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:
Apr. 10, 1990
Filed:
Jan. 03, 1989
Jean-Luc Berger, Grenoble, FR;
Marc Arques, Grenoble, FR;
Thomson-CSF, Paris, FR;
Abstract
A charge transfer device having a first storage gate above a first storage region and a second storage gate above a second storage region. The charge duplicator has a first charge injector having a first passage gate which introduces, below the first storage gate, the reference charge to be duplicated. A second charge injector having a second passage gate is located near the second storage gate. The first storage gate and second storage gate are connected to the two inputs of a voltage comparator, the output of the voltage comparator being connected to the second passage gate. The charge duplicator has a mechanism which initially is used to apply a reference voltage to the two inputs of the voltage comparator, thereby leaving the two inputs and the gates connected to them in a floating state. The voltage comparator outputs a high level or low level, depending on the value of the differential voltage between its inputs. A very steep transition occurs between the two levels, which is as close to zero as possible.