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. 23, 1994
Filed:
Nov. 06, 1992
Philip W Yee, Los Altos, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An analog to digital converter includes first and second folder circuits that map an analog input voltage into first and second folder output voltages, using two different voltage transfer functions. First and second flash circuits generate first and second digital representations of the first and second folder output voltages. An MSB conversion circuit generates a set of most significant bits representative of the analog input voltage input, and a multiplexer selects one of the first and second digital representations in accordance with the least significant bit of the output from the MSB conversion circuit. The analog to digital converter further includes first and second decoder circuits for decoding the first and second digital representations from the two flash circuits, and the multiplexer selects one of the two decoded digital values. The selected decoded value represents the least significant bits of a digital representation of the analog input value.