Differential amplifying circuit

Details Differential amplifying circuit Differential amplifying circuit

1989-09-26

1991-02-12

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

307555, 307562, 307567, H03F 345

Patent

active

049927574

ABSTRACT:
A differential amplifying circuit comprises a differential pair of transistors for differentially amplifying input signals, and an output signal fixing transistor for fixing output signals to avoid the transmission of extraordinary input signals from input terminals to output terminals. The output signal fixing transistor is connected to one of the differential pair of the transistors which is thereby connected to the ground, where extraordinary input signals are supplied to the input terminals. A capacitor element such as a transistor having the same parasitic capacitance as the output signal fixing transistor is connected to the remaining one of the differential pair of the transistors, such that capacitances of the same value are loaded to the differential pair of the transistors. As a result, no offset occurs between the output signals, and wave forms of the output signals are equal to each other.

REFERENCES:
patent: 4284912 (1981-08-01), Fujisaki et al.

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