Fully differential amplifier with start up circuit

Details Fully differential amplifier with start up circuit Fully differential amplifier with start up circuit

2006-10-31

2006-10-31

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S253000

Reexamination Certificate

active

07129782

ABSTRACT:
A fully differential amplifier having a start-up circuit is described. The fully differential amplifier may be a two-stage amplifier with a start-up circuit coupled between the stages. The start-up circuit may include a sense circuit coupled between a common mode input and internal nodes that are connect to output transistors of the fully differential amplifier. The sense circuit produces a reset signal that forces the fully differential amplifier into a mode of operation.

REFERENCES:
patent: 5838199 (1998-11-01), Nakamura
patent: 6265941 (2001-07-01), Lopata
patent: 6445216 (2002-09-01), Bruneau et al.
patent: 6833759 (2004-12-01), Sobel
Gonggui Xu and Sherif H.K. Embabi, “A Systematic Approach in Constructing Fully Differential Amplifiers”, IEEE Transactions on Circuits and Systems-II: Analog and Digital Signal Processing, vol. 47, No. 11, Nov. 2000, pp. 1343-1347.
J.F. Duque-Carrillo, “Continuous-time common-mode feedback networks for fully-differential amplifiers: a compartive study”, 1993 IEEE, pp. 1267-1270.

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