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. 23, 1988
Filed:
Sep. 19, 1986
Applicant:
Inventor:
John S Ruppel, N. Richland Hills, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
455209 ; 455314 ;
Abstract
An IF system that makes satisfactory use of a first IF stage frequency selected from between 108 MHz and 132 MHz to thereby provide an IF system that can be utilized in radios intended for reception in all land mobile frequency bands. The first IF stage (17) includes a high tolerance crystal filter (24) that contributes to the satisfactory reception performance of a radio so equipped.