Fully differential voltage-current converter

Details Fully differential voltage-current converter Fully differential voltage-current converter

1998-10-05

1999-11-02

Wong, Peter S.

Electric power conversion systems

Current conversion

Constant current to constant voltage or vice versa

330260, H02M 700, H03F 345

Patent

active

059782404

ABSTRACT:
A fully differential voltage-current converter, comprising a differential operational amplifier which is supplied with a differential voltage to be converted into a current, a first transistor being fedback to a noninverting input of the amplifier, a second transistor being fedback to an inverting input of the amplifier, the second transistor having the opposite polarity with respect to the first transistor, a third transistor and a fourth transistor having mutually opposite polarities being connected between a supply voltage and ground and to the second transistor in order to force a current that flows through the second transistor to be equal to a current that flows through the first transistor, a gate terminal of the first transistor being connected to a gate terminal of the fourth transistor.

REFERENCES:
patent: 5146179 (1992-09-01), Carley et al.
patent: 5459653 (1995-10-01), Seto et al.
patent: 5568089 (1996-10-01), Maru
patent: 5585763 (1996-12-01), Navabi et al.

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