MC1496 ,Balanced Modulators/Demodulatorsgeneral description of the amplifier composed of transistors Q1, Q2, Q3 and Q4.MC1496, its gain equ ..
MC1496D ,Balanced Modulatosr/DemodulatorsOrder this document by MC1496/D* **BALANCEDMODULATORS/DEMODULATORSThese devices were designed for ..
MC1496DR2 ,BALANCED MODULATORS/DEMODULATORSMAXIMUM RATINGS (T = 25°C, unless otherwise noted.)ARating Symbol Value UnitApplied Voltage V 30 V ..
MC1496DR2G ,BALANCED MODULATORS/DEMODULATORSMaximum ratings applied to the device are individual stress limitvalues (not normal operating condi ..
MC1496L ,30V; 10mA; balanced modulator/demodulatorMOTOROLA" SEMICONDUCTOR 'lil-Ill-lil-ill" MC1496TECHNICAL DATA M01596BALANCEDBALANCED MODULATOR! DE ..
MC1496N ,30V; 10mA; balanced modulator/demodulator. For suppresed carrier and amplitude modulation, synchronous detection, FM detection, phase detection, sampling, single sideband, frequency doubling
MC74F02D ,QUAD 2-INPUT NOR GATE FAST SCHOTTKY TTL
MC74F02D ,QUAD 2-INPUT NOR GATE FAST SCHOTTKY TTL
MC74F02D ,QUAD 2-INPUT NOR GATE FAST SCHOTTKY TTL
MC74F08D ,QUAD 2-INPUT AND GATE FAST SCHOTTKY TTL
MC74F10D ,TRIPLE 3-INPUT NAND GATE FAST SCHOTTKY TTL
MC74F112N ,DUAL JK NEGATIVE EDGE-TRIGGERED FLIP-FLOP
MC1496
Balanced Modulators/Demodulators
AN531/D
MC1496 Balanced
Modulator
Prepared by: Roy HejhallApplications Engineering
INTRODUCTIONThe ON Semiconductor MC1496 monolithic balanced
modulator makes an excellent building block for high
frequency communications equipment.
The device functions as a broadband, double–sideband
suppressed carrier balanced modulator without a
requirement for transformers or tuned circuits. In addition to
its basic application as a balanced modulator/demodulator,
the device offers excellent performance as an SSB product
detector, AM modulator/detector, FM detector, mixer,
frequency doubler, phase detector, and more.
The article consists of a general description of the
MC1496, its gain equations, biasing information, and
circuits illustrating typical applications. It is followed by an
appendix containing a detailed mathematical ac and dc
analysis of the device.
Many readers may find that one of the circuits described
in the article will fill the needs of their application. However,
it is impossible to show typical circuits for every possible
requirement, and the detailed analysis given in the appendix
will assist the designer in developing an optimum circuit
for any application within the basic capabilities of the
MC1496.
MC1496 General DescriptionFigure 1 shows a schematic diagram of the MC1496. For
purposes
assumptions have been made for simplification: (1) Devices
of similar geometry within a monolithic chip are assumed
identical and matched where necessary, and (2) transistor
base currents are ignored with respect to the magnitude of
collector currents; therefore, collector and emitter currents
are assumed equal.
Referring to Figures 1 and 2, the MC1496 consists of
differential amplifier Q5–Q6 driving a dual differential
amplifier composed of transistors Q1, Q2, Q3 and Q4.
Transistors Q7 and Q8 and associated bias circuitry form
constant current sources for the lower differential amplifier
Q5–Q6.
The analysis of operation of the MC1496 is based on the
ability of the device to deliver an output which is proportional
to the product of the input voltages VX and VY
when the magnitudes of VX and VY are maintained within the
limits of linear operation of the three differential amplifiers in
the device. Expressed mathematically, the output voltage
(actually output current, which is converted to an output
voltage by an external load resistance), VO is given by
Carrier
Input
Signal
Input
Bias 5
V– 14
