Amplifiers – With semiconductor amplifying device – Including temperature compensation means
Patent
1997-12-18
1999-11-02
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including temperature compensation means
327513, 330296, 330277, 330307, H03F 130
Patent
active
059778326
ABSTRACT:
A method of biasing an MOS IC includes the steps of providing the IC with two MOS transistors having substantially similar characteristics and maintaining these two transistors at different temperatures. During operation of the IC, an output voltage is generated from each of the two transistors, and a bias voltage is generated as a function of the difference between the two output voltages. This bias voltage is then fed back to the gate terminals of the two MOS transistors to set the bias voltage to a steady-state level at which the circuit will operate at a zero temperature coefficient point. This bias voltage is also coupled to the gate electrodes of other transistors within the IC, to operate these transistors at the zero temperature coefficient point. An IC operated in accordance with biasing method will exhibit superior stability with variations in ambient temperature.
REFERENCES:
patent: 3882728 (1975-05-01), Wittinger
Gogna Pawan
Satyanarayana Srinagesh
Biren Steven R.
Mullins James B.
Philips Electronics North America Corporation
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