The Ukrainian state standard of the unit of high-frequency voltage

Pavlenko, Yu. F.; Ogar, V. I.; Klimashevskii, V. S.

doi:10.1007/s11018-007-0130-3

Cited by 1 publication

(1 citation statement)

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“…The thermal energy is sensed by a temperature sensor directly attached to the resistor ͑heater͒. [26][27][28] Although thermal converters are appropriate to measure rf voltage more accurately, still, they are particularly developed to measure lower voltages ͑less than 5 V͒ and offer low input impedance. 24,25 The range of measurement is increased by using a series resistance of suitable value and appropriate tolerance.…”

Section: Introductionmentioning

confidence: 99%

Primary measurement of total ultrasonic power with improved accuracy in rf voltage measurement

Dubey

Kumar

et al. 2010

Review of Scientific Instruments

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Out of the various existing ultrasonic power measurement techniques, the radiation force balance method using microbalance is most widely used in low power ͑below 1 W͒ regime. The major source of uncertainty associated with this technique is the error in ac voltage measurement applied to the transducer for the generation of ultrasonic waves. The sources that deteriorate the ac voltage measurement accuracy include cable length and impedance mismatch. We introduce a new differential peak to peak measurement approach to reduce the ac voltage measurement error. The method holds the average peak amplitude of each polarity. Ultralow offset difference amplifier is used to measure peak to peak voltage. The method is insensitive to the variations in the dc offset of the source. The functionality of this method has been tested and compared with the conventional rf voltage measurement method. The output of this proposed technique is dc, which can be measured with an error of less than 0.1%.

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