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:
Nov. 03, 2015
Filed:
Sep. 26, 2012
Broadcom Corporation, Irvine, CA (US);
Amir Hadji-Abdolhamid, Aliso Viejo, CA (US);
Janice Chiu, Tustin, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
An envelope detector (ED) includes a voltage-mode ED core including parallel detection transistors for detecting a voltage envelope of an RF signal input. The detection transistors are configured with a size and for a current such that the transistors are biased in subthreshold regions of operation. The ED core is configured to variably control a bias current through the detection transistors, where the bias current is varied according to a voltage amplitude of the RF signal input to enhance a linear range of the ED while detection transistors continue to operate in subthreshold regions. A linearizer circuit may be configured to control the bias current based on feedback inputs from ED outputs. Several gain-programmable voltage amplifiers, which may include a final specialized class-AB amplifier, precede the ED core, to adapt a transmitter output voltage to an input range of the ED core, which extends the linear range of the ED.