HA12177 データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA12177

Audio Signal Processor for Car Deck and Cassette Deck (Dolby B/C-type NR with PB Amp)

Hitachi -> Renesas Electronics 

HA12173 Series

Music Sensor Output (MS OUT)

As for the internal circuit of music sensor block, music sensor out pin is connected to the collector of NPN

Type directly, Output level will be “high” when sensing no signal. And output level will be “low” when

sensing signal.

Connection with microcomputer, design IL at 1 mA typ.

IL

=

DVCC

– MSOUTLo *

RL

* MSOUTLo: Sensing signal (about 1 V)

Notes: 1. Supply voltage of MS OUT pin must be less than VCC voltage.

2. MS VCC pin and VCC pin are required the same voltage.

The Tolerances of External Components for Dolby NR-block

For adequate Dolby NR tracking response, take external components shown below.

BIAS

3

R11

18 k

±2%

R32

22 k

±2%

C21

2200 p

±5%

C20

2200 p

±5%

R31

560

±2%

C18

2200 p

±5%

C17

0.1 µ

±10%

C16

0.1 µ

±10%

37

36

35

34

33

32

PB OUT SS1

SS2

CCR

HLS

LLS

(L)

(L)

(L)

(L)

DET (L) DET (L)

HA12173 Series (PB 1 Chip)

PB OUT SS1

SS2

CCR

HLS

LLS

(R)

(R)

(R)

(R)

DET(R) DET(R)

6

7

8

9

10

11

R12

22 k

±2%

C7

2200 p

±5%

C6

2200 p

±5%

R13

560

±2%

C9

2200 p

±5%

C10

0.1 µ

±10%

C11

0.1 µ

±10%

Figure 6 Tolerances of External Components

Unit R: Ω

C: F

PB Equalizer for Double Speed

PB equalizer can be design for double speed by using external components shown in figure 7. Application

data is shown in figure 8.

Rev.1, Nov. 1992, page 18 of 66

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