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US 4,631,493 AGranted
Circuit for DC biasing
AssigneeEaton Corporation
InventorsGeorge D. Vendelin, Behruz Rezvani
Life of this patent
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Abstract
The present invention includes an apparatus and a method for connecting at least a pair of stages in DC series between a pair of power-supply potentials so as to provide economical utilization of the power supply. The stages are connected so as to maintain their AC independence.
Claims7
The combination comprising:
- a first stage for connection to at least one of a pair of power-supply potentials;
- and
- a second stage for connection to at least the other one of said pair of power-supply potentials, said second stage including,
- a field-effect transistor having a drain, a source, and a gate,
- means for coupling said drain of said second-stage transistor to said other one of said pair of power-supply potentials,
- means for DC coupling said source of said second-stage transistor to said first stage and for AC decoupling said source of said second-stage transistor from said first stage, and
- means for biasing said gate of said second-stage transistor at a predetermined DC potential which is independent of the level of the DC current which flows through said second-stage transistor establishing the DC potential developed at said source of said second-stage transistor.
4 more elements
Dependencies are inferred from the claim text.