variable-transconductance circuit

variable-transconductance circuit

[′ver·ē·ə·bəl ¦tranz·kən¦dək·təns ′sər·kət]
(electronics)
A circuit used in four-quadrant multipliers that employs a simple differential transistor pair in which one variable input to the base of one transistor controls the device's gain or transconductance, and one transistor amplifies the other's variable input, applied to the common emitter point, in proportion to the control input.
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