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QS7785CF Datasheet(PDF) 12 Page - Nippon Precision Circuits Inc

Part # QS7785CF
Description  3D 2/4-Channel Stereo Surround Synthesizer
PDF  15 Pages
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Manufacturer  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

QS7785CF Datasheet(HTML) 12 Page - Nippon Precision Circuits Inc

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QS7785PF/CF
NIPPON PRECISION CIRCUITS—12
Bass Boost
With a signal input connected to BASC1 and
BASC2, a bass boost function can be implemented.
When BASS is HIGH, resistors RA and RB and
capacitor C are connected to form a lowpass filter.
The lowpass filter signal and the original signal
(RIN, LIN) are combined to boost bass frequencies.
.
Bass boost connection (Gb = 6dB, fC = 300Hz)
36
37
RIN
/LIN
To Internal
RB:10k
R2:20k
R1:20k
C:0.15
µF
Close when BASS=H
Open when BASS=L
VREFOUT
BASC1
/BASC2
+
RA=10k
Bass boost frequency response
Gb
0dB
fL
fH
Gain
Freq.
fC
Gb=20 log
RA+RB
R1
()
1+
fC=
1+
RA+RB
R1
2
πC
RA+RB
RA RB
fL=fC 10
fH=fC 10
1+
RA+RB
R1
log
()
1+2
R1
RA+RB
2
−
1
1+
RA+RB
R1
log
()
1+2
R1
RA+RB
2
1



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