Bias current reference circuit

Details Bias current reference circuit Bias current reference circuit

1980-11-17

1982-08-03

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307304, 323315, G05F 316, H03L 100, H03L 500

Patent

active

043429262

ABSTRACT:
A bias current reference circuit is disclosed having a diode-connected bipolar device connected in series with an MOS device to develop a reference voltage which is proportional to a bias current. The reference voltage is used by an MOS device connected in series with a resistor to develop a reference current which is proportional to the reference voltage. The reference current is used by a diode-connected MOS device to develop a bias voltage which is proportional to the reference current. The bias voltage in turn is used by another MOS device to develop the bias current in proportion to the bias voltage. The bias voltage is also used by other MOS devices to provide similar bias currents. In the disclosed embodiment, such a bias current is used by a complementary diode-connected MOS device to develop a complementary bias voltage. The complementary bias voltage may be used to develop start-up bias current in the event the bias current reference circuit fails to provide a suitable bias voltage.

REFERENCES:
patent: 3806742 (1974-04-01), Powell
patent: 3823332 (1974-07-01), Feryszka et al.
patent: 4032839 (1977-06-01), Ahmed
patent: 4096430 (1978-06-01), Waldron
patent: 4135125 (1979-01-01), Oura
patent: 4281261 (1981-07-01), Adam
patent: 4300091 (1981-11-01), Schade, Jr.
patent: 4302718 (1981-11-01), Schade, Jr.
Gray et al., Analysis and Design of Analog Integrated Circuits; pp. 239-261; John Wiley & Sons, 1977.

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