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:
May. 22, 2012
Filed:
Nov. 24, 2008
Jonathan Wood, Sudbury, MA (US);
Timothy Krahn Trudeau, Roanoke, VA (US);
Jonathan Wood, Sudbury, MA (US);
Timothy Krahn Trudeau, Roanoke, VA (US);
Exelis, Inc., McLean, VA (US);
Abstract
A buck regulator for converting an input DC voltage, V, into an output DC voltage level includes a coupled inductor for outputting the DC voltage level, and an error amplifier for sensing an error in the outputted DC voltage level and a pulse width modulator (PWM) providing a pulse waveform having a duty cycle responsive to the error. Also, included are a Vvoltage driver for outputting the Vvoltage level responsive to the pulse waveform, and a super voltage driver for outputting a super voltage level, Vss, responsive to the pulsed waveform, wherein the super voltage level is higher than the Vvoltage level. The outputted super voltage level is complementary to the outputted Vvoltage level. Also included are dual MOSFETs, which have gates for, respectively, receiving the super voltage level and the Vvoltage level. The dual MOSFETs drive the coupled inductor for outputting the DC voltage level. Furthermore, a pulse shaper is coupled between the PWM and the voltage drivers for forming a sharp pulse having a rise time that is faster than a rise time of the pulse waveform. The sharp pulse is provided as a control signal for activating the voltage drivers.