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:
Aug. 19, 1997
Filed:
Jun. 05, 1995
Atsushi Tokura, Tenri, JP;
Shinji Hattori, Higashi-Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A delta sigma modulator includes, an addition circuit with 4 switches, an integration circuit, an analog-digital conversion circuit, a delay circuit, and a digital-analog conversion circuit with 2 capacitors and 6 switches. The addition circuit adds an input signal and a feedback signal, the integration circuit integrates the output of the addition circuit, the analog-digital conversion circuit converts the output of the integration circuit into a digital signal, and the delay circuit delays the output digital signal of the analog-digital conversion circuit. The two capacitors of the digital-analog conversion circuit output a charge in accordance with the output of a flip-flop, the four switches supply a power-supply electric potential and the ground electric potential to the two capacitors and also switches with a feedback digital signal and an inverted signal thereof a voltage that is supplied to the two capacitors, and the two switches connect the voltage switched by the four switches and the two capacitors. The output of the delay circuit is decoded to generate the feedback signal that is supplied to the addition circuit.