CXA1878Q Просмотр технического описания (PDF) - Sony Semiconductor

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CXA1878Q

Dolby∗ B-C Type Noise Reduction System with Recording/Playback Equalizer Amplifier

Sony Semiconductor 

Pin

No.

Symbol

Typical pin voltage

I/O Z (in)

DC AC

Equivalent circuit

CXA1878Q

Description

41 CAL IN

0.0V –26dBv I 10kΩ

10k

41

GND

1.5k

Calibration signal input

42 REC MUTE — — I —

42

Recording mute

ON/OFF selection

∗ The recording mute is

30k

controlled with DC

voltages of 0 to 5V.

High: Recording mute OFF

GND

Low : Recording mute ON

∗ Soft mute and fader

functions can be set by

changing the time

constant of the external

time constant circuit.

64

52

VOL OUT1

VOL OUT2

0.0V –10dBv

O

500

64

52 500

5p

Recording volume

amplifier output

6.5k

63 VOL IN1

53 VOL IN2

0.0V –10dBv I 50kΩ

63

53

Recording volume

amplifier input

– 11 –

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