CXA2104S データシートの表示（PDF） - Sony Semiconductor

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CXA2104S

US Audio Multiplexing Decoder

Sony Semiconductor 

Pin

No.

Symbol

Pin

voltage

25 VEOUT 4.0V

26 VCAIN 4.0V

Equivalent circuit

Vcc

5P

580

25

580

10k

VCC

47k

47k

20k

VCC

26

CXA2104S

Description

Variable de-emphasis output

pin.

(Connect a 4.7µF non-polar

capacitor between Pins 25

and 26.)

VCA input pin.

Input the variable

de-emphasis output signal

from Pin 25 via a coupling

capacitor.

27 VCATC 1.7V

28 VCAWGT 4.0V

VCC

×4

27

×4

↓

4k ↓

20k

50µ

7.5µ

VCC

40k 40k 3p

2.9V

36k

580

28

580 147

↓

4k↓ 30k

8k

50µ

8µ

Determine the restoration

time constant of the VCA

control effective value

detection circuit.

(the specified restoration

time constant can be

obtained by connecting a

10µF capacitor between this

pin and GND.)

Weight the VCA control

effective value detection

circuit.

(Connect a 1µF capacitor

and a 3.9kΩ resistor in series

between this pin and GND.)

29

NC

—

29

—

–8–

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