Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1982-05-06
1986-05-27
Sloyan, T. J.
Communications: electrical
Audible indication
Percussion-type sound producer
323270, 340347CC, 340347M, H03K 1302
Patent
active
045918287
ABSTRACT:
A digital-to-analog converter includes a plurality of constant current sources and a calibration circuit for measuring the value or relative value of the current provided by one or more of the sources without interrupting operation of the digital-to-analog converter. The calibration circuit carries out a routine whereby a number of measurements are obtained and averaged. Error signals in accordance with the averaged measurements are produced and used to correct for drift in the components of the current sources. Error correction may be achieved by adjusting the regulators themselves or by adding correction signals at other parts of the circuit.
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Wittlinger, Linear Integrated Circuits, Application Note ICAN-6668, Applications of the CA3080 and CA3080A High-Performance Operational Transconductance Amplifiers, pp. 1-7.
Cambridge Consultants Limited
Sloyan T. J.
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