Digital-to-analog converter with output sampler

Details Digital-to-analog converter with output sampler Digital-to-analog converter with output sampler

H - Electricity

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328/45, 354/97

H03M 1/06 (2006.01) H03K 5/02 (2006.01) H03K 17/693 (2006.01) H03M 1/00 (2006.01) H03M 1/66 (2006.01) H03M 1/74 (2006.01)

Patent

CA 1256215

Abstract A high speed monolithic current switching digital- to-analog converter (DAC) having a sampled output is provided. The DAC includes an output sampling circuit which is an on/off switch rather than a sample and hold circuit. Elimination of a holding capacitor results in faster switching and less error. The sampler is a differential, triple balanced architecture which steers the DAC's differential outputs alternately to a load resistor via a balancing transformer and to ground. The sampler includes a three-stage, AC coupled GaAs pre-amp which provides a complementary clock to drive the sampler.

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