參數(shù)資料
型號(hào): BH7370FS
英文描述: TV Sound and Video Receiver Circuit
中文描述: 電視聲音和視頻接收器電路
文件頁(yè)數(shù): 3/9頁(yè)
文件大小: 131K
代理商: BH7370FS
3
Video ICs
BH7370FS
Input / output circuits
Pin No.
N.C.
1
2
3
5
6
7
8
9
10
4
AGC – ADJ
RF – AGC
REF
OSC – IN
GND1
GND2
AFT – OUT
VIFA
VIFB
ECO
0V
2.2V
0V
3.4V
2V
4.5k
7.8k
5k
5k
2k
100k
100
Vcc
GND
GND
OUT
IN
OUT
IN
Vcc
1k
1k
7.4k
5k
5k
38.9k
10k
10k
60p
16k
10k
2.6V
100k
1k
100k
1k
10k
1k
10k
30k
20k
10k
7.4k
750
Vcc
GND
2
3
5
6
Vcc
GND
8
Vcc
GND
9
V
DD
GND
10
Pin name
IN / OUT
Voltage
Equivalent circuit
Function
Adjusting the RFAGC delay point.
A fixed resistor (20k
) is normally
fixed between grounds. For greater
precision, adjust with a variable
resistor (50k
).
Internally open
RF-AGC output (reverse). Because
of open collector output, gain can be
set with an attached resistor (the
minimum value for pin 3's maximum
sink current is 0.7mA). Pin 3 voltage
should remain below 7 V.
Bipolar ground for the VIF, AGC
and video system.
Bipolar ground for the SIF and VCO.
4MHz reference oscillator input
(input level = 25 - 100mV
P-P
,
frequency precision = 0.1% or less)
Reference filter detection output.
AFT output (CMOS output).
V
DD
and the ground each
have an internal 100k
resistor. Output is 1 / 2V
DD
at the center frequency.
IF input. Use equilibrium input.
0.2V
(13k
connection)
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