Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1997-03-27
1999-10-26
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327535, G05F 110
Patent
active
059735430
ABSTRACT:
A bias circuit for a bipolar transistor includes a constant voltage source connected to a base electrode of the bipolar transistor; and a resistor connected in series between the constant voltage source and the base electrode of the bipolar transistor. By selecting an appropriate resistance for this resistor, the bias point moves due to a change in the voltage drop across the resistor. The change occurs because the base current flowing through the resistor changes, whereby the operating class of the transistor changes, resulting in a high efficiency at a desired output power.
Callahan Timothy P.
Mitsubishi Denki & Kabushiki Kaisha
Zweizig Jeffrey
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