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:
Mar. 03, 1992
Filed:
Sep. 18, 1990
Harufusa Kondoh, Hyogo, JP;
Takeo Nakabayashi, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A signal generator for generating pulse signals having a waveform required by the Recommendation of International Telegraph and Telephone Consultative Committee (CCITT) is disclosed. The signal generator utilizes two D/A converters whereby the limitation of the operable frequency of the D/A converters restricts the variation rate of the output pulses. Each D/A converter provides the converted analog signal to the pulse transformer at timings different from one another. The pulse transformer detects the difference between the provided analog signals and provides a pulse signal having the required waveform. The difference of the output voltages between the two D/A converters varies at two times the operable frequency rate of the D/A converters, resulting in the pulse signals changing at a rate exceeding the operation frequency of the D/A converters.