Amplifier with active inductor

Details Amplifier with active inductor Amplifier with active inductor

2008-02-28

2009-08-11

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C333S214000

Reexamination Certificate

active

07573332

ABSTRACT:
An amplifier comprises an amplifier stage and an active inductor. The amplifier stage has an input terminal and an output terminal. The active inductor comprises first and second resistors and first and second transistors. The first resistor has a first terminal coupled to the output terminal of the amplifier stage, and a second terminal. The second resistor has a first terminal coupled to the output terminal of the amplifier stage, and a second terminal. The first transistor has a first current electrode coupled to the second terminal of the first resistor, a control electrode coupled to receive a bias voltage, and a second current electrode. The second transistor has a first current electrode coupled to the second current electrode of the first transistor, a control electrode coupled to the second terminal of the second resistor, and a second current electrode coupled to a first power supply voltage terminal.

REFERENCES:
patent: 5726613 (1998-03-01), Hayashi et al.
patent: 6784749 (2004-08-01), Cove
patent: 7253707 (2007-08-01), Mukhopadhy et al.
patent: 7308241 (2007-12-01), Shimada et al.
patent: 2009/0074048 (2009-03-01), Amin et al.

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