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:
Feb. 13, 2007
Filed:
Aug. 13, 2004
Lawrence E. Connell, Naperville, IL (US);
Yan Cui, Gurnee, IL (US);
Poojan A. Wagh, Sleepy Hollow, IL (US);
Patrick L. Rakers, Kildeer, IL (US);
Lawrence E. Connell, Naperville, IL (US);
Yan Cui, Gurnee, IL (US);
Poojan A. Wagh, Sleepy Hollow, IL (US);
Patrick L. Rakers, Kildeer, IL (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
Method and apparatus are provided for high linearity and low noise communication signal mixing. The apparatus includes a high linearity low noise mixer having an input stage coupled to a switch stage by a series-coupled blocking capacitance and input resistance. The input stage includes a buffer with negative feedback, and the switch stage includes a transistor based switch network connected to an amplifier that has feedback resistance and shunting capacitance. The method includes AC coupling an RF signal, increasing a gain of the RF signal, reducing third-order distortion by negatively feeding-back the RF signal, blocking IM2 generated from said gain increasing step, increasing a second-order input intercept point (IIP2) by attenuating the RF signal across a resistance, and applying a local oscillator input to the RF signal.