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:
Sep. 02, 2014
Filed:
Jun. 29, 2012
Ahmad H Atriss, Gilbert, AZ (US);
Steven P. Allen, Chandler, AZ (US);
Rakesh Shiwale, Chandler, AZ (US);
Mohammad Nizam U. Kabir, Tempe, AZ (US);
Ahmad H Atriss, Gilbert, AZ (US);
Steven P. Allen, Chandler, AZ (US);
Rakesh Shiwale, Chandler, AZ (US);
Mohammad Nizam U. Kabir, Tempe, AZ (US);
Freescale Semiconductor, Inc, Austin, TX (US);
Abstract
An analog-to-digital converter stage includes: a comparator and logic circuit having first upper and lower unscaled voltage trip points that are different than upper and lower residue voltage trip points; and a switched capacitor circuit. The comparator and logic circuit is configured prior to an initial residue calculation cycle to compare a magnitude of an unscaled input voltage to the first upper and lower unscaled voltage trip points, to generate an initial output bit, and to generate a voltage scaling and gain control signal. The switched capacitor circuit is configured to sample the unscaled input voltage, to receive a reference voltage, and to receive the voltage scaling and gain control signal for selectively controlling a subset of switches of the switched capacitor circuit to scale the unscaled input voltage sample and reference voltage and generate an initial residue voltage during a single operation of the initial residue calculation cycle.