Balanced current mirror

Details Balanced current mirror Balanced current mirror

1998-07-01

1999-07-27

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323313, 323314, G05F 316

Patent

active

059296224

ABSTRACT:
A current mirror circuit comprising a first controller for providing a first current path, the controller comprising a current reference means for providing a control signal corresponding to the current level of the first current path; a second controller for providing a second current path, the second controller comprising current control means for controlling the level of current through the second current path in response to the control signal; and a balancing circuit, connected in series with said current reference means in the first current path and with said current control means in the second current path, for maintaining a ratio of the level of currents through the first and the second current paths by providing substantially the same relative reference voltage level at first and second locations in said first and second current paths, respectively, while allowing said reference voltage level to vary. The balancing circuit provides substantially the same impedance in the current paths at said first and second reference locations to maintain the same relative reference voltage level at said first and second reference locations in said current paths while allowing said reference voltage level to vary.

REFERENCES:
patent: 5010303 (1991-04-01), Braun
patent: 5432432 (1995-07-01), Kimura

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