Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Self-calibration
Patent
1990-12-19
1992-07-21
Wieder, Kenneth A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Self-calibration
324111, 307 4, 330 9, G01R 102
Patent
active
051326094
ABSTRACT:
A measurement circuit for measuring the level of an input electrical signal, the circuit comprising an input amplifier biased from a bias voltage, receiving the input signal, and producing an output signal, followed by a detector module itself followed by an integrator delivering an integration signal, these three components constituting a measurement channel, the integration signal being the sum of an offset signal and of a level signal which is proportional to the level of the input signal. The measurement circuit further includes a generator producing a reference voltage, a compensation module receiving the reference voltage and producing a compensation signal, and a differential measurement amplifier receiving the integration signal and the compensation signal and producing a measurement signal, wherein the bias voltage is constituted by the reference voltage, and wherein the compensation module comprises stages corresponding to the components of the measurement channel for conveying the reference voltage through conditions that match the conditions of the measurement channel, thereby producing, in particular, a correction signal having the same value as the offset signal, the correction signal being included in the compensation signal.
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Alcatel Cit
Burns William J.
Wieder Kenneth A.
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