Method and device for digitally correcting dc offset
AssigneeElectronics and Telecommunications Research Institute
InventorsJae Hoon SHIM, Hyun Kyu Yu
Life of this patent
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Abstract
There is provided a digital Direct Current (DC) offset correction method and device. The device includes a digital-analog converter charging a load capacitor according to an input code value and generating an initial voltage value of the load capacitor; a comparator comparing an output DC offset value of a discrete-time amplifier and filter on the basis of the initial voltage value with a preset output DC offset value when the discrete-time amplifier and filter and the load capacitor are connected to each other; and a controller changing the input code value of the digital-analog converter according to comparison result of the comparator.
Claims8
A digital Direct Current (DC) offset correction device comprising:
- a digital-analog converter charging a load capacitor according to an input code value and generating an initial voltage value of the load capacitor;
- a comparator comparing an output DC offset value of a discrete-time amplifier and filter on the basis of the initial voltage value with a preset output DC offset value when the discrete-time amplifier and filter and the load capacitor are connected to each other;
- and
- a controller changing the input code value of the digital-analog converter according to comparison result of the comparator.
A digital Direct Current (DC) offset correction method comprising:
- charging a load capacitor according to an input code value of a digital-analog converter and generating an initial voltage value of the load capacitor;
- comparing an output DC offset value of the discrete-time amplifier and filter on the basis of the initial voltage value with a preset output DC offset value when the discrete-time amplifier and filter and the load capacitor are connected to each other;
- and
- changing the input code value of the digital-analog converter according to the comparison result.
Dependencies are inferred from the claim text.