Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit
Patent
1992-09-11
1995-08-22
Wolfe, Willis R.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Nonlinear amplifying circuit
327563, H03K 524, H03K 1704
Patent
active
054444136
ABSTRACT:
An operational amplifier circuit includes a differential amplifier having an inverting input, a non-inverting input, and first and second outputs. The differential amplifier is fed by a current source coupled to a power supply voltage. An active load circuit is coupled to the first and second outputs of the differential amplifier and to a ground potential. An additional transistor is provided having a first current-carrying electrode coupled to the first output of the differential amplifier, a second current-carrying electrode coupled to the active load circuit, and an insulated gate electrode coupled to the active load circuit and the second output of the differential amplifier. An inversion amplifier has an input coupled to the second current-carrying electrode of the transistor, and an output, which is fed back through a compensation capacitor to the first output of the differential amplifier.
REFERENCES:
patent: 4987379 (1991-01-01), Hughes
patent: 5162749 (1992-11-01), Kobayashi
patent: 5311071 (1994-05-01), Ueda
IEEE Journal of Solid-State Circuits, vol. SC-18, No. 6, Dec. 1983, pp. 629-633, B. Ahuja, "An Improved Frequency Compensation Technique for CMOS Operational Amplifiers".
IEEE Journal of Solid-State Circuits, vol. SC-19, No. 6, Dec. 1984, pp. 919-925, D. Ribner, et al., "Design Technique for Cascoded CMOS OP Amps with Improved PSRR and Common-Mode Input Range".
Itakura Tetsuro
Kimura Tomohisa
Kabushiki Kaisha Toshiba
Wolfe Willis R.
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