HA12134A Datasheet, PDF (22/27 Pages) Hitachi Semiconductor – Dolby B-Type Noise Reduction System

HA12134A, HA12135A, HA12136A
HA12134A
–10
–20
NR–ON
–30
NR–OFF
–40
–50
100 200 400
1k 2k 4k
Frequency [Hz]
10 k 20 k
Figure 29 REC Mode Ripple Rejection Ratio vs. Frequency
HA12134A
–10
–20
–30
NR–OFF
–40
NR–ON
–50
100 200 400
1k 2k 4k
Frequency [Hz]
10 k 20 k
Figure 30 PB Mode Ripple Rejection Ratio vs. Frequency
Rev.3, Jun. 1999, page 22 of 27