HA12134A Datasheet, PDF (20/27 Pages) Hitachi Semiconductor – Dolby B-Type Noise Reduction System

HA12134A, HA12135A, HA12136A
90
HA12135A
85
PB NR-ON
80
REC NR-OFF
75
PB NR-OFF
70
REC NR-ON
65
60
55
6
8
10 12 14
16 18
Supply voltage VCC[V]
Figure 25 REC/PB Signal to Noise Ratio vs. Supply Voltage
12
HA12134A
10
8
6
12 V
16 V
–40 dB
6.5 V
–30 dB
4
2
0
100 200
–20 dB
–10 dB
0 dB
500 1 k 2 k 5 k 10 k 20 k 50 k 100 k
Frequency [Hz]
Figure 26 Encode Boost vs. Frequency
Rev.3, Jun. 1999, page 20 of 27