Delta-sigma ad converter and delta-sigma ad converting method
AssigneeAsahi Kasei Microdevices Corporation
InventorYuichi MIYAHARA
Life of this patent
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Abstract
Provided is a delta-sigma AD converter including a delta-sigma modulating section that outputs a digital signal obtained by performing delta-sigma modulation with an oversampling ratio on an input analog signal; a digital filtering section that filters the digital signal with the oversampling ratio; a control terminal into which an external control signal is input; an output control section that performs control to output an output signal based on the filtered digital signal, according to the external control signal; and a setting section that sets the oversampling ratio based on interval information of the external control signal.
Claims13
A delta-sigma AD converter comprising:
- a delta-sigma modulating section that outputs a digital signal obtained by performing delta-sigma modulation with an oversampling ratio on an input analog signal;
- a digital filtering section that filters the digital signal with the oversampling ratio;
- a control terminal into which an external control signal is input;
- an output control section that performs control to output an output signal based on the filtered digital signal, according to the external control signal;
- and
- a setting section that sets the oversampling ratio based on interval information of the external control signal.
A delta-sigma AD converting method comprising:
- outputting, by a delta-sigma AD converter, a digital signal obtained by performing delta-sigma modulation with an oversampling ratio on an input analog signal;
- filtering, by the delta-sigma AD converter, the digital signal with the oversampling ratio;
- performing control, by the delta-sigma AD converter, to output an output signal based on the filtered digital signal, according to an external control signal input from a control terminal;
- and
- setting, by the delta-sigma AD converter, the oversampling ratio based on interval information of the external control signal.
Dependencies are inferred from the claim text.