CIRCUIT AND METHOD OF CONVERTING AN ANALOG SIGNAL INTO A DIGITAL SIGNAL

摘要

A digital signal restoring circuit and a digital signal restoring method are provided to offer a clock signal for controlling a range that an analog signal is converted into a digital signal in a desired restoration range, thereby restoring and outputting only a digital signal in a desired range. A digital signal restoring circuit(100) includes a clock signal generator(110), an ADC(Analog to Digital Converter) unit(120), and a sampling unit(130). The clock signal generator provides a clock signal(SIG3) based on an input signal(Vin), and first and second threshold values(VDD/2+Va,VDD/2-Va). The ADC unit provides a first digital signal(SIG4) based on a reference value(VDD/2) corresponding to an average value of the first and second threshold values and the input signal. The sampling unit is synchronized with the clock signal to sample the first digital signal to output a second digital signal(SIG5).