Circuit arrangement for controlling the level of electrical signals
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United States of America Patent
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Aug 13, 1991
Grant Date -
N/A
app pub date -
Aug 29, 1990
filing date -
Aug 31, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For controlling the level of electrical signals a circuit arrangement is formed with two series connected amplifiers. A first amplifier containing a first variable resistor, operates at maximum amplification when a low input signal level is received. A second amplifier comprises a series connection of a second variable resistor and a current-controlled voltage source with two complementary outputs. The outputs of the voltage source are connected to a comparator and a controller with two separate outputs. One of the controller outputs transmits a control signal while the other output simultaneously transmits a blocking signal. A first output of the controller is connected with the first variable resistor, while a second output of the controller is connected to the second variable resistor.
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