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. 05, 2011
Filed:
Jun. 27, 2006
Masakatsu Maeda, Kyoto, JP;
Masakatsu Maeda, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A semiconductor apparatus includes a signal sourcethat outputs a signal of predetermined frequency, a frequency dividerthat receives the output signal of the signal source and is capable of switching the output signal to two or more frequency division ratios, a delta-sigma modulatorthat controls the frequency division ratio of the frequency divider, and a bandpass filterthat receives an output of the frequency divider. The frequency of the input signal of the frequency divider is divided by the frequency division ratio controlled by the delta-sigma modulator, and quantization noise appearing in the output of the frequency divider generated by the delta-sigma modulator is attenuated with the bandpass filter. The semiconductor apparatus easily can convert a signal output by a single signal source to a signal of predetermined frequency and supply a plurality of signals of predetermined frequency using a simple configuration with reduced chip size.