| 摘要 |
Digital measuring apparatus employing automatic ranging analog to digital conversion circuitry. The ADC circuity stores a voltage ramp of slope proportional to the unknown input signal during one or more ranging intervals depending upon the slope, until a voltage level proportional to the magnitude of the input signal is reached. The number of ranging intervals employed is signalled by ranging pulses which indicate the decimal range of magnitudes of the input signal and are used to produce an appropriate decimal point display. A decimal number display is generated by accumulating a number of measuring pulses as the stored voltage level is discharged at a constant rate. The number of measuring pulses is equal to the decimal number magnitude of the stored level.
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