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:
Jun. 26, 1979
Filed:
Aug. 08, 1977
William H Mosley, Jr, St. Petersburg, FL (US);
Eugene R Wade, Melbourne, FL (US);
NCR Corporation, Dayton, OH (US);
Abstract
A variable frequency oscillator is disclosed wherein the magnitude of a signed digital input determines the output frequency. The variable oscillator includes a digital integrator circuit for performing a modulo 2.pi. digital integration of the input signal. The integrator circuit is connected to a digital quadrature circuit which converts the integrated input signal from its polar form into two digital control signals in the rectangular domain having a quadrature phase relationship. The control signals are utilized in analog form by their combination with a high frequency carrier and its quadrature phase to synthesize the desired output frequency in an analog embodiment. According to another embodiment the quadrature synthesis is provided by the digital combination of the control signals and the phased carrier components.