| 摘要 |
The invention relates to a continuous-time delta-sigma analog digital converter for converting an analog input signal (Vin) to a digital output signal (Vout), comprising an analog filter ( 20 ), which filters the analog input signal and has at least one integration capacitor (C 1, C 2, C 3 ), a cycled quantifier ( 30 ) which quantifies the filtered analog signal output by the analog filter ( 20 ) for generating the digital output signal (Vout), and a feedback device ( 40 ) with at least one digital analog converter ( 42, 44 ), which supplies at least one analog feedback signal to the analog filter ( 20 ) on the basis of the digital output signal (Vout). To simplify the feedback without adversely affecting the converter stability and power consumption, provision is made, according to the invention, for the feedback device ( 40 ) for generating a feedback signal corresponding to the differentiated output signal of the quantifier, to comprise a switching device ( 46 ) actuated by the digital output signal (Vout) of the quantifier ( 30 ) and coupled capacitively to the integration capacitor (C 3 ), by means of which device ( 46 ) corresponding charge portions are transmitted to the integration capacitor (C 3 ) when there is a variation in the digital output signal (Vout).
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