Low voltage bias circuit

Details Low voltage bias circuit Low voltage bias circuit

1987-02-05

1989-05-23

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072961, 323312, 323315, H03K 301, G05F 304

Patent

active

048333441

ABSTRACT:
A bias circuit (FIG. 5) of the type comprising a bias transistor (T1) having a pair of resistors (R1, R2) in its collector path, the junction of these two resistors (R1 and R2) being connected to the transistor base. The base of a drive transistor (T2), of like polarity type, is connected to the collector of the bias transistor (T1), this serving as current source or sink. To provide and increase extended operation, operation at supply voltages lower than usual and current regulation from low supply voltage (0.9V) to much high voltage, this circuit is modified by the provision of a third resistor (R3) in the collector path and a diode shunt (T3) between the base of the drive transistor T2 and the junction of the third and first resistors (R3 and R1). The polarity inverse of this modified circuit is also effective and may be combined, in cascade or in ring feedback loop configuration, with the aforementioned modified circuit. These latter combinations serve to provide yet higher order current regulation.

REFERENCES:
patent: 3659121 (1972-04-01), Fredriksen
patent: 3660694 (1972-05-01), Lucas
patent: 3831040 (1974-08-01), Nanbat et al.
patent: 4059793 (1977-11-01), Ahmed
"Low Complexity Reference Voltage Generator", IBM Technical Disclosure Bulletin, H. Beranger et al., vol. 24, No. 7A, Dec. 1981.
Gheorghiu et al., Optimum Design of Two Cascaded Peaking Current Sources, Aug. 1981, IEEE J. of Solid State Circuits, vol. SC-16, No. 4, pp. 415-417.

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