Analog to digital converter using a programmable interpolator and method thereof

A method for converting analog signals to digital signals, comprising the steps of:

• converting inputted analog signals to folding signals;
• interpolating the folding signals, adjusting a number of the interpolated folding signals by a predetermined control signal, and outputting the interpolated folding signals;
• and
• converting the interpolated folding signals to digital signals.

A receiving device for a terminal in a mobile communication system, mounted with an RF receiver, which is applicable to UMTS (Universal Mobile Telecommunications System :

• Asynchronous Code Division Multiple Access system) or GSM/GPRS (the Global System for Mobile communications/General Packet Radio Service) mode signals in common and converts RF signals received by the RF receiver to baseband signals, the device comprising:
• a digital signal processor for generating a control signal to select at least one of an UMTS or a GSM/GPRS mode;
• and
• an analog to digital converter, which has an interpolation rate fixed by the control signal, converts baseband analog signals outputted from the RF receiver to digital signals, and outputs the digital signals to the digital signal processor, wherein the analog to digital converter comprises:
• a folding block for converting inputted analog signals to folding signals;
• an interpolation block for interpolating the folding signals, for adjusting a number of the interpolated folding signals by a predetermined control signal and for outputting the interpolated folding signals;
• and
• a converter block for converting the interpolated folding signals to the digital signals.