This document describes signal processing tasks achievable with a high-speed, monolithic, dual-channel analog multiplier. It focuses on the AD539 device, which allows for the design of megahertz-range voltage-controlled amplifiers (VCAs) and filters that exceed current digital technology capabilities.
The text details the operating principles of the 2-quadrant AD539 multiplier, including its input characteristics, gain control mechanisms, and transfer functions. It provides circuit examples such as a dual-channel VCA configuration using external operational amplifiers to achieve high bandwidth and low distortion.
The control input Vx has a full-scale range from zero to +8V.
The output is a current of nominally +1 mA with a peak of +2.2 mA.
Using precision 500 loads, the gains track within 0.025 dB.