Multi-band amplifier

Details Multi-band amplifier Multi-band amplifier

2005-06-21

2005-06-21

Nguyen, Patricia (Department: 2817)

Amplifiers

With plural amplifier channels

Amplifying different frequencies in different channels

C330S252000, C330S12400D

Reexamination Certificate

active

06909325

ABSTRACT:
In a multi-band amplifier, provided are a first differential voltage-to-current converting circuit for converting a first frequency signal into a current and outputting the current, a second differential voltage-to-current converting circuit for converting a second frequency signal into a current and outputting the current, and a current transposition point connected in phase with and in parallel with output terminals of the first and second differential voltage-to-current converting circuits. A base-grounded amplifying circuit is connected in phase with and in series with an output terminal of the current transposition point. With this configuration, the circuit of a virtual ground point and the following of after voltage-to-current conversion can be provided in common by using a cascode amplifier as a low-noise amplifier, making it possible to constitute a multi-band amplifier minimized in the connection loss resulting from interconnection.

REFERENCES:
patent: 4220974 (1980-09-01), Craft
patent: 5339458 (1994-08-01), Nakatsuka et al.
patent: 5715532 (1998-02-01), Sagawa et al.
patent: 6496545 (2002-12-01), Liu
patent: 2005/0005296 (2005-01-01), Bargroff et al.
patent: 2000-124829 (2000-04-01), None

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