Voltage conversion circuit and differential difference amplifier

Amplifiers – With semiconductor amplifying device – Including differential amplifier

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330301, H03F 345

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active

060114363

ABSTRACT:
Two pairs of differential input voltages are converted into two pairs of differential voltages through voltage converters whose output voltages are determined only by the input voltage amplitudes. Of the two pairs of differential input voltages, a voltage across the positive terminals and a voltage across the negative terminals of the voltage converters are converted into two pairs of differential currents through voltage-to-current converters. An output voltage proportional to the difference between the two pairs of differential currents is obtained with improved linearity through a current-to-voltage converter.

REFERENCES:
patent: 4588956 (1986-05-01), de Corlieu et al.
patent: 4716380 (1987-12-01), Proebsting
patent: 5530403 (1996-06-01), Bushman et al.
patent: 5650753 (1997-07-01), Ling
Eduard Saeckinger, et al., IEEE Journal of Solid-State Circuits, vol. SC-22, No. 2, pp. 287-294, "A Versatile Building Block: The CMOS Differential Difference Amplifier", Apr. 1987.
Shu-Chuan Huang, et al., IEEE Transactions on Circuits and Systems-II, vol. 40, No. 5, pp. 289-301, "A Wide Range Differntial Difference Amplifer: A Basic Block for Signal Processing in MOS Technology", May 1993.

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