Accurate Measurement of the RMS Value by Means of an Analog Multiplier-based RMS-to-DC Converter |
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| Daniel Belega, Robert Pazsitka, Dan Stoiciu |
- Abstract:
- This paper investigates the influence of the accuracy of the op-amp used by the square root circuit on the accuracy of the root mean square (rms) measurement achieved by means of an analog multiplier-based rms-to-dc converter implemented using the direct method. The rms measurement accuracy achieved using the internal op-amp of the multiplier is compared through experimental results with that achieved using more accurate op-amps, namely TL082 and OPA277. The analyzed rms-to-dc converter is implemented using the Texas Instruments Analog System Lab Kit (ASLK) PRO board equipped with MPY64 analog multipliers. The experimental data are obtained by means of a dedicated experimental setup.
- Keywords:
- analog multiplier, error analysis, op-amp, rms-to-dc converter
- Download:
- IMEKO-TC4-2017-068.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- TC4 Symposium 2017
- Title:
22nd IMEKO TC4 Symposium and 20th International Workshop on ADC Modelling and Testing
"Supporting world development through electric&electronic measurements"- Place:
- Iasi, ROMANIA
- Time:
- 14 September 2017 - 15 September 2017