Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1994-12-23
1996-01-23
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330107, 330294, H03F 345, H03F 134
Patent
active
054867908
ABSTRACT:
A high frequency amplifier circuit using hybrid nested Miller compensation (HNMC) as a means to frequency compensate amplifiers. The circuit comprises four amplifier stages, or any other even number higher than four. Each of the four stages can be inverting or balanced pair stages. The Miller compensation is provided by capacitors connected across the output and input of several of the stages, and with a third capacitor connected across the other stages. The HNMC circuit allows the use of lower supply voltages, consumes less supply power, and avoids the need to drive the output transistor with a differential stage. Other variations employ a multipath input stage, and opamps comprising 6 and 8 stages are also described.
REFERENCES:
patent: 4559502 (1985-12-01), Huijsing
patent: 4591805 (1986-05-01), Highton
patent: 5155447 (1992-10-01), Huijsing et al.
"A Programmable 1.5V CMOS Class-AB Operational Amplifier with Hybrid Nested Miller Compensation for 120 dB Gain and 6 MHz UGF" by Ruud G. H. Eschauzier, et al., IEEE Transaction of Solid Stte Circuits, vol. 29, No. 12, Dec. 1994.
"A CMOS Low-Distortion Fully Differential Power Amplifier with Double Nested Miller Compensation" by Sergio Pernici et al., IEEE Journal of Solid-State Circuits, vol. 28, No. 7, Jul. 1993, pp. 758-763.
"A Low-Output Impedance Fully Differential Op Amp with Large Output Swing and Continuous Time Common-Mode Feedback" IEEE Journal of Solid State Circuits, vol. 26, No. 12, Dec. 1991.
"A 100-MHz 100-db Operational Amplifier with Multipath Nested Miller Compensation Structure" R. Eschauzier et al., IEEE Journal of Solid-State Circuits, vol. 27, No. 12, Dec. 1992.
Eschauzier Rudolphe G. H.
Huijsing Johan H.
Biren Steven R.
Mullins James B.
Philips Electronics North America Corporation
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