Video-line-driving-amplifier


Posted on Oct 21, 2012

Q1 and Q2 form a differential stage which single- ends into the LT1010. The capacitively terminated feedback divider gives the circuit a de gain of 1, while allowing ac gains up to 10. Using a 20-fl bias resistor, the circuit delivers 1 V pk-pk into a typical 75-fl video load. For applications sensitive to NTSC requirements, dropping the bias resistor value will aid performance.


Video-line-driving-amplifier
Click here to download the full size of the above Circuit.

At A ~ 2, the gain is within 0.5 dB to 10 MHz and the -3 dB point occurs at 16 MHz. At A ~ 10, the gain is flat, within ±0.5 dB to 4 MHz, and the -3 dB point occurs at 8 MHz. The peaking adjustment should be optimized under loaded output conditions.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Photodiode-amplifier
Breath-monitor
The 555 Door Alarm
pipe descaler schematics
XC6121 Voltage Detector With Watchdog Function And ON/OFF Control
Mains Supply Failure Alarm
Keypad-Operated Switch No.2
555 capacitance tester circuit diagram
Adjustable thermostat controller circuit diagram created REF01E
Voltage controlled gain amplifier LM307
Turning gear from idling stop circuit diagram



Top