Amplifier having switchable negative feedback

Amplifiers – With semiconductor amplifying device – Including differential amplifier

Reexamination Certificate

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C330S282000

Reexamination Certificate

active

07417506

ABSTRACT:
An amplifier having programmable amplification includes a transistor circuit having a plurality of negative feedback resistors, a switch being associated to a negative feedback resistor such that the negative feedback resistors of the transistor circuit can be activated and deactivated selectively by operating switches via a controller. Thus, a broadband amplifier having a high linearity can be implemented.

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First Office Action issued in Chinese Patent Application No. 200510009078.0 received on May 16, 2008 (including English translation).

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