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. 27, 2001
Filed:
Sep. 14, 1999
Steven D. Pace, Maldon, GB;
Michael Burl, Chargrin Falls, OH (US);
Douglas M. Blakeley, Euclid, OH (US);
Picker International, Inc., Highland Heights, OH (US);
Abstract
A gradient amplifier (,), for driving a gradient coil (,) of an MRI scanner, includes a plurality of first modules (,). The first modules (,) provide unipolar PWM control of an input supplied thereto to generate a unipolar waveform. A high voltage DC power supply (,) electrically connected to the first modules (,) supplies the input to the first modules (,). At least one second module (,) is electrically connected to the first modules (,). The second module (,) selectively provides polarity switching of the unipolar waveform output from the first modules (,) to generate a bipolar waveform which drives the gradient coil (,).