Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2008-01-15
2011-11-29
Mottola, Steven J (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S257000
Reexamination Certificate
active
08067982
ABSTRACT:
The invention relates to a transconductance amplifier, intended to supply current variations di when it receives voltage variations dv, with a desired conversion coefficient Gm called transconductance: Gm=di/dv.The amplifier comprises a PMOS transistor (MP1) and an NMOS transistor (MP2) connected by their drains, their gates both being connected to the voltage input receiving dv; the source of the first transistor is connected to a constant current source (IB1) and to a resistor (R) and to the drain of a third MOS transistor (MN3) of the same type as the first; the sources of the second (MN2) and third (MN3) transistors are commoned, the gate of the third transistor being connected to the drains of the first and second; the output is connected to a circuit (MN4) which mirrors the current of the third transistor.The resulting amplifier has good linearity and can be used in a sample and hold device used to sample charges.
REFERENCES:
patent: 3984780 (1976-10-01), Hsiao et al.
patent: 4103190 (1978-07-01), Beutler
patent: 6150885 (2000-11-01), Ashby et al.
Kwan, Tom, Martin, Ken, An Adaptive Analog Continuous-Time CMOS Biquadratic Filter, Proceedings of the IEEE Custom Integrated Circuits Conference, 1991.
Kwan, Tom and Martin, Ken, An Adaptive Ananog Continuous-Time CMOS Biquadratic Filter, IEE Journal of Solid-State Circuits, vol. 26, No. 6, Jun. 1991.
Sedra, A.S., Roberts, G.W., Gohh, F. The Current Conveyor; History, Progress and New Results, IEE Proceedings, vol. 137, Pt. G, No. 2, Apr. 1990.
Commissariat a l''Energie Atomique
LaRiviere Grubman & Payne, LLP
Mottola Steven J
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