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. 15, 2016
Filed:
May. 14, 2014
Thales, Courbevoie, FR;
Patrick Gremillet, Bazainville, FR;
THALES, Courbevoie, FR;
Abstract
The sample-and-hold device comprises a holding capacitor and operates according to a track phase during which the voltage on the terminals of the capacitor tracks the input signal and according to a hold phase during which the capacitor is isolated from the input signal, it comprises: a differential pair comprising a first transistor Qand a second transistor Qconnected as common emitters, the collector of the transistor Qbeing connected to the holding capacitor, the input signal being applied to the base of the transistor Q; a third transistor Q, of which the base is connected to the collector of the transistor Qand the emitter is connected to the base of the transistor Q, the signal present on the emitter of the transistor Qforming the output signal of the sample-and-hold device; a current source I connected to the collector of the transistor Q; during the track phase, the differential pair Q, Qbeing supplied by a currentI, the transistor Qbeing charged by the current source and by the holding capacitor, during the hold phase, the currentI supplying the differential pair Q, Qbeing disconnected and the holding capacitor being charged by two opposite currents having the same value, equal to the current I of the source.