Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1985-10-15
1987-04-21
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330258, 330260, 324123R, 324123C, H03F 345
Patent
active
046599975
ABSTRACT:
Apparatus for measuring the difference between two voltages in which a first current proportional to the voltage difference is generated at a first point, and there is circuitry for delivering at a second point a second current that is based on the first current and is indicative of the voltage difference; the circuitry includes an uninterrupted current path from the first point to the second point and the current path has a circuit element across which at least a portion of the common mode voltage appears; and the circuit element provides an output current to the path which is independent of the voltage across the circuit element.
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Burns, Jr. Roger V.
Ferland Michael R.
Whealler, Jr. J. Anson
Mullins James B.
Teradyne, Inc.
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