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:
May. 19, 1981
Filed:
Sep. 11, 1978
Kyuichi Hareyama, Tokyo, JP;
Nippon Electric Co., Ltd., Tokyo, JP;
Abstract
An analog-to-digital converter of the integrating type is disclosed in which, while an analog input signal is integrated over a first period, a reference signal is selectively superposed on the analog input signal during the first period when the integrated value exceeds a predetermined value, so as to reduce the absolute value of the integrated value of the analog input signal, and then at the termination of the first period the integrated value is inversely integrated by a reference signal (a separate reference signal or the same reference signal as above-mentioned), a period within the first period during which the reference signal is superposed and the second period, i.e., from the beginning of the inverse integration after the first period to the time point that the integrated value reaches the predetermined value being used to produce an output in a digital form. Since the inverse integration is selectively performed in the first period, the absolute value of the integrated value is small at the termination of the first period. As a result, the second period is shortened and the output amplitude of the integrator is reduced.