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. 23, 1978
Filed:
May. 20, 1977
James R Whitten, Scotia, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
A time delay modulator is disclosed in which the instantaneous time base of a carrier signal is varied in accordance with a modulating signal. In one embodiment, modulation is achieved through the use of charge transfer delay lines and variable frequency clocks in which a carrier wave signal is applied to the input of the delay line and the carrier wave signal is propagated through the delay line at a rate determined by the output frequency of an oscillator which deviates from a nominal frequency by an amount proportionate to the magnitude of the modulating signal. In another embodiment, an analog-to-digital converter, a shift register and a digital-to-analog converter in serial configuration are each controlled by a voltage controlled oscillator. The carrier wave signal is connected to the input of the analog-to-digital converter and samples are taken in accordance with a clock input. Parallel digital output signals are applied to an N x M bit shift register, the output of which is applied to the digital-to-analog converter having a serial output. A modulating signal is applied to the voltage controlled oscillator which provides an output deviating from a nominal frequency by an amount proportional to the magnitude of the modulating signal.