Fully-differential amplifier

Details Fully-differential amplifier Fully-differential amplifier

2007-06-18

2009-11-17

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S258000

Reexamination Certificate

active

07619473

ABSTRACT:
A fully-differential amplifier able to operate at a low power supply voltage and provided with a common-mode signal suppression function is disclosed. This fully-differential amplifier is provided with a first fully-differential amplifier configured by a single-stage configuration inverting amplifier and canceling out the common-mode signal of the input side by a feedforward means and a second fully-differential amplifier configured by a single-stage configuration inverting amplifier and canceling out the common-mode signal of the output side by a feedback means, the output of the first fully-differential amplifier being connected to the input of the second fully-differential amplifier.

REFERENCES:
patent: 7009448 (2006-03-01), Itakura et al.
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patent: 2004-007362 (2004-01-01), None
patent: 2004-304426 (2004-10-01), None
patent: 2005-109983 (2005-04-01), None
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Ahmed Nader Mohieldin et al., “A Fully Balanced Pseudo-Differential OTA With Common-Mode Feedfoward and Inherent Common-Mode Feedback Detector”, IEEE Journal of Solid-State Circuits, vol. 38, No. 4, pp. 663-668, Apr. 2003.
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Japanese Office Action issued on Jan. 6, 2009 in corresponding Japanese Patent Application, 2006-336928.
Japanese Office Action dated Aug. 4, 2009 issued in priority Japanese Application No. 2006-336928.

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