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The EL2090C is the first complete DC-restored monolithic video amplifier sub-system. It contains a very high-quality video amplifier and a nulling sample-and-hold amplifier specifically designed to stabilize video performance. When the HOLD logic input is set to a logic 0 during a horizontal sync, the sampleand- hold amplifier may be used as a general-purpose op-amp to null the DC offset of the video amplifier. When the HOLD input goes to a logic 1 the sample-and-hold stores the correction voltage on the hold capacitor to maintain DC correction during The video amplifier is optimized for video characteristics, and amplifier, so that b3 dB bandwidth changes little at various closed-loop gains. The amplifier easily drives video signal levels into 75X loads. With 100 MHz bandwidth, the EL2090 is also The sample-and-hold is optimized for fast sync pulse response. The application circuit shown will restore the video DC level in five scan lines, even if the HOLD pulse is only 2 ms long. The output impedance of the sample-and-hold is low and constant over frequency and load current so that the performance of the video amplifier is not compromised by connections to the DC The EL2090C is fabricated in Elantec's proprietary Complementary Bipolar process which produces NPN and PNP transistors with equivalent AC and DC performance. is specified for operation over the 0ßC to 75ßC temperature range. (all content is the responsibility of the poster) |
H.Roth@oklahomaselltoday.com (Hollie Roth) for more information. All emails will be forwarded to the poster's actual email address.