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LA1145

FM IF System (Quadrature Detector) for Car Radio

SANYO -> Panasonic 

LA1145 Pin Functions (1)

Pin No.

Function

1

IF input

LA1145, 1145M

Internal Equivalent Circuit

Notes

2

Bias pin

3

GND

4

Soft mute start point

control

5

Soft muting gradient

control pin

6

Mute Att

7

FM-AF output

IF limiting amp

GND

For setting the soft mute starting point.

Can be used for S-meter output.

For setting the mute gradient from the soft

mute starting point to the noise finishing

point.

For setting amount of mute attenuation.

The demodulation level changes when the

external resistance value is varied.

8

AFC input

9

IF output

Output to the phase circuit

No. 2725-7/17

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