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:
Oct. 17, 2006
Filed:
May. 13, 2004
Dieter Ratzel, Rheinstetten, DE;
Dieter Ratzel, Rheinstetten, DE;
Bruker Biospin MRI GmbH, Ettlingen, DE;
Abstract
A low-noise preamplifier with an electronic amplifying element having an input () and an output (), and with a first transformer () having a primary winding () and a secondary winding () is characterized in that the input () of the electronic amplifying element is the base of a transistor, the gate (G) of a field effect transistor (FET) or the grid of a vacuum tube, and the output () of the electronic amplifying element is the collector, the drain (D) or the anode, the output current (I) being passed from the electronic amplifying element through the primary winding () of the first transformer () to the output () of the preamplifier, wherein the secondary winding () of the first transformer () is connected to the input () of the electronic amplifying element. This preamplifier can be operated with extremely low noise and at any input impedance, in particular, at 50 ohms or 75 ohms.