CXA1897Q 查看數據表（PDF） - Sony Semiconductor

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CXA1897Q

Dolby B Type Noise Reduction System with Recording/Playback Equalizer

Sony Semiconductor 

CXA1897Q

Pin

No.

Symbol

DC

voltage

I/O

I/O

resistance

Equivalent circuit

Description

36

36 GND

0.0V — —

GND pin.

GND

43 PB INA1

42 PB INA2

44 PB INB1

41 PB INB2

45 PB FB11

40 PB FB12

0.0V I 70kΩ

Vcc Vcc

10k

10k

1.4V

43

×6

42 147

44

×6

— 105kΩ 41 70k

GND GND

RFS Vcc

Vcc

Playback equalizer input

pin.

1k

1k 210k

5p

×2

147

210k

45

40

Playback equalizer

negative feedback pin.

GND

46 PB FB21 2.8V — —

39 PB FB22

Vcc

2k

×4

46

147

7k ×3

×3

39

RFS

2k

×4

Connects the capacitors which

determine the 120µs, 70µs or

other time constant of the

playback equalizer.

47 PB OUTA1

38 PB OUTA2 2.8V

48 PB OUTB1

37 PB OUTB2

O 147Ω

50kΩ

GND

Vcc Vcc

×3

47 500

38

48 147

37 500

×6

GND

GND

ON/OFF

RFS

ON/OFF

×2

×2

5k

5k

50k

Playback equalizer output pin.

The pin selected by the deck

AB switching has a low output

resistance; the other pin has a

50kΩ output resistance.

GND

GND

—9—

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