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:
May. 22, 1984
Filed:
Nov. 23, 1981
Applicant:
Inventors:
Russell A Strobel, Sunrise, FL (US);
Jawdat Rihani, Cairo, EG;
Richard E Lunquist, Pompano Beach, FL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455 86 ; 455 83 ;
Abstract
A multi-channel transceiver uses a single high-stability crystal to generate a signal that is multiplied to a frequency near a desired transmitting and receiving frequency. The multiplied frequency is mixed with the output of an offset oscillator having a frequency selected so that the sum or difference of the two frequencies is a desired transmission frequency and the other of the sum or difference is an appropriate frequency for a local oscillator. The offset oscillator may use crystals of lower frequency stability than that of the single high-stability crystal.