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:
Mar. 22, 1988
Filed:
Jun. 04, 1987
Albert Mueller, Erlangen, DE;
Ingemar Neuffer, Erlangen, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
Exactly defined current pulses having high edge steepness and high final value are required for the pulse-like generation of high magnetic fields in inductive users. Particularly in nuclear magnetic resonance tomography, such pulses serve the purpose of building up a topically variable magnetic field with an optimally linear field strength gradient. A power supply for generating such current pulses includes a series connection of a stepping voltage switch and a variable voltage source, whose resultant output voltage is applied to the inductive by a voltage commutator user with a suitable operational sign for the build-up or dismantling of the individual pulses. A switching and regulating circuit controls the stepping switch, the variable voltage source and the voltage commutator dependent on prescribed rated curves of the pulses, such that the pulses have a rise and decay time independent of the final value.