Differential amplifier circuit

Details Differential amplifier circuit Differential amplifier circuit

2006-04-04

2006-04-04

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

Reexamination Certificate

active

07023276

ABSTRACT:
A differential amplifier circuit has two input transistors, a load element, and a current source. A terminal for an input voltage is connected to a control terminal of a first input transistor. A terminal for a reference voltage is connected to a control terminal of a second input transistor. The two input transistors are connected in parallel between the load element and a terminal of the current source. A terminal for an internal reference potential is connected to a further terminal of the current source. A regulating circuit, is connected to the terminal for the voltage and to the terminal for the reference potential, and regulates the potential of the circuit dependent on changes in the reference voltage. Fluctuations of the reference voltage are compensated by regulation of the internal reference potential. As a result, the operating point of the circuit is stabilized independently of fluctuations of the reference voltage.

REFERENCES:
patent: 3497824 (1970-02-01), Goordman
patent: 4442408 (1984-04-01), Le
patent: 5115206 (1992-05-01), Mack et al.

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