ha12192f Renesas Electronics Corporation., ha12192f Datasheet - Page 15

• Manufacturer Part Number: ha12192f
• Description: Audio Signal Processor For Car Deck Decode Only Dolby B-type Nr With Pb Amp.
• Manufacturer: Renesas Electronics Corporation.

Music Sensor Time Constant
(1) Sensing no signal to signal (Attack) is determined by C6.
(2) Sensing signal to no signal (Recovery) is determined by C6 and R11, however preceding (1), 100k to
Music Sensor Output (MSOUT)
As for the internal circuit of music sensor block, music sensor output pin is connected to the collector of
NPN type directly, therefore, output level will be “high” when sensing no signal. And output level will be
“low” when sensing signal.
Connection with microcomputer, design I
*MSOUT
Note: Supply voltage of MSOUT pin must be less than V
The Tolerances of External Components for Dolby NR-Block (Only HA12192F Series)
For adequate Dolby NR tracking response, take external components shown below.
0.01 F to 1 F capacitor C6 can be applicable.
1M R11 can be applicable.
I
L
=
DV
Sensing no signal to signal = C6
Sensing signal to no signal = C6
Lo
CC
: Sensing signal (about 1V)
– MSOUT
R
L
Lo
*
Figure 6 Tolerance of External Components
L
BIAS
at 1mA Typ.
45000 (sec)
R11 (sec)
6
HA12192F series
R8
18kΩ
±2%
HA12192F/HA12197F/HA12212F Series
CC
DET(R)
DET(L)
voltage.
16
5
C10
0.1µF
±10%
C4
0.1µF
±10%
Rev.5, Jun. 1999, page 15 of 89