초록 ▼

A method of controlling an analog-to-digital (A/D) converter for converting an input voltage into digital data. The conversion process includes charging a capacitor with the input voltage to be converted into a digital data, and disconnecting the input voltage from the capacitor. A reference voltage

A method of controlling an analog-to-digital (A/D) converter for converting an input voltage into digital data. The conversion process includes charging a capacitor with the input voltage to be converted into a digital data, and disconnecting the input voltage from the capacitor. A reference voltage, generated according to digital data, is furnished by a control circuit to a digital-to-analog (D/A) converting unit. The reference voltage is applied to the capacitor by turning on a switch connected between the D/A converting unit and the capacitor. New digital data to be furnished by the control circuit is determined according to a charged voltage on the capacitor. The D/A converting unit causes the reference voltage to be delivered to the capacitor to change to a new value according to the new digital data from the control circuit. Before the reference voltage begins a transition to a new value, the switch is turned off and kept off until the reference voltage from the D/A converting unit becomes stable at the new value.

대표청구항 ▼

[ What is claimed is:] [1.] A method of controlling an analog-to-digital (A/D) converter for converting an input voltage into digital data, comprising:charging a capacitor with an input voltage to be converted into digital data;disconnecting the input voltage from the capacitor;generating a referenc

[ What is claimed is:] [1.] A method of controlling an analog-to-digital (A/D) converter for converting an input voltage into digital data, comprising:charging a capacitor with an input voltage to be converted into digital data;disconnecting the input voltage from the capacitor;generating a reference voltage to be compared to the input voltage, wherein generating the reference includes applying digital control data from a control circuit to a digital-to-analog (D/A) converting unit;applying the reference voltage to the capacitor, wherein applying the reference voltage to the capacitor includes turning on a switch connected between the D/A converting unit and the capacitor;determining new digital control data to be furnished by the control circuit according to a relationship between the input voltage and the reference voltage applied to the capacitor;supplying the new digital control data to the D/A converting unit to change the reference voltage to a new value; andbefore the reference voltage begins a transition to the new value, turning the switch off and then keeping the switch off until the reference voltage from the D/A converting unit becomes stable at the new value.