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:
Jan. 17, 1984
Filed:
Jun. 09, 1981
James B Tsui, Centerville, OH (US);
Rudy L Shaw, Huber Heights, OH (US);
Abstract
An apparatus for use in conjunction with an instantaneous frequency measurement (IFM) receiver, for detecting the presence of two or more RF pulse signals, differing in frequency, between the onset of the first RF signal pulse and the completion of the frequency encode strobe. A low pass filter branching off from the output of the limiting amplifier of the IFM receiver will allow passage of only the low frequency intermodulation products formed from the presence of simultaneous signals. These intermodulation products are then detected and sampled during the time period of interest with a flag set if simultaneous pulses are present. This flag, which indicates to the receiver that the data associated with the received pulse may contain erroneous information, is maintained until reset by the onset of a succeeding RF pulse.