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Abstract

Analog electrical signals are converted to digital form by analog to digital sampling in accordance with a variable successive approximation technique that permits extremely wide dynamic range coupled simultaneously with extremely high bandwidth capabilities, low power consumption, and low cost. Each of multiple data (sample) points of the input analog signal are digitally compared to a variable reference generated according to the successive approximation process and changeable modes of that process so as to permit optimum efficiency of conversion at varying rates of acquisition of the input signal. Variable conversion resolutions, gain, and offset settings are offered without resort to amplifiers, AC coupling, or settable attenuators, and applications for this conversion circuitry and method are described including oscillography, time-domain reflectometry, device and network characterization, telephony, video systems, data logging, equipment self-testing, device and process monitoring and control, spectrum analysis, and logic analysis.

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First Claim