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. 15, 1988
Filed:
Jan. 28, 1987
Robert J Fretz, Maplewood, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
An improvement to an implantable amplitude modulated frequency receiver wherein a resistor in the demodulator portion of a prior art receiver, which provides a discharge path for a capacitor, is replaced with an active circuit portion that includes a semiconductor device that provides the discharge path wherein the conductivity level of the semiconductor device is inversely related to the level of conduction of a rectifier to which the received amplitude modulated signal is applied. The active circuit portion improves the efficiency of the receiver in that less power is lost than in the case of the resistor the active circuit portion replaces.