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:
Dec. 01, 1998
Filed:
Jul. 28, 1997
Joseph M Gorin, Santa Rosa, CA (US);
Roger D Sheppard, Santa Rosa, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
An autoranging apparatus and method for an analog-to-digital converter (ADC) which uses a proposed gain detector including a peak of absolute detector and a quantizer to determine a proposed gain, and a amplifier gain setting rule processor in parallel with an anti-aliasing (AA) filter. The rule processor generates a current gain from inputs including the current gain, proposed gain, and a resolution bandwidth (RBW) value. The current gain is used to set a variable amplifier before the signal is sampled & held, and then converted to a digital word via the ADC. A variable bandpass filter can additionally be used before the AA filter to produce a pre-filtered signal. The pre-filtered signal would similarly be processed by the proposed gain detector. The resulting digital word is scaled down again through values stored in a look-up table. The look-up table is generated via a calibration routine which determines with certain precision the variable gain levels for the particular amplifier device used.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile