Variable electronic resistor having parallel phase-inverted variable semiconductor channels with common control input and current-to-voltage converters
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United States of America Patent
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Feb 17, 1998
Grant Date -
N/A
app pub date -
Jul 3, 1996
filing date -
Oct 22, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A variable electronic resistor (16), which can be varied by a control signal (Ust) at the control input (15), contains two parallel, signal paths (1 and 2) with identical components, of which one signal path carries a phase inverted input transmission signal and the other signal path carries a non phase inverted input transmission signal and which are additively joined at the output side. Each signal path contains a charge carrier channel (3) and a signal transmission stage (7) with a low impedance current input, located downstream of the output electrode (5) in the signal path of the charge carrier channel. The resistor of the charge carrier channel can be varied by a control voltage (Ust), which is common to both charge carrier channels, in a control electrode (14) of the semiconductor components (4).
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