Patent ID: 7408494
Filing Date: 2008-08-05
Classification: H03M

Abstract:
1. A continuous-time delta-sigma analog digital converter for converting an analog input signal (IN) to a digital output signal (OUT), comprising: an analog filter ( a quantifier ( a feedback device ( wherein the feedback device ( 40 ) comprises a switching device (INV 1 , INV 2 ) actuated by the digital output signal (OUT) of the quantifier ( 30 ) and coupled capacitively (Cc 1 , Cc 2 ) to the integration capacitor for generating a second feedback signal corresponding to the differentiated output signal of the quantifier ( 30 ), by means of which device charge portions are transmitted to the integration capacitor if there is a variation in the digital output signal (OUT), wherein the charge portions correspond to the amount of the variation.