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US 8,410,963 B2Granted
Data converter circuit and method
AssigneeInfineon Technologies AG
InventorTorsten Hinz
Life of this patent
Estimating the term…
Abstract
In an embodiment, an oversampled data converter includes a lowpass filter having a filter stage comprising a dynamic limiter, where the dynamic limiter having a limit set by an signal level at an input to the oversampled data converter. The oversampled data converter also includes a quantizing block comprising an input coupled to an output of the lowpass filter and an output coupled to an input of the lowpass filter.
Claims24
An oversampled data converter comprising:
- a lowpass filter having a filter stage comprising a dynamic limiter, the dynamic limiter having a variable limit set by a signal level at an input to the oversampled data converter;
- and
- a quantizing block comprising an input coupled to an output of the lowpass filter and an output coupled to an input of the lowpass filter.
A method of performing a data conversion, the method comprising:
- determining a limit based on an amplitude of an input signal;
- and
- filtering a sum of the input signal and a feedback signal to form a filtered signal, filtering comprising
- integrating the sum of the input signal and feedback signal to form a first integrated signal, and
- limiting the integrated signal to the determined limit;
- quantizing the filtered signal to form a quantized signal;
- forming the feedback signal based on the quantized signal;
- and
- forming an electronic output signal based on the quantized signal.
6 more elements
An integrated circuit comprising:
- an oversampled digital-to-analog converter (DAC), the oversampled DAC comprising:
- a lowpass filter having filter stages comprising an integrator and a dynamic limiter, the dynamic limiter having a variable limit set according to a signal level at an input to the oversampled DAC;
- and
- a quantizing block comprising an input coupled to an output of the lowpass filter and an output coupled to an input of the lowpass filter.
1 more element
Dependencies are inferred from the claim text.