Novel biasing scheme for gaasfet amplifier

Details Novel biasing scheme for gaasfet amplifier Novel biasing scheme for gaasfet amplifier

H - Electricity

03

F

H03F 3/193 (2006.01) H03F 1/02 (2006.01) H03F 1/30 (2006.01)

Patent

CA 2272740

A bias circuit for a pair of field effect transistor (FET) stages comprising a circuit for AC coupling a signal amplified by a first stage to the input of a second stage, a power source for supplying DC operating current to both of the stages in series, a circuit for sensing current drawn by the second stage and in response thereto for controlling bias of the first stage, and a circuit for blocking AC signals amplified by the first stage from being passed via a DC operating current path to the second stage, whereby the same DC operating current is passed through both first and second stages and is blocked from passing through the AC coupling circuit.

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