Method and system for a low noise amplifier with tolerance...

Details Method and system for a low noise amplifier with tolerance... Method and system for a low noise amplifier with tolerance...

2007-05-29

2009-06-30

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S253000

Reexamination Certificate

active

07554404

ABSTRACT:
Methods and systems for a low noise amplifier with tolerance to large inputs are disclosed. Aspects of one method may include providing an individual current source for each input transistor to a low noise amplifier (LNA), wherein the individual current sources may be isolated from each other when the LNA is turned off. The individual current sources may also form a common current source for the input transistors when the LNA is turned on. Accordingly, the input transistors to the LNA may float when the LNA is turned off, thereby coupling the input signal voltage to the source and drain terminals. The individual current sources may be isolated from each other by a coupling transistor that is turned off. When the LNA is turned on, the coupling transistor may be turned on to couple the individual current sources to each other to form the common current source for the input transistors.

REFERENCES:
patent: 6259321 (2001-07-01), Song et al.
patent: 6480064 (2002-11-01), Cyrusian
patent: 7034606 (2006-04-01), Caresosa et al.

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