Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2008-03-13
2009-10-20
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
Reexamination Certificate
active
07605654
ABSTRACT:
A telescopic operational amplifier including a current source, an input stage, and a load stage is provided. The input stage is coupled to the current source and includes a group of input transistors for receiving an input voltage. The load stage is coupled to the input stage and includes a group of load transistors for outputting an output voltage. The threshold voltages of the group of input transistors are larger than that of the group of load transistors.
REFERENCES:
patent: 6833760 (2004-12-01), Aude
patent: 7224224 (2007-05-01), Sera et al.
patent: 7432762 (2008-10-01), Bhattacharya et al.
Li Hung-Sung
Yen Yung-Chih
Mediatek Inc.
Nguyen Khiem D
Pascal Robert
Thomas Kayden Horstemeyer & Risley
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