High frequency amplifier

Details High frequency amplifier High frequency amplifier

2007-01-02

2007-01-02

Lee, Benny T. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including atomic particle or radiant energy impinging on a...

C330S084000, C330S085000

Reexamination Certificate

active

10983411

ABSTRACT:
A high frequency amplifier comprising a first trans-impedance amplifier, a second trans-impedance amplifier, a third amplifier, and a variant current source is provided. The first trans-impedance amplifier receives an input current and outputs a first output voltage accordingly. The second trans-impedance outputs a second voltage. The third amplifier receives the first and the second voltage. The variant current source is connected between the input terminal of the second trans-impedance and a ground terminal or a power supply source. The variant current source delivers a variant current to change the second voltage such that the second voltage may follow the first voltage. The input current flows into the first trans-impedance amplifier, while the variant current flows into the second trans-impedance amplifier. The input current flows out the first trans-impedance amplifier, while the variant current flows out the second trans-impedance amplifier.

REFERENCES:
patent: 6114913 (2000-09-01), Entrikin
patent: 6304357 (2001-10-01), Ohhata et al.
patent: 6323734 (2001-11-01), Henrion et al.
patent: 6658217 (2003-12-01), Ohhata et al.
patent: 2006/0001493 (2006-01-01), Harms et al.

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