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:
May. 04, 2010
Filed:
Oct. 22, 2007
Alain Chapuis, Riedikon, CH;
Shuyu Lei, Beijing, CN;
Alain Chapuis, Riedikon, CH;
Shuyu Lei, Beijing, CN;
Power-One, Inc., Camarillo, CA (US);
Abstract
A self-tracking analog-to-digital converter includes a digital-to-analog converter (DAC) adapted to provide a variable reference voltage, a windowed flash analog-to-digital converter (ADC) adapted to provide an error signal ecorresponding to a difference between an input voltage Vand the variable reference voltage, and digital circuitry adapted to generate suitable control signals for the DAC based on the error signal e. More particularly, the digital circuitry includes a first digital circuit adapted to provide a first function value f(e) in response to the error signal e, the first function value f(e) representing an amount of correction to be applied to the variable reference voltage. A second digital circuit is adapted to provide a counter that combines the first function value f(e) with a previous counter state Nto provide a next counter state N, the next counter state Nbeing applied as an input to the digital-to-analog converter. A third digital circuit is adapted to scale the previous counter state Nby a factor M and combine the scaled counter state M·Nwith the error signal eto provide a digital output value Drepresenting the input voltage V.