Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-04-02
1998-09-01
Cunningham, Terry
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327513, 327538, 327546, H03K 302
Patent
active
058015841
ABSTRACT:
The gate terminal of a FET is supplied with a bias voltage from a gate biasing circuit and a fluctuation in voltage V.sub.CS applied to a constant-current circuit is detected by a voltage-fluctuation detector. A gate-bias controller controls the gate biasing circuit to lower the gate bias voltage in a case where the fluctuation in voltage V.sub.CS has changed in an increasing direction, and to raise the gate bias voltage in a case where the fluctuation in voltage V.sub.CS has changed in the decreasing direction. Further, there are provided a plurality of constant-current sources having respective FETs and biasing circuits for setting a prescribed power-supply voltage characteristic and a prescribed temperature characteristic. A constant-current circuit is constructed by parallel-connecting the FETs in the plurality of constant-current sources through the drains and sources thereof.
REFERENCES:
patent: 4399374 (1983-08-01), Boeke
patent: 4532443 (1985-07-01), Glennon
patent: 4945259 (1990-07-01), Anderson
patent: 5138479 (1992-08-01), Behagel et al.
patent: 5247209 (1993-09-01), Cheng
patent: 5440277 (1995-08-01), Ewen et al.
patent: 5552744 (1996-09-01), Burlison et al.
IBM Technical Disclosure Bulletin--"Wide-Temperature-Range Current-Source Generator", Apr. 1987, pp. 5096-5097.
Cunningham Terry
Fujitsu Limited
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