Switching noise resistant integrating analog-digital converter
AssigneeMagnaChip Semiconductor, Ltd.
InventorsDae Ho Lim, Yong Sup Lee
Life of this patent
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Abstract
Provided is an integrating analog-digital converter. According to the present examples, the resistance against external noise is improved by incorporating a differential amplifier into an integrating analog-digital converter. Some examples also include a section where an input voltage and a reference voltage are simultaneously blocked such that switching noise may be minimized and a reference voltage may also be stably supplied. Further, examples are designed to manage a residue, which may be generated when an integral operation to an analog input value is finished, to be processed not in an additional converter but in control logic itself, thereby reducing a size of a circuit device.
Claims20
An integrating analog-digital converter comprising:
- an input unit configured to receive an input voltage and a predetermined reference voltage;
- a differential amplifier configured to receive and amplify a differential input voltage based on the input voltage that is outputted through an output terminal of the input unit;
- a comparator configured to compare a differential output voltage that is outputted from the differential amplifier;
- and
- a control logic unit configured to output a counted digital output value, in accordance with a result of the comparator, as a final output value.
An integrating analog-digital converter comprising:
- a differential amplifier configured to receive and amplify a differential input voltage based on an input voltage and a predetermined reference voltage from an input unit, wherein the transmission of the input voltage and the predetermined reference voltage into the differential amplifier is regulated by switches;
- a comparator configured to compare a differential output voltage that is outputted from the differential amplifier;
- and
- a control logic unit configured to output a counted digital output value, in accordance with a result of the comparator, as a final output value, and configured to output a switch control signal that controls the switches in accordance with a result of the comparator.
Dependencies are inferred from the claim text.