Output circuit with increased output current

Details Output circuit with increased output current Output circuit with increased output current

1996-12-23

1999-04-13

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327562, 327437, 327543, 326 83, 330255, 330264, 323315, G06F 326, H03F 345

Patent

active

058942360

ABSTRACT:
An output circuit includes: a constant voltage source; a first transistor of a first-conductivity type having a gate connected to the constant voltage source; a second transistor of a second-conductivity type that is opposite to the first conductivity type, having a source connected to a source of the first transistor and a gate connected to a circuit input terminal; a third transistor of the first-conductivity type having a drain connected to a circuit output terminal and a gate connected to the circuit input terminal; a current-current converter circuit for outputting current proportional to drain current of the second transistor to the circuit output terminal; and a voltage supply for supplying an output voltage to and operating the first to third transistors and the current-current converter circuit. Here, an output current of the current-current converter circuit and a drain current of the third transistor can be determined according to the output voltage of the constant voltage source in a steady state.

REFERENCES:
patent: 4736117 (1988-04-01), Wieser
patent: 4893090 (1990-01-01), Boudewijns
patent: 5057789 (1991-10-01), Nagaraj
patent: 5113148 (1992-05-01), Theus
patent: 5444413 (1995-08-01), Kimura et al.
patent: 5469080 (1995-11-01), Son
patent: 5515006 (1996-05-01), Chan

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