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:
Nov. 23, 1993
Filed:
Apr. 22, 1992
Kenzo Funatsu, Musashimurayama, JP;
Takashi Ito, Kokubunji, JP;
Naoki Yashiki, Kodaira, JP;
Chiaki Kubomura, Tokyo, JP;
Keiji Kuboyama, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A data processor comprises a multifrequency receiver formed together with a central processor on a semiconductor substrate. The multifrequency receiver produces digital data for identifying a tone wave included in a multifrequency analog signal or produces an identification result in accordance with the condition or signal issued by the central processor. The multifrequency receiver is thereby operative to deal with tone waves which are flexible in type and input analog signals which are flexible in their frequency band, and has increased latitude of choice for the operational characteristics and function such as the number of sampling periods of input analog signals and the discrimination accuracy.