Waveform shaper and sigma-delta D/A converter

Details Waveform shaper and sigma-delta D/A converter Waveform shaper and sigma-delta D/A converter

1998-10-13

2000-08-29

Phan, Trong

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341144, H03M 300

Patent

active

061115320

ABSTRACT:
There are provided a waveform shaper that shapes a waveform of a one-bit data signal obtained by subjecting an input data signal to sigma-delta modulation, to generate an output data signal, and a sigma-delta D/A converter incorporating the waveform shaper. A clock jitter-detecting device detects jitter of a clock signal used for generating the one-bit data signal and generates an error signal indicative of the detected jitter of the clock signal. An amplitude-adjusting device shapes the waveform of the one-bit data signal by using the clock signal, and adjusts amplitude of the shaped one-bit data signal in response to the error signal, to generate the output data signal.

REFERENCES:
patent: 4947171 (1990-08-01), Pfeifer et al.
patent: 5225835 (1993-07-01), Majima et al.

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