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. 23, 1998
Filed:
Sep. 11, 1996
Tzi-Hsiung Shu, Melbourne, FL (US);
Kantilal Bacrania, Palm Bay, FL (US);
Harris Corporation, Palm Bay, FL (US);
Abstract
An analog-to-digital converter (ADC) integrated circuit includes a subconverter stage having an amplifier with a non-ideal gain, and a reference voltage generator for generating a reference voltage for the subconverter stage. The reference voltage generator is adjustable and may include trimmable resistors for providing an adjusted or trimmed reference voltage to a second subconverter stage or second operation of the subconverter stage to compensate for a non-ideal gain of the amplifier. Complicated and difficult capacitor trimming for the amplifier is not needed; rather, a relatively simple and predictable trimming of thin film resistors in the reference voltage generator may be used to compensate for the non-ideal gain of the amplifier and improve performance. A method and apparatus for calibrating the ADC are also disclosed.