| 摘要 |
<p>A sampling circuit, particularly for sampling voltage and current amplitudes in an AC kWh meter, in which signals from transducers (1 and 2) representing the voltage and current amplitues respectively are selectively applied to an analogue-to-digital converter (4) by an analogue multiplexer (3) under the control of a processor (5) which varies the sequence in which the signals are applied to the converter. The processor performs calculations on values measured by the converter to derive the kWh.</p> |
