LM1800 Phase-Locked Loop FM Stereo Demodulator
April 1987
LM1800 Phase-Locked Loop FM Stereo Demodulator
General Description
The LM1800 is a second generation integrated FM stereo
demodulator using phase locked loop techniques to regen-
erate the 38 kHz subcarrier The numerous features inte-
grated on the die make possible a system delivering high
fidelity sound while still meeting the cost requirements of
inexpensive stereo receivers More information available in
AN-81
Features
Y
Y
Y
Y
Y
Y
Automatic stereo monaural switching
45 dB power supply rejection
No coils all tuning performed with single potentiometer
Wide operating supply voltage range
Excellent channel separation
Emitter follower output buffers
Connection Diagram
Order Number LM1800N
See NS Package Number N16A
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Top View
Typical Application
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C
1995 National Semiconductor Corporation
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RRD-B30M115 Printed in U S A