Field effect transistor current source

Details Field effect transistor current source Field effect transistor current source

1979-08-13

1981-09-01

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307310, 323315, 323907, 357 51, H03K 301, H03K 326

Patent

active

042874386

ABSTRACT:
A current supply circuit is disclosed having a field effect transistor and negative feedback for degenerating the magnitude of the current supplied thereby. The negative feedback can be provided by a diffused resistor connected between the gate and source electrodes of the current supply field effect transistor. A differential amplifier which includes a pair of differentially coupled amplifying field effect transistors is coupled to the current supply circuit. The negative feedback enables the current supply device to provide a current which compensates the differentially coupled field effect transistors over processing while not deleteriously affecting the temperature characteristics thereof. A bipolar diode and a bipolar transistor can be included in the current supply for enabling the resistor to take up less chip area and for allowing more flexibility in the design of the geometry of the current supply, field effect transistor.

REFERENCES:
patent: 3303413 (1967-02-01), Warner, Jr. et al.
patent: 4053915 (1977-10-01), Dave
patent: 4207537 (1980-06-01), Cave et al.

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