LA1781M 查看數據表（PDF） - SANYO -> Panasonic

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LA1781M

For Car Radios Single-Chip Tuner IC

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Pin function

8

Noise AGC sensitivity

9

AGC adjustment

LA1781M

Pin description

After setting up the medium field

(about 50dBμ) sensitivity with the

noise sensitivity setting pin (pin 8), set

the weak field (about 20 to 30dBμ)

sensitivity with the AGC adjustment

pin (pin 9).

Equivalent circuit

3kΩ

3kΩ

15kΩ

200Ω

11

Memory circuit connection

12

Recording circuit used during noise

canceller operation.

8

3kΩ

0.01μF

1MΩ

9

+

0.47μF

0.01μF

6800pF

3.9kΩ

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

30kΩ

N.C

12

13

0.01μF

VCC

PLL

Continued on next page.

No.6038-7/48

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