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:
Sep. 01, 2020
Filed:
Jan. 17, 2020
Eridan Communications, Inc., Mountain View, CA (US);
Richard W. D. Booth, Carson City, NV (US);
Eridan Communications, Inc., Mountain View, CA (US);
Abstract
A frequency-multiplying DDS includes a digital multiplier, a phase accumulator, a post-accumulator digital processing section, and a digital-to-analog converter (DAC). The digital multiplier multiplies a digital tuning word of value M by a digital multiplier of value B, to produce a digital product (M×B), and the n-bit accumulator accumulates by a step size of the digital product (M×B), at a rate of a low-speed reference clock of frequency f/B. The post-accumulator digital processing section synthesizes B digital waveforms from the sequence of n-bit accumulator output numbers produced by the n-bit accumulator, and rotates each digital waveform with respect to each adjacent digital waveform by (M/2)×2π radians. The DAC serializes the digital samples of the B digital waveforms at full speed, i.e., at a rate f, to produce a full-speed serialized digital output having 2/M samples per cycle, and converts the full-speed serialized digital output to a final output analog waveform of frequency f=(M/2)×f.