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A circuit for biasing a field effect transistor using two voltages. With said circuit, the bias point of the transistor may be varied by varying the source bias voltage. At least one access electrode is polarized from a bias voltage through a first secondary transistor operating as saturable load. T

A circuit for biasing a field effect transistor using two voltages. With said circuit, the bias point of the transistor may be varied by varying the source bias voltage. At least one access electrode is polarized from a bias voltage through a first secondary transistor operating as saturable load. The gate of the main transistor and the gate of the saturable load are connected at two points of a divider bridge, supplied by the two bias voltages and comprising at least two resistors and a second secondary transistor. The gate-source voltage of said saturable load follows the gate-source voltage of said main transistor.

대표청구항 ▼

In a circuit for biasing a first field effect transistor, operating in the ultra high frequency range, whose gate is biased by a voltage through a first resistor, at least one main electrode of the first transistor, through which the ultra high frequency signal leaves, is biased from a voltage sourc

In a circuit for biasing a first field effect transistor, operating in the ultra high frequency range, whose gate is biased by a voltage through a first resistor, at least one main electrode of the first transistor, through which the ultra high frequency signal leaves, is biased from a voltage source through a second field effect transistor operating as a saturable load, whose gate-source voltage follows the gate-source voltage of the first transistor, the gate of the first transistor and the gate of the second transistor being connected at two points of a divider bridge formed by at least two resistors including said first resistor, supplied from the voltage source and the bias voltage through a third transistor connected as current source, the gate of said third transistor also being connected to the divider bridge.