.1V)/
4.5V 4.5V
0.14V-0.1V
TA8748AN - 11
TOSHIBA
TA8748AN
CHARACTE RISTICS
TEST CONDITION (VC
= 9.0V, Ta = 25 i 3°C)
SW 8: VR MODE
TP27 TP4
TEST METHOD
VD Min. Gain
0.5V 4.5V
(1)V1 Input ; fo=15kHz, Vi=().1Vp.p
(2) Measure the output level of the TP6.
(3) Get Gain against input.
VD Amp Frequency
Characteristics
9V 4.5V
(1)V1 Input ; f : variable, Vi=0.14Vp.p
(2) Measure the output level of the TP6.
(3) Get frequency to make output be
-3dB lower than that at f=1MHz.
VD Amp Dynamic Range
9V 4. 5V
(1)V1 Input ; f0=15kHz, V=0.1Vp.p
(2) Measure the output waveform of TP6.
(3) Get input level to make output wave
form be distorted by except coring.
V1H Amp Gain
4.5V 4.5V
(1)V1 Input ; f0=15kHz. Vi=1.0Vp-p
(2) Measure the output level of TP6.
(3) Get Gain against input.
V1 H Amp Frequency
Characteristics
4.5V 4.5V
(1)V1 Input ; f : variable, V=1.0Vp-p
(2) Measure the output level of TP6.
(3) Get frequency to make output be
—3dB lower than that at f=1MHz.
V1H Amp Dynamic Range
4.5V 4.5V
(1)V1 Input ; f0=15kHz, V variable
(2) Measure the output waveform of TP6.
(3) Get input level to make output wave
form be distorted.
TA8748AN - 12
TOSHIBA
TA8748AN
NOTE CHARACTERISTICS
TEST CONDITION (VCC = 9.0V, Ta = 25 i 3°C)
SW & VR MODE
TEST METHOD
Crosstalk
40 between
G) V1H—>out CH
4.5V 4.5V
® VzH—hout OH
4.5V 4.5V
(1) V4 Input ; f0=3.58MHz,
®V =0.5Vp_p, ®V =1.0Vp.p
(2) Measure of the output level of TP24.
(3) Get ratio against 1.0Vp.p.
Video—)
Chroma
Crosstalk
(D VOH: VH—a
4.5V 4.5V
(1) v4 Input ; f0=3.58MHz, v=o.5vp-p,
with no chroma input.
(2) MeaSure the output level of TP7.
(3) Measure the attenuation level.
® V1H“’Cout
4.5V 4.5V
® V2H->Cout
4.5V 4.5V
(1) V5 Input ;
f0 = 3.58MHz, (EN = 0.5Vp.p,
®V=1.0Vp.p with no chroma input.
(2) Measure the output level of TP7.
(3) Measure the attenuation level.
@ VDin->Cout
4.5V 4.5V
® V1Hdil"cout
4.5V 4.5V
(1)V1 Input ;
f0=3.58MHz, ®V=o.5Vp.p,
@V=1.0Vp.p with no chroma input.
(2) Measure the output level of TP7.
(3) Measure the attenuation level.
TA8748AN - 13
TOSHIBA
TA8748AN
TOSHIBA
TA8748AN
TEST CIRCUIT
Vcc=9V
1 Delay Line 4 L P F t C)
+ Ln '" '"
V1 a ff i) I J g m
J? E N E n:
b f, F m _
m g u.
m m sws a _ a 1
ore -,E , , '1'i'
b°\s TP1 o
53 SW3 2 1 VIH Output VD Output l C"
o TP2 U
E Fig 'cr-OD VD Output VCC (i))-
T" _ c TP3
_- 2 - SW28
J lg _ 3 VDInput V2H Ciisl +=w/1F o/c 0
5 lop TP4 . Ch, +n- SW27°_E oba
_ - u. 'es'-(Ci) Comb adj V1H 27 u 34 C)
"L31 J C15 10/tF SWZGCWE Jba Video 0H (L)
, Je. VIH Del VH @CTIOM F 3/6 L
- . ,u c b
"- SW25 a
o/ji- Y1 Output VOH tii) 'tt a/c .
o-. C13 10/1F co-t Video 0H (L)
C Output 0H Output 24 _
'tta Y2 Output GND D-t _--
Lt I CCD Input
001% SW22
C 0.01 F
b C 5 'sitiii fsc c fsc F Output D-pt-c a
" I' gsw10 C6 0.01,uF
l C 'i'"-'t12 fsc B Comb SW D-o TP20 SW19
‘1"); Cy 0.01/5 f 9 co-t
o F'-(1i? f A sc 0H 1 F-v.--"--
a ti, C sc C11 th01pF i-tit, a Chroma OH
2 TP13 T
F-tr--":
",'i''-'ki"-fiis fscAOutput fsc 1H Rrt-,, F c i'a'-o7,o-, 1H
. roma
V2 o-, SW12 TP14 10 /2 out boSW18
ts tt C "-'ty"-'(1Ci fsc 3 Output fsc 2H 17 I a/ac
n: ' G C9 0.01/1F b Chroma 2H
, "t'y'''-'ai fsc C Output Bias 16 C+ SW17
8 10pF
"-o V3
no tt (E
as P m
APPLICATION CIRCUIT
‘ qaoz TA8749$ m
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C Output
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Video Input
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""" 1301' (Note) 2801 : H.P.F. (fc=6MHz)+L.P.F. (fc=6MHz)
2302 2 H.P.F. (fo-3.58MH2), DL-140ns)
2303 : DL (DL=140ns)
2804 : H.P.F. (f0 =14.3MHZ)
2805 : L.P.F. (fc=1.0MHz, DL=140ns)
TA8748AN - 1 5
TA8748AN
TOSHIBA TA8748AN
DOUBLE COMB FILTER UNIT ADJUSTMENT
Initial Condition
Input Signal : Linearity Signal 2Up-p
fsc Signal : 1Vp-p
VR : RBS1~58 : Center
Input Signal Amplitude
Adjust R357 to make signal Amplitude at QBOS emitter by li/p-p.
. Amplitude, Phase of 1H Delay Signal
Sum up TA8748AN pin 12 Signal and reversed pin 11 Signal with Oscilloscope.
Adjust R851 and R352 mutually to make this summed signal be minimum level.
Amplitude, Phase of 2H Delay Signal
Sum up TA8748AN pin 10 Signal and reversed pin 11 Signal with Oscilloscope.
Adjust R353 and R354 mutually to make this summed signal be minimum level.
Vertical edge Enhance Signal
Adjust R358 to make pin 30 signal be minimum level.
Comb Filter Gain, Phase
Monitor Your
Adjust R355 and RB56 mutually to make Chroma element be minimum level.
Yout Amplitude
Adjust R357 to make the amplitude of Yout Video (without SYNC) to be 1.43Vp_p.
16 2001-06-25
TOSHIBA TA8748AN
PACKAGE DIMENSIONS
SDIP30-P-400-1.78 Unit : mm
F""'1r-nr'"nr'-1rnr-l7nr-"lr"-1f'C1f-lr-lr-1r-nr-1
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27.9MAX ,
27.4t0.2
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1.254TYP . .1 E -tjClirts?
Weight : 1.99g (Typ.)
17 2001-06-25
TOSHIBA TA8748AN
RESTRICTIONS ON PRODUCT USE
000707EBA
OTOSHIBA is continually working to improve the quality and reliability of its products.
Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent
electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer,
when utilizing TOSHIBA products, to comply with the standards of safety in making a safe
design for the entire system, and to avoid situations in which a malfunction or failure of such
TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified
operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please
keep in mind the precautions and conditions set forth in the "Handling Guide for
Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc..
OThe TOSHIBA products listed in this document are intended for usage in general electronics
applications (computer, personal equipment, office equipment, measuring equipment, industrial
robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor
warranted for usage in equipment that requires extraordinarily high quality and/or reliability or
a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended
Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship
instruments, transportation instruments, traffic signal instruments, combustion control
instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA
products listed in this document shall be made at the customer's own risk.
0 The products described in this document are subject to the foreign exchange and foreign trade
OThe information contained herein is presented only as a guide for the applications of our
products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of
intellectual property or other rights of the third parties which may result from its use. No
license is granted by implication or otherwise under any intellectual property or other rights of
TOSHIBA CORPORATION or others.
0 The information contained herein is subject to change without notice.
18 2001-06-25
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