LA1781M(2001) Просмотр технического описания (PDF) - SANYO -> Panasonic

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Компоненты Описание

производитель

LA1781M
(Rev.:2001)

Single-Chip Tuner IC for Car Radios

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Function

LA1781M

Description

Equivalent circuit

8

Noise AGC sensitivity

9

AGC adjustment

After setting up the medium field

(about 50 dBµ) sensitivity with the

noise sensitivity setting pin (pin 8),

set the weak field (about 20 to

30 dBµ) sensitivity with the AGC

adjustment pin (pin 9)

11

12

Memory circuit connection

Recording circuit used during

noise canceller operation.

3 kΩ

3 kΩ

15 kΩ

200 Ω

8

3 kΩ

0.01 µF

1 MΩ

9

+

0.47 µF

0.01 µF

6800 pF

3.9 kΩ

A11715

A11715

13

12

11

VCC

Differential

amp

Gate

circuit

13

Pilot input

Pin 13 is the PLL circuit input pin.

14

N.C, MPX, MRC, GND

Ground for the N.C., MPX, and

MRC circuits.

LPF

30 kΩ

N.C

12

13

0.01 µF

A11716

VCC

PLL

A11717

Continued on next page.

No. 6038-7/50

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