Charge-pump glitch filter

Details Charge-pump glitch filter Charge-pump glitch filter

H - Electricity

03

M

354/97

H03M 1/00 (2006.01)

Patent

CA 1181863

-17- Abstract of the Disclosure A circuit including a conventional digital-to- analog converter (DAC) and a charge pump for producing an analog representation of an input waveform defined by an input digital bit stream, the analog representa- tion being relatively free of spurious aberrations usually present in the output of a conventional DAC. The charge pump and an associated integrator are used to produce a first approximation of the input waveform and the DAC and an associated detuned slew-rate filter are used to maintain the first approximation in long- term conformance with a more accurate second approxima- tion. Spurious aberrations in the second approximation are integrated over several steps of the input bit stream, thereby minimizing their adverse impact on the relatively true first approximation.

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