G - Physics – 05 – F
Patent
G - Physics
05
F
323/4
G05F 3/20 (2006.01) G05F 3/26 (2006.01) H03M 1/00 (2006.01) H03M 1/68 (2006.01) H03M 1/74 (2006.01)
Patent
CA 1221409
ABSTRACT: In a digital-analogue converter (I) 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 con- trolled by a control circuit (17) a plurality of currents from said digital-analogue 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-analogue 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-analogue converter (1) are corrected so as to reduce the detected deviations.
446687
Fetherstonhaugh & Co.
N.v.philips'gloeilampenfabrieken
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