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:
Feb. 22, 1994
Filed:
Sep. 01, 1992
Wilhelm Florin, Heideweg, DE;
Detlef Ludwig, Duisburg, DE;
Abstract
Method and apparatus for converting an analog input voltage signal (preferably in the form of a low-frequency rectangular voltage) to a digital output signal proportional to the input voltage. The input voltage is integrated to the integrator voltage over a certain integration time. After the expiration of the integration time, the integrator voltage is de-integrated to zero over a de-integration time by a reference voltage and the input voltage is found from the ratio of de-integration time to integration time, multiplied by the reference voltage. During the integration time, modulation pulses, preferably derived from the reference voltage, are superimposed on the input voltage and thus the integrator voltage is influenced, so that a given integrator voltage is obtained regardless of the input voltage.