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. 03, 2013
Filed:
Sep. 20, 2011
Robert S. Jones, Iii, Austin, TX (US);
Robert S. Jones, III, Austin, TX (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A redundant signed digit (RSD) analog to digital converter (ADC) receives a high voltage (VRH) and a low voltage (VRL) for use in converting an input signal to a digital signal. A doubling circuit receives the input signal and doubles the input signal to provide a doubled input signal using an amplifier and a first capacitor. The first capacitor has a capacitance of a first magnitude. A VR circuit continues processing the doubled input signal to provide a 2VR signal. A Vref circuit (VR+Cand C) provides a first RSD residue signal that is equal to a sum of a reference Vref and the 2VR signal. The first RSD residue signal is produced using the amplifier, a second capacitor, and the high power supply voltage. The second capacitor has a capacitance equal to half that of the first capacitor.