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:
Jun. 28, 2016
Filed:
Jul. 19, 2013
Rf Micro Devices, Inc., Greensboro, NC (US);
Jinhua Zhong, High Point, NC (US);
Daniel Charles Kerr, Oak Ridge, NC (US);
Kelvin Kai Tuan Yan, Oak Ridge, NC (US);
Brian Keith White, Greensboro, NC (US);
RF Micro Devices, Inc., Greensboro, NC (US);
Abstract
Radio frequency (RF) switching circuitry includes support circuitry for maintaining one or more RF switching elements in either an ON or OFF state. The support circuitry includes a negative charge pump adapted to quickly generate a negative voltage during a 'boost' mode of operation, and maintain the negative voltage during a normal mode of operation. The negative charge pump includes an oscillator adapted to generate a high frequency oscillating signal for driving the charge pump during the boost mode of operation and a low frequency oscillating signal for driving the charge pump during the normal mode of operation. By generating the high frequency oscillating signal only during a boost mode of operation, spurious noise coupled to the RF switch circuitry is minimized during a normal mode of operation.