Voltage/current measuring unit and method
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United States of America Patent
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Nov 26, 1996
Issued Date -
N/A
app pub date -
Apr 11, 1996
filing date -
Feb 27, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
A voltage/current measuring unit includes a signal generating source having a digital error detecting unit and a digital-to-analog converter (DAC) connected in series, a current measuring resistor having first and second terminals respectively connected to an output terminal of the signal generating source and a connection terminal, a voltage measuring circuit connected to the digital error detecting unit for measuring a voltage at said second terminal of the current measuring resistor and for providing a voltage feedback signal to the signal generating source, a current measuring circuit connected to the digital error detecting unit for measuring a voltage across the first and second terminals of the current measuring resistor, and for providing a current feedback signal to said signal generating source, the voltage measuring circuit and current measuring circuit both include analog-to-digital converters for respectively converting a voltage appearing at the second terminal of the current measuring resistor and a voltage appearing across the first and second terminals of the current measuring resistor into digital voltage values that are fed to the signal generating source.
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