Digital-to-analog converter

Details Digital-to-analog converter Digital-to-analog converter

H - Electricity

03

M

354/97

H03M 1/00 (2006.01)

Patent

CA 1176375

38/S01527 S81P263 DIGITAL-TO-ANALOG CONVERTER ABSTRACT OF THE DISCLOSURE An integrating digital-to-analog converter circuit includes an operational-amplifier based integrator, a plurality of constant current sources each providing constant current at a respective different level, and a plurality of switches each associated with a respective current source for coupling the same to the integrator. A plurality of digital counters are arranged to hold a predetermined portion of an n-bit digital word loaded therein and to count clock pulses until their contents reach a predetermined count. At those times, a carry pulse is generated in each such digital counter and the associated switch is opened to cut off the associated current source. Such a digital-to-analog converter circuit can convert data words of relatively high bit length without the need for an excessively high frequency clocking signal. -i-

392101

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