Video enhancement circuit diagram
Posted on Dec 11, 2010 6013
- Video Circuits
Enhancement circuit as shown in the high-frequency component of the video signal can be increased, thereby enhancing the contrast of the TV image, it can also be connected to t
he output terminal between the VCR and the TV SCART input. Circuit transistor Tl dampening effect. The resistance Rl ensure enhanced input impedance of the circuit is approximately 75. Signal applied to the amplifier stage T2, the gain depends on the position of the potentiometer P2. T2 signal frequency characteristics of the base by Pl, R6, C6 constraints, and therefore to some extent, controllable by the user (via Pl). T3 buffer stage provides sufficient current for properly driving the vast majority 75 load. Adjust the potentiometer P2, the output is 1Vp-p (open-circuit output level should be 2Vp-p).