●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 sample and-hold amplifier may be used as a general-purpose op-amp to null the DC offset of the video amplifier. When the HOLD in put 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.
●The video amplifier is optimized for video characteristics, and performance at NTSC is nearly perfect. It is a current-feedback 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 useful in HDTV applications.
●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 ms, or 5 scan lines of 2 ms each, to (/2 IRE
●• VS e g5V to g15V
●• TTL/CMOS hold signal
●Applications
●• Input amplifier in video equipment
●• Restoration amplifier in video mixers
Part 3D Model
