Current source arrangement having a precision current-mirror cir

Details Current source arrangement having a precision current-mirror cir Current source arrangement having a precision current-mirror cir

1984-01-25

1986-02-25

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

340347M, 340347CC, G05F 320, H03K 1302

Patent

active

045730059

ABSTRACT:
In a digital-to-analog converter (1) a plurality of binary weighted currents are generated, which currents must be in an accurate current ratio relative to each other. By means of a coupling network (15) which is controlled by a control circuit (17), a plurality of currents from said digital-to-analog converter (1) can be coupled to a precision current-mirror circuit (25) in accordance with a cyclic pattern, this allowing deviations in the ratios of the currents from the digital-to-analog converter (1) to be detected by detection means (80) which control correction means (18.2 to 18.16) by means of which the currents from the digital-to-analog converter (1) are corrected so as to reduce the detected deviations.

REFERENCES:
patent: 3982172 (1976-09-01), van de Plassche
patent: 4034366 (1977-07-01), Memishian, Jr.
patent: 4125803 (1978-11-01), van de Plassche
patent: 4282515 (1981-08-01), Patterson, III
patent: 4442399 (1984-04-01), Nagano
Maio et al, "Untrimmed D/A Converter with 14-Bit Resolution", IEEE J. Solid State Circuits, vol. SC-16, No. 6, Dec. '81, pp. 616-620.

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