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:
Jun. 08, 2004
Filed:
May. 16, 2000
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A digital AM demodulator, particularly for demodulating an input signal originating from a tuner, includes a first carrier generator for generating a first carrier signal which is not correlated with the input signal, and a multiplier for multiplying the first carrier signal by the input signal. Filters are arranged upstream and downstream of the multiplier for filtering undesired signals. The digital AM demodulator further includes a circuit for detecting a phase shift between a frequency of the input signal and a frequency of a local carrier signal. A correlation circuit correlates the first carrier signal with the input signal. The first carrier signal and the local carrier signal are mutually correlated, whereas the local carrier signal is not correlated with the input signal.