Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1994-01-27
1996-01-02
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330261, H03F 345
Patent
active
054812240
ABSTRACT:
A differential amplifier circuit having a superior transconductance linearity within a wider input voltage range, which includes a first differential pair of transistors and a driver circuit for driving the differential pair by its output current. This output current has a square-law characteristic to compensate in nonlinearity the transconductance of the differential pair. The driver circuit is a squarer or a quadritail circuit. A signal to be amplified is applied to a pair of input terminals. Input ends of the differential pair are connected to a pair of input terminals to be applied with a first input signal. Input ends of the driver circuit is connected to the pair of input terminals to be applied with a second input signal. The first and second input signals are proportional in amplitude to the signal to be amplified.
REFERENCES:
patent: 5079515 (1992-01-01), Tanimoto
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Wang et al., "A voltage-Controllable Linear MOS Transconductor Using Bias Offest Technique", IEEE Journal of Solid-State Circuits, vol. 25, No. 1, Feb. 1990, pp. 315-317.
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Mullins James B.
NEC Corporation
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