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:
Oct. 22, 2002
Filed:
Oct. 18, 2000
Timothy J Savord, Lowell, MA (US);
Robert K. O'Toole, Chester, NH (US);
Richard F Dillman, Andover, MA (US);
Douglas Rosich, N. Reading, MA (US);
Ronald Dennis Gatzke, Lexington, MA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An arbitrary waveform generator includes an arithmetic element that can access samples from a waveform sample memory and adjust values accessed from the waveform sample memory to modify waveform power or amplitude. In an illustrative embodiment of the arbitrary waveform generator, the arithmetic element is a multiplying digital-to-analog converter (DAC) that has a first input connection for receiving digitized waveform samples and has a second input connection for receiving a reference signal. An output signal from the multiplying DAC is a mathematical product of the digitized waveform samples and the reference signal. In one example, a reference digital-to-analog converter (DAC) generates the reference signal. In some examples, the digitized waveform samples are digitized samples of an analog waveform signal. In some examples, the arithmetic element is incorporated into the arbitrary waveform generator in a manner to maintain transmit signal resolution over a full range of transmit power settings.