Amplification circuit with improved linearity

Details Amplification circuit with improved linearity Amplification circuit with improved linearity

1990-10-29

1991-11-12

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

307494, 307529, H03F 345

Patent

active

050651129

ABSTRACT:
An amplification circuit including a differential amplifier is disclosed. An npn transistor portion of the differential amplifier has its base provided with negative feed back, the base potential is brought to a constant potential, i.e. a virtual ground potential. The voltage between the base and emitter of the transistor is thus kept constant, and the internal resistance of the emitter does not change in accordance with the change of the emitter current. As a result, since the transistor responds only to an input signal current converted by a resistor and operates, the linearity between the input and the output of the differential amplifier is improved.

REFERENCES:
patent: 4568840 (1986-02-01), Kenji
patent: 4694204 (1987-09-01), Nishijima et al.

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