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:
Feb. 11, 1997
Filed:
Jun. 09, 1995
Gordon E Gottfried, Dearborn, MI (US);
Latha Ravi, Farmington Hills, MI (US);
Mark C Burek, Livonia, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
An FM radiowave receiver includes a diversity antenna system responsive to signal strength and noise levels. The signal strength and noise detectors generate representative signals that are compared with a threshold value for determining the input to a control for the antenna switch alternately connecting two or more antennas to the front end of the FM receiver. The present invention provides an adaptive threshold for each of the signal strength and noise signals so that the switching is limited to significant changes in signal strength and noise levels. In the preferred embodiment, the noise level threshold is adapted as a function of the modulation level of the audio composite signal delivered from the FM detector to the FM stereo decoder of the receiver.