HA12134A Datasheet, PDF (11/27 Pages) Hitachi Semiconductor – Dolby B-Type Noise Reduction System

HA12136A
0
HA12134A, HA12135A, HA12136A
–10
–20
NR–ON
–30
NR–OFF
–40
100
200
400
1k
2k
Frequency [Hz]
4 k 6 k 10 k
20 k
Figure 7 REC Mode Ripple Rejection Ratio vs. Frequency
HA12136A
–10
–20
–30
NR–OFF
–40
NR–ON
–50
100
200
400
1k
2k
4k
Frequency [Hz]
10 k
20 k
Figure 8 PB Mode Ripple Rejection Ratio vs. Frequency
Rev.3, Jun. 1999, page 11 of 27