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:
Jun. 21, 2011
Filed:
Mar. 03, 2008
Richard Morisson, Grenoble, FR;
Richard Morisson, Grenoble, FR;
E2V Semiconductors, , FR;
Abstract
The invention relates to sample-and hold modules, and notably those which are intended to be placed upstream of an analog-digital converter. The sample-and-hold module conventionally comprises a differential pair of transistors, a follower transistor and a storage capacitor. The follower transistor is turned on during a sampling phase by the application of an emitter current by means of a first current switch and can be disabled during a hold phase by the application of a disabling voltage to its base. The sample-and-hold module operates according to the invention with a hold phase beginning at the same time as the end of a sampling phase and terminating before the start of a new sampling phase. Switching spikes are thus avoided at the transition between the end of a hold phase and the start of a new sampling phase.