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:
May. 26, 1998
Filed:
May. 01, 1997
Tai-Haur Kuo, Tainan, TW;
Jhy-Woei Yeh, Tainan, TW;
National Science Council, Taipei, TW;
Abstract
A method for stabilize single-stage sigma-delta modulators is disclosed. The method of the present invention employs stability detectors to detect whether the modulator enters the unstable region or not. And internal signal paths that already exist in stable operation are used to recover a unstable modulator to stable region. In the first kind of embodiment, stabilization effect is supported by reduction of effective order. And in the second kind of embodiment, individual instability recovery in each stage in the modulator provide the necessary stabilization mechanism. The present invention can be applied to various configurations, such as multiple feedback and feedforward, and various application, like low-pass and band-pass system.
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