CXA1797 Просмотр технического описания (PDF) - Sony Semiconductor

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CXA1797

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

Sony Semiconductor 

Pin

Typical pin voltage

Symbol

I/O Z (in)

No.

DC AC

Equivalent circuit

VCC

147

27 REC BALANCE 2.5V — I 100kΩ

DREF

VEE

CXA1797Q

Description

Recording volume

balance

adjustment

28 GH CAL

29 FQ CAL

VCC

2.5V — I 54kΩ

147 54k

VEE

High-frequency

gain adjustment of

recording

equalizer amplifier

Peak frequency Q

adjustment of

recording

equalizer amplifier

VCC

30 REC CAL

2.5V — I 54kΩ

147 54k

VEE

Recording

equalizer amplifier

gain adjustment

31 DVCC

+5.0V — I —

VCC

DREF

DGND

VEE

DVCC

Logic power

supply

(DREF = 1/2

(DVCC + DGND) is

CAL reference.)

—9—

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