Band limiter with temperature compensation circuit

Details Band limiter with temperature compensation circuit Band limiter with temperature compensation circuit

1991-10-17

1992-11-10

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330303, 330305, 330306, H03F 345

Patent

active

051627507

ABSTRACT:
A band limiter connected between output lines of a differential amplifier. The band limiter includes a bipolar transistor connected to the output lines via capacitors, and includes a temperature detecting device for detecting ambient temperature. Transistor capacitance is connected to or disconnected from the output lines in response to a bandwidth limiting signal. The transistor constitutes a low-pass filter functioning as a band limiter when it is closed, whereas it functions as a variable capacitor which varies its capacitance in accordance with the ambient temperature when it is opened. The high-band frequency characteristic of the differential amplifier is temperature compensated by the transistor functioning as a variable capacitance.

REFERENCES:
patent: 4782305 (1988-11-01), Westwick et al.

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