Method and apparatus for compensating an amplifier

Details Method and apparatus for compensating an amplifier Method and apparatus for compensating an amplifier

2005-08-02

2005-08-02

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S261000

Reexamination Certificate

active

06924701

ABSTRACT:
A method and apparatus for compensating an amplifier is disclosed which significantly improves the unity gain bandwidth of the amplifier. In an embodiment of the invention the amplifier includes at least one compensated pair of cascode coupled transistors including: an input transistor, a cascode transistor, and a bypass element. The input transistor exhibits a first transition frequency. The cascode transistor is cascode coupled to the input transistor. The cascode transistor exhibits a second transition frequency less than or equal to the first transition frequency of the input transistor. The bypass element couples across a corresponding current interface of the cascode transistor to substantially bypass the cascode transistor at a pole frequency thereof.

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patent: 6388521 (2002-05-01), Henry
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patent: 0 824 783 (2002-04-01), None
patent: 1 081 573 (2003-09-01), None

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