HA12215 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HA12215

Audio Signal Processor for Cassette Deck (Dolby B-type NR with Recording System)

Hitachi -> Renesas Electronics 

HA12215F

R1

RIN

ROUT

15k

25.5mV 21.4dB 300mV

Input

56

8

Output

C2

0.1µ ALC

C4

55

R2

ALC

9 ALCIN R12

2.2k

13 ALCDET

VCC

C12

Figure 12 ALC Block Diagram

ALC Operation Level Necessary

ALC operation level is variable to pin 12 bias (ALC-CAL: 0 to 5 V), and its range is ±4.0 dB.

Unnecessary, pin 12 is unforced.

ALC-CAL = 5V

ALC-CAL = 0V

RIN

Figure 13 ALC-CAL Characteristics

Rev.5, Oct. 1999, page 16 of 69

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