IF Amplifier. D7678 Datasheet

D7678 Amplifier. Datasheet pdf. Equivalent

Part D7678
Description Video and Sound IF Amplifier
Feature Silicore VIDEO AND SOUND IF AMPLIFIER FOR COLOR AND MONOCHROME TV RECEIVERS CHMC FUNCTION P I F S TA.
Manufacture Shaoxing
Datasheet
Download D7678 Datasheet




D7678
Silicore
VIDEO AND SOUND IF AMPLIFIER FOR COLOR
AND MONOCHROME TV RECEIVERS
CHMC D7678
FUNCTION
PIF STAGE
z Three Controlled IF Amplifier stages
z Video Demodulator Controlled by Picture
Carrier
z Black Noise and White Noise Inverter
z Peak AGC
z DC Amplifier for RF AGC Output
SIF STAGE
z Three Controlled IF Amplifier Stages
z Quadrature Detector
Outline Drawing
F E AT U R E
PIF STAGE
z High Gain, Wide Band IF Amplifier : 50dB(Typ.) at 58MHz
z Gain Reduction with Excellent Stability : 55dB(Typ.) at 58MHz
z Excellent DG/DP Characteristics : DG 7%(Typ.), DP 3.5deg.(Typ.)
z Excellent S/N Characteristics Due to Delayed 3 Stage AGC Action.
z Fast AGC Action Due to Noise Inverter and Peak AGC.
z Switch Off the Video part with VTR Switch.
z Dual Differential AFT Output.
SIF STAGE
z Excellent Limiter Characteristics.
z Excellent AM Rejection.
z L a rg e U n d i s t o r t e d A u d i o O u t p u t Vo l t a g e w i t h Q u a d r a t u r e D e t e c t o r.
SHAOXING SILICORE TECHNOLOGY CO.,LTD
www. Silicore. com. cn
CHMC
1/13



D7678
Silicore
PIN CONNECTION
IF IN 1
FIL 2
RFAGC CON 3
RFAGC OUT 4
SIF IN 5
SIF TA 6
OUT AF 7
IF TA 8
BLOCK DIAGRAM
11 5
9 IF TA
10 SIF TA
11 Vcc
12 VF OUT
13 GND
14 AGC FIL
15 FIL
16 IF IN
6
D7678
BIAS
CIRCUIT
15
16 1nd 2nd 3nd
1 IF IF IF
2
LIMITER
LIMITER
AGC2
4
AGC3
AGC1
3 14
SOUND
DET
7
10
9
VIDEO AMP 8
NOISE
INVERTER
12
13
SHAOXING SILICORE TECHNOLOGY CO.,LTD
www. Silicore. com. cn
CHMC
2/13







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