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:
Sep. 16, 2014
Filed:
Jun. 24, 2011
Amir Hadji-abdolhamid, Aliso Viejo, CA (US);
Ahmad Mirzaei, San Diego, CA (US);
Hooman Darabi, Laguna Niguel, CA (US);
Amir Hadji-Abdolhamid, Aliso Viejo, CA (US);
Ahmad Mirzaei, San Diego, CA (US);
Hooman Darabi, Laguna Niguel, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
According to one embodiment, a high performance buffer for use in a communications system includes first and second differential blocks. Each of the first and second differential blocks comprise one or more driving transistors for generating a driving current for a load of the high performance buffer, and a feedback path for adjusting the operation of the one or more driving transistors. The feedback path includes a feedback transistor for receiving a common mode bias voltage, wherein the common mode bias voltage depends at least in part on a threshold voltage of the feedback transistor. The feedback path includes a programmable resistor and capacitor to reduce out of band loop gain and the noise. The high performance buffer is configured to achieve a high linearity, low output impedance, and low noise, and is suitable for use as a pre-mixer buffer in a wireless communications system.