Reference potential generating circuits

Details Reference potential generating circuits Reference potential generating circuits

1980-05-27

1981-11-24

Shoop, William M.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323315, 307296R, 330288, G05F 316

Patent

active

043027180

ABSTRACT:
A reference potential generating circuit, suitable for use as an extrapolated band-gap reference potential generator, includes first and second transistors operated at different emitter current densities wherein the difference between their base-emitter offset potentials is applied to a first resistor connected between their respective bases. That difference potential is scaled up across a second resistor to provide a component of the reference potential. Current proportional to the collector current flow in the second transistor is generated and applied to the second resistor, the collector current of the second transistor being only a fraction of the current flow in the second resistor whereby the value of the second resistor is reduced. This generated current can be the current flowing between the collector and emitter electrodes of a third transistor connected emitter-to-emitter and base-to-base with the second transistor, for example.

REFERENCES:
patent: 3617859 (1971-11-01), Dobkin et al.
patent: 3714600 (1973-01-01), Kuijk
patent: 3851241 (1974-11-01), Wheatley, Jr.
patent: 3887863 (1975-06-01), Brokaw
patent: 4019071 (1977-04-01), Ahmed
patent: 4058760 (1977-11-01), Ahmed
patent: 4059793 (1977-11-01), Ahmed
patent: 4063149 (1977-12-01), Crowle
patent: 4172992 (1979-10-01), Culmer et al.
R. J. Widlar, "New Developments in IC Voltage Regulators", IEEE Journal of Solid-State Circuits, vol. SC-6, No. 1., Feb. 1971, pp. 2-7.
K. E. Kuijk, "A Precision Reference Voltage Source", IEEE Journal of Solid-State Circuits, vol. SC-8, No. 3, Jun. 1973, pp. 222-226.

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