Circuit arrangement for controlling the level of electrical sign

Details Circuit arrangement for controlling the level of electrical sign Circuit arrangement for controlling the level of electrical sign

1990-08-29

1991-08-13

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307491, 307494, 307497, 307359, 307264, 307572, G06G 712, H03K 5153, H03K 17687, H03L 500

Patent

active

050398873

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.

REFERENCES:
patent: 4258275 (1981-03-01), Ebihara
patent: 4763028 (1988-08-01), Henry
patent: 4883987 (1989-11-01), Fattaruso

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