Ultra fast, low noise operational amplifier with dynamic...

Details Ultra fast, low noise operational amplifier with dynamic... Ultra fast, low noise operational amplifier with dynamic...

2006-11-14

2006-11-14

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S263000, C330S267000

Reexamination Certificate

active

07135927

ABSTRACT:
The present invention achieves technical advantages as an operational amplifier (30) having both a high slew rate and a full power bandwidth with low distortion by providing resistors (R6, R7, R9, R10) in place of active loads coupled to a differential pair (Q22, Q25, and Q23, Q24) of transistors in a folded cascode input stage (34). By utilizing passive resistors instead of active loads, no saturation occurs during high slew rate signals. The present invention achieves technical advantages of higher slew rate and lower noise without sacrificing power consumption.

REFERENCES:
patent: 5323121 (1994-06-01), Butler
patent: 5512859 (1996-04-01), Moraveji
patent: 6542032 (2003-04-01), Escobar-Bowser et al.
patent: 6710654 (2004-03-01), Parkhurst et al.
patent: 6710655 (2004-03-01), Parkhurst et al.

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