HA12203 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HA12203

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

Hitachi -> Renesas Electronics 

HA12203NT/HA12204NT

Bias Switch

This series built-in DC voltage generator for bias oscillator and its bias switches.

External resistor R15, R16, R17 Which corresponded with tape positions and bias out voltage are relater

with below.

Vbias =..

R14

(R15 or R16 or R17) + R14

× (VCC − VEE − 0.7) + VEE [V]

Bias switch follows to a logic of 15 pin (B / Norm / Crom / Metal).

Note: A current that flows at bias out pin, please use it less than 5 mA.

BIAS (N)

R15

P25

BIAS (C)

R16

P24

BIAS (M)

R17

P23

Vbias

R14

VEE

Figure 11 External Components of Bias Block

Rev.3, Jun. 1999, page 16 of 97

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