Video luminance matrix circuit composed of broadband transconductance op amp and buffer OPA660

Published:2012/8/22 21:59:00 Author:Ecco | Keyword: Video, luminance matrix , broadband transconductance, op amp , buffer | From:SeekIC

The OPA660 forms a common-base amplifier circuit, and its pin 2 has three-way signal inputs: red VRED, green VGREEN and blue VBLUE, the signals are amplified by internal OTA and +1 amplifier to become luminance signal VLUMINANCE which is output from pin 6. The accuracy of the resistor connected to three-way signals is 1 %, resulting in the RGB mixing ratio of 30%: 59%: 11%.



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