General Description

The EL2082 is a general purpose variable gain control building block, built using an advanced proprietary complementary bipolar process. It is a two-quandrant multiplier, so that zero or negative control voltages do not allow signal feedthrough and very high attenuation is possible. The EL2082 works in current mode rather than voltage mode, so that the input impedance is low and the output impedance is high. This allows very wide bandwidth for both large and small signals.

Features

• Flexible inputs and outputs, all ground referred

• 150 MHz large and small-signal bandwidth

• 46 dB of calibrated gain control range

• 70 dB isolation in disable mode @ 10 MHz

• 0.15 diff gain and 0.05§ diff phase performance at NTSC using application circuit

• Operates on g5V to g15V power supplies

• Outputs may be paralleled to function as a multiplexer

Applications

• Level adjust for video signals

• Video faders and mixers

• Signal routing multiplexers

• Variable active filters

• Video monitor contrast control

• AGC

• Receiver IF gain control

• Modulation/demodulation

• General ‘‘cold’’ front-panel control of AC signals