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參數(shù)資料
| 型號(hào)： | BH7802K |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | Single chip Hi-Fi audio signal processor |
| 中文描述： | 單芯片Hi - Fi音頻信號(hào)處理器 |
| 文件頁(yè)數(shù)： | 12/14頁(yè) |
| 文件大?。?/td> | 183K |
| 代理商： | BH7802K |
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12
Video ICs
BH7802K
Circuit operation
Function table
The BH7802K includes the following functions on one chip.
Block name
Main function
Power supply
Pin number
No.
Regulator
35 ~ 39, 42
1
I
2
C BUS control
·
I
2
C BUS data decoder
5 ~ 7
2
UNREG-V
CC
: + 10V
UNREG-V
EE
: – 10V
GND: 38
V
CC3
(internal power supply)
GND: 7
V
CC
(internally wired)
V
EE
(internally wired)
GND: 38
·
±
5V regulator (V
CC,
V
EE
)
·
Anti-pop circuit (ANTI-POP)
FM BPF
13, 16, 19
9
·
FM bandpass filter (FM BPF)
·
NTSC / PAL switch function
·
FM input automatic level adjust circuit (FM ALC: ON / OFF)
V
CC
: 18
GND: 15
·
TUNER (L, R, M) / LINE 1, 2 (L,R) / BS (L, R) switch
27 ~ 30
32
Input switcher
33, 34,
40, 41
43, 44
1 ~ 3
3
V
CC
(internally wired)
V
EE
(internally wired)
GND: 38
·
Line amplifier: + 9.8dB, + 10.3dB, + 11.3dB, + 15.0dB
·
STEREO / LEFT / RIGHT / 9 NORMAL switch
·
MIX ON / OFF switch
·
Mute switch
·
MIXER amplifier for RF converter (with ALC function)
·
BS / LINE2 through mode
·
20kHz line low-pass filter (secondary LPF)
·
20kHz PNR low-pass filter (secondary LPF)
·
PNR processor (MOA, CCA, WTNG, DET)
·
Emphasis / de-emphasis (EMPH / DEEMPH)
·
Switching noise slope-control type differential compensation circuit
·
FM modulation circuit (VCO, DEV)
·
FM demodulation / FM BPF MONITOR output switch (FMOUT SW)
: FM MIX1 to 4, FM L, FM R, BPF L, BPF R
·
Recording FM treble cutoff filter (FM LPF)
·
Over modulation limiter (AUDIO LIM)
·
Playback FM limiter (FM LIM)
·
VCO, BPF automatic adjustment circuit (AUTO AUDIO ADJUST)
·
NTSC / PAL switch function
·
Auto adjustment complete FLAG output circuit (ADJ FLAG)
·
D.O.detector circuit (D.O. DET)
·
Auto FM detector circuit (noise detect method) (FM DET)
Output switcher
4
9 ~ 12
22 ~ 25
V
CC
(internally wired)
V
EE
(internally wired)
GND: 38
PNR processor
6
: Typ, + 10%, – 10%
·
Envelope detector circuit (ENVE)
·
Hold pulse generator
V
CC
: 18
(internally wired)
GND: 15
FM detector control
14, 20
8
8, 14
17, 21
V
CC
: 18
V
EE
(internally wired)
GND: 15
Modulator
7
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