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. 15, 1977
Filed:
Oct. 03, 1975
Harold Garth Nash, Tempe, AZ (US);
Gene Arnold Schriber, Austin, TX (US);
John Robert Linford, Broomfield, CO (US);
Motorola, Inc., Chicago, IL (US);
Abstract
A digital control circuit means responsive to a timing signal and a phase shift control signal accepts digital dibits of data and generates a digital control output signal. A digital phase shifter coupled to the control circuit and responsive to a timing signal generates a main and a secondary channel digital output signal alternately at a first and a second output terminal during successive dibit intervals. The main channel digital output signal is phase shifted a predetermined amount with respect to a main channel digital output signal generated during a preceding dibit interval in response to said digital control output signal. A multiplexer coupled to the first and second output terminals of the phase shifter transmits the main channel digital output signal on a third output terminal and the secondary channel digital output signal on a fourth output terminal. A digital number generator coupled to the third and fourth output terminals and responsive to a timing signal generates a series of digital output signals representative of a predetermined analog magnitude. A digital to analog converter converts the digital output signals from the digital number generator into a differential phase shift keyed analog output signal.