Abstract
Time division multiplier was widely used in high-precision industrial frequency AC power measurements.The poor stability of zero point was caused by the switch leakage and amplifier offset voltage. Based on the experimental study of the time division multiplier circuit designed in the article, the mathematical model of zero point compensation was established, and then the appropriate calibration method was proposed. Considered the amplifier offset voltage, the error model of the time division multiplier was analyzed and the error expression was obtained. These can provide theoretical guidance for choosing amplifiers of the no-beat time division multiplier.
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