Linear transconductors

Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...

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323315, 363 73, G05F 316

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active

058251677

ABSTRACT:
An integrated transconductor circuit in which the input transistor(s) passes a current across a reference resistor. This conventional arrangement produces current error terms of Vbe/R and Ib. According to the present invention, these terms are compensated by providing a compensation resistor which is matched to the first resistor, and a compensation transistor which is matched to the input transistor, interconnected to feed the appropriate current components to the output. For even better compensation, an additional transistor is optionally added to remove the effect of base current of the compensation transistor. In differential embodiments, the compensation resistor may be bridged or split. Zero, one, or more stages of current mirroring can optionally be used to provide the desired output.

REFERENCES:
patent: 4330744 (1982-05-01), Embree et al.
patent: 4437023 (1984-03-01), Gill, Jr.
patent: 4550262 (1985-10-01), Kohsiek
patent: 4591780 (1986-05-01), Yamada et al.
patent: 4703249 (1987-10-01), De La Plaza et al.
patent: 4733196 (1988-03-01), Menniti et al.
patent: 4740766 (1988-04-01), Metz
patent: 4742292 (1988-05-01), Hoffman
patent: 4879505 (1989-11-01), Barrow et al.
patent: 4897596 (1990-01-01), Hughes
patent: 4970452 (1990-11-01), Barbu et al.
patent: 5038053 (1991-08-01), Djenguerian et al.
patent: 5173656 (1992-12-01), Seevinck et al.
patent: 5451859 (1995-09-01), Ryat
patent: 5684393 (1997-11-01), Ryat
Wang et al., "A voltage-controllable linear MOS transconductor using bias offset technique" 25 IEEE Journal of Solid-State Circuits, pp. 315-317 (Feb. 1990).
Van de Plassche, "A wide-band monolithic instrumentation amplifier" 10 IEEE Journal of Solid-State Circuits, 424-31 (Dec. 1975).
Pookaiylaudom et al., "An integratable precision voltage-to-current convertor with bilateral capability" 13 IEEE Journal of Solid-State Circuits, Jun. 1978.
Section 2.12 of Feucht, Handbook of Analog Circuit Design (1990).
Blauschild, An open loop programmable amplifier with extended frequency range 16 IEEE Journal of Solid-State Circuits, 626-33 (Dec. 1981).

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