HA12215F Datasheet, PDF (63/69 Pages) Hitachi Semiconductor – Audio Signal Processor for Cassette Deck(Dolby B-type NR with Recording System)

HA12215F
ALC Operate Level vs. Input Level
10
f = 1kHz, V_S ±7.0V, Both channel input (L, Rch)
RIN → RECOUT, RIN = 192.8mVrms = 0dB
TYPE I, IV
cal = 5V
8
TYPE II
6
4
2
0
−2
−5
cal = 5V
cal = 2.5V
cal = 2.5V
cal = 0V
cal = 0V
0dB = 192.8mVrms
Vin _R4
13k
56 RIN
C4
0.1µ
55 ALC
R3
2.2k
0
5
10
15
20
25
30
35
Input Level Vin (dB) RIN = 192.8mVrms = 0dB
ALC Total Harmonic Distortion vs. Input Level (1)
f = 1kHz, V_S = ±7.0V
TYPE I,IV
(Norm tape, Metal tape)
1.0
Cal = 0V
Cal = 2.5V
Cal = 5V
0.1
0.01
−5
0
5
10 15 20 25 30
Input Level Vin (dB)
Rev.5, Oct. 1999, page 63 of 69