Electronic circuit biasing control system

Details Electronic circuit biasing control system Electronic circuit biasing control system

1998-03-23

2000-07-18

Shingleton, Michael B

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

330289, 330277, 330290, 330278, H03G 330

Patent

active

060913029

ABSTRACT:
A biasing and monitoring system for use with a circuit. The system comprises a biasing device, which is coupled to the circuit and which biases a circuit variable; and a monitoring device, which monitors a first indicator variable, and which comprises means for communicating information about the first indicator variable; and a controlling device. The controlling device controls the biasing device, receives information about the first indicator variable, is coupled to the biasing device and to the monitoring device, and comprises means for determining a desired value for the circuit variable.
The system can be implemented in an amplifier system comprising a field effect transistor ("FET"). The system biases the gate voltage of the FET so as to minimize the intermodulation products for any given value of temperature. The system uses a look-up table to determine the proper biasing voltage, and desired source current, for any given temperature.

REFERENCES:
patent: 5177453 (1993-01-01), Russell et al.
patent: 5488331 (1996-01-01), Keane et al.

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