HA12227F データシートの表示（PDF） - Renesas Electronics

部品番号

コンポーネント説明

メーカー

HA12227F

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

Renesas Electronics 

HA12226F/HA12227F

Input Block Diagram and Level Diagram

The each level shown above is typical value MS

when offering PBOUT level to PBOUT pin.

REF

300mVrms PASS

PBOUT

REC

580mVrms

PB PASS/REC,

PB=5.7dB/5.7dB

FLAT

PB/REC,

AIN

(120µ)

300mVrms

21.3dB

0dB

PASS=0dB/21.4dB 300mVrms

PB

Dolby *1

RECOUT

BIN

25.9mVrms

R3 70µs

12k

REC

PASS

B-NR

300mVrms

300mVrms

R4

15k

ALC

25.5mVrms

C2

4700pF

C1

0.1µF

R1

15k

RIN

200mVrms

R2 C3

2.2k 0.1µF

Note: 1. The HA12227F is not built-in Dolby B-NR.

Figure 2 Input Block Diagram

PB Equalizer

By switching logical input level of pin 17 (for Ain) and pin 19 (for Bin), you can equalize corresponding to tape

position at play back mode.

GV

t1

t2

t1 = C2 ⋅ (12k + 15k)

t2 = C2 ⋅ 15k

f

Figure 3 Frequency Characteristic of PB Equalizer

Rev.6.00 Jun 15, 2005 page 11 of 83

Share Link: