Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Patent
1994-04-14
1996-03-05
Wong, Peter S.
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
327103, G05F 326
Patent
active
054970741
ABSTRACT:
A balanced voltage-to-current converter has two cells. Each cell has a first input terminal coupled to a first current source via a diode-connected first transistor and to an output terminal via the main current path of a third transistor, and a second input terminal coupled to a second (controllable) current source via the main current path of a second transistor. The control electrode of the third transistor is connected to the node between the second current source and the second transistor. The first input terminal of one of cell is connected to the second input terminal of the other cell and vice versa. The quiescent current through the third transistor is controlled by a differential amplifier which compares the voltage difference between the control electrode and a first main electrode of the third transistor with a reference voltage which is representative of the current through the third transistor. The output signals of the differential amplifiers are summed in an adder and are applied to control inputs of the second current sources.
REFERENCES:
patent: 4100433 (1978-07-01), Duffy et al.
patent: 4574233 (1986-03-01), Taylor
patent: 5341087 (1994-08-01), Van Leeuwen
patent: 5404097 (1995-04-01), Barou
Franzblau Bernard
Riley Shawn
U.S. Philips Corporation
Wong Peter S.
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