Relayless voltage measurement in automatic test equipment
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United States of America Patent
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Feb 27, 2001
Grant Date -
N/A
app pub date -
Jun 24, 1998
filing date -
Jun 24, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A tester that is capable of performing voltage measurements on electronic circuits is disclosed. The tester includes voltage measurement circuitry with an input, a plurality of gain stages, and switching circuitry coupled between the input and the gain stages. The switching circuitry includes a plurality of diodes, and a portion of the gain stages includes current-to-voltage converters. Each diode is coupled to a respective current-to-voltage converter. By applying different bias voltages to the respective current-to-voltage converters, the diodes can be made to conduct current for different ranges of voltages at the input. The output of each current-to-voltage converter is proportional to a respective voltage range.
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