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. 18, 1997
Filed:
Apr. 29, 1996
Michel Schaller, Baar, CH;
Landis & Gyr Technology Innovation AG, Zug, CH;
Abstract
An SC-integrator comprises an amplifier connected to a circuit network, which includes an integrating capacitor and a storage capacitor. The storage capacitor is connected via a first switch to the output of the amplifier and via a second switch directly to one side of a switching circuit capacitor, which is also connected by means of third and fourth switches to ground and the inverting input of the amplifier, respectively. The other side of the switching circuit capacitor is connected by means of a fifth switch to an input voltage Vin, via a sixth switch to ground, and by means of a seventh switch to a reference voltage Vref. The SC integrator uses a storage capacitor of relatively low capacitance value, since the storage capacitor is connected in parallel with the switching circuit capacitor when effecting a reversal of the voltage polarity across the integrating capacitor.