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:
Jul. 14, 2009
Filed:
Dec. 14, 2005
Hashem Zare-hoseini, Cambridge, GB;
Izzet Kale, Mitcham, GB;
Richard Charles Spicer Morling, London, GB;
Hashem Zare-Hoseini, Cambridge, GB;
Izzet Kale, Mitcham, GB;
Richard Charles Spicer Morling, London, GB;
University of Westminster, , GB;
Abstract
A method of Digital to Analogue conversion of an input signal Dfor suppressing the effect of clock-jitter in a Delta-Sigma analogue to digital converter, or class D amplifier, comprises charging a capacitor to a reference voltage value (V) during a first phase (φ) of a clock signal, discharging the capacitor during a second phase (φ) of the clock signal, wherein the discharge is regulated by a biased transistor, responsive to the voltage on the capacitor, in a first part of the second phase to provide an approximately constant discharge current, and regulated in a second part of the second phase for rapidly discharging the capacitor before the end of the second phase; and providing an output (U, OUT) as a function of the discharge current and the input signal D. The output signal U, may be applied as a feedback signal to a loop filter in a Delta-Sigma converter. Alternatively, the output may represent the output of a Class D amplifier.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile