The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2008
Filed:
Jan. 11, 2007
Neng-tze Yang, Hermosa Beach, CA (US);
Neng-Tze Yang, Hermosa Beach, CA (US);
SiRF Technology, Inc., San Jose, CA (US);
Abstract
A method and a low noise amplifier are provided such that the low noise amplifier has a power dissipation that is adaptive to the noise interference levels. The low noise amplifer includes (i) first, second and third differential amplifiers connected in series each having a terminal for receiving a power supply current; and (ii) first and second switches responsive to a control signal, the first and second switches configured such that, (a) when the control signal is in a first state, the first switch and the second switch enable independent currents to flow in the terminals for receiving a power supply current; and (b) otherwise, the first switch and the second switch enable the terminal for receiving a power supply current of the second differential amplifier to reuse a current provided to the terminal for receiving a power supply current of the third differential amplifier. The control signal is provided by a radio frequency noise power detector, which senses an output signal of the low noise amplifier.