EL4089
DC Restored Video Amplifier
Typical Diagram
Key Features
- Complete video level restoration system
- 0.02% differential gain and 0.05° differential phase accuracy at NTSC
- 60MHz bandwidth
- 0.1dB flatness to 10MHz
- VS = ±5V to ±15V
- TTL/CMOS hold signal
Description
The EL4089 is an 8-pin complete DCrestored monolithic video amplifier sub-system. It contains a 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 TTL/CMOS logic 0, the sample - and - hold amplifier can be used to null the DC offset of the video amplifier.
When the HOLD input goes to a TTL/CMOS logic l, the correcting voltage is stored on the video amplifier's input coupling capacitor. The correction voltage can be further corrected as need be, on each video line.
The video amplifier is optimized for video performance and low power. Its current feedback design allows the user to maintain essentially the same bandwidth over a gain range of nearly 10:1. The amplifier drives back-terminated 75Ω lines.
The EL4089 is fabricated in Elantec's proprietary Complementary Bipolar process which produces NPN and PNP transistors with equivalent AC and DC performance. The EL4089 is specified for operation over -40°C to +85°C temperature range.
Applications
- Input amplifier in video equipment
- Restoration amplifier in video mixers
