Differential amplifier

Details Differential amplifier Differential amplifier

2005-12-23

2009-02-03

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S253000

Reexamination Certificate

active

07486140

ABSTRACT:
A differential amplifier of the present invention comprises transistors where to each of which one of two inputs to said differential amplifier is provided; current mirror circuits where each of which delivers one of the outputs of the differential amplifier to the load side; and cut-off prevention units where each of which is connected to the connecting point of a transistor to which a monitor current of one of the current mirror circuits flows, and one of the transistors to which the inputs are provided, and applies a current for preventing cutting off the transistor to which the monitor current flows, when the input to the transistor to which the input is provided is L.

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patent: 5162749 (1992-11-01), Kobayashi
patent: 6980054 (2005-12-01), Okada
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patent: 11-127042 (1999-05-01), None
patent: 2001-251149 (2001-09-01), None
patent: A-2001-339259 (2001-12-01), None
Behzad Razavi, “Design of Analog CMOS Integrated Circuits,” Basic, Mar. 2003, cover page and pp. 82-83, Maruzen.
Behzad Razavi, “Design of Analog CMOS Integrated Circuits,” Application, Mar. 2003, cover page and pp. 394-395, Maruzen.
JP-A-2005-023986, Notice of Rejection Grounds dated Jun. 6, 2008, English translation and Japanese language Notice.

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