General Description

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 subsequent scan line.

Features

• Complete video level restoration system

• 0.01 differential gain and 0.02° differential phase accuracy at NTSC

• 100 MHz bandwidth

• 0.1 dB flatness to 20 MHz

• Sample-and-hold has 15 nA typical leakage and 1.5 pC charge injection

• System can acquire DC correction level in 10 μs, or 5 scan lines of 2 μs each, to (/2 IRE

• VS = ±5V to ±15V

• TTL/CMOS hold signal

Applications

• Input amplifier in video equipment

• Restoration amplifier in video mixers