Digital to analog converter employing dynamic element matching
AssigneeKoninklijke Philips Electronics N.V.
InventorPetrus Antonius Cornelis Maria Nuijten
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Abstract
A digital to analog converter for converting a multi bit digital input signal into an analog output signal. The converter includes a plurality of substantially equal conversion elements on a semiconductor chip and which are selected in accordance with a dynamic element matching algorithm. The dynamic element matching algorithm is adapted to the position of the conversion elements on the semiconductor chip so as to improve the shaping of the noise caused by the systematic, i.e. position dependent, errors of the conversion elements.
Claims19
A digital to analog converter for converting a multi bit digital input signal into an analog output signal, the converter comprising:
- an array of substantially equal conversion elements on a semiconductor chip, and conversion element selection logic for selecting, in response to the multi bit digital input signal, from said array of conversion elements a number of signal-conversion elements for connection to an output terminal, the selection logic being adapted to perform a dynamic element matching algorithm for shaping the noise, caused by systematic inequalities of the conversion elements, to higher frequencies, characterized in that the selection by the dynamic element matching algorithm is adapted to the position of the conversion elements in said array so as to improve the shaping to higher frequencies of the noise caused by the systematic inequalities of the conversion elements.
A digital to analog converter for converting a digital input signal into an analog output signal, the converter comprising:
- an array of substantially equal conversion elements on a semiconductor chip, and
- conversion element selection logic for selecting, in response to the digital input signal, from said array of conversion elements a number of signal conversion elements for connection to an output terminal in accordance with a dynamic element matching algorithm, wherein the selection logic performs a dynamic element matching algorithm for shaping the noise, caused by position dependent inequalities of the conversion elements, to higher frequencies, and the conversion elements in said array are selected in accordance with the dynamic element matching algorithm so as to provide approximately equal positive and negative error compensation values.
Dependencies are inferred from the claim text.