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LM1800N
LM1800 Phase-Locked Loop FM Stereo Demodulator
TL/H/7888
LM1800
Phase-Locked
Loop
Stereo
Demodulator
April 1987
LM1800 Phase-Locked Loop FM Stereo Demodulator
General Description
The LM1800isa second generation integratedFM stereo
demodulator using phase locked loop techniquesto regen-
eratethe38 kHz subcarrier. The numerous features inte-
gratedonthedie make possiblea system delivering high
fidelity sound whilestill meetingthe cost requirementsof
inexpensive stereo receivers. More information availablein
AN-81.
Features Automatic stereo/monaural switching45dB power supply rejectionNo coils,all tuning performed with single potentiometer Wide operating supply voltage range Excellent channel separation Emitter follower output buffers
Connection Diagram
Order Number LM1800N
SeeNS Package Number N16A
TL/H/7888–1
TopView
Typical Application
TL/H/7888–2
C1995National SemiconductorCorporation RRD-B30M115/PrintedinU.S.A.
