Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Patent
1990-09-28
1992-05-19
Stephan, Steven L.
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
323313, 3072966, G05F 316
Patent
active
051151871
ABSTRACT:
A wide dynamic range current source circuit comprising a first current mirror circuit including a first transistor functioning as a first output current path, and a second transistor for receiving a first control voltage and functioning as an input current path for controlling a current flowing in the output current path. The wide dynamic range current source circuit further comprises a second current mirror circuit including a third transistor functioning as a second output current path bypassing the input current path of the first current mirror circuit, and a fourth transistor for receiving a second control voltage different from the first control voltage and controlling a current of the second output current path. The second current mirror circuit controls current flow in the first mirror circuit such that this current flow is larger than a current flowing during a non-linear operation of the first current mirror circuit.
REFERENCES:
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patent: 4536702 (1985-08-01), Nagano
patent: 4814724 (1989-03-01), Tanigawa
patent: 4975632 (1990-12-01), James et al.
patent: 4977336 (1990-12-01), Martiny
Davidson Ben
Stephan Steven L.
Sumitomo Electric Industries Ltd.
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