| 摘要 |
A circuit is described for obtaining a controllable phase shift with very little amplitude variation at ultrahigh frequencies, the circuit being entirely solid state and readily integrated. This is achieved by a shunt-series feedback pair of transistors wherein the output of a first transistor is applied through a second emitter follower transistor and a feedback path to the base of the first transistor, together with a variable capacitance diode connected in shunt with the collector-base junction of the first transistor.
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