Circuit and system for processing an analog input signal, and method of using thereof

A system for processing analog signals, the system comprising:

• an input device, configured to generate an input signal;
• a modulo circuit configured to apply a modulo operation to the input signal, thereby generating a folded signal, wherein the folded signal exhibits a higher bandwidth than the input signal;
• an analog mixer circuit configured to multiply the folded signal by a periodic signal to produce a mixed signal;
• a low-pass filter circuit configured to filter the mixed signal to generate a filtered signal;
• an analog-to-digital converter circuit having a bandwidth suited for the input signal, and configured to sample the filtered signal at a sampling rate that is lower than a Nyquist frequency of the folded signal, to generate a digital output signal representative of the folded signal;
• a modulo recovery circuit configured to apply a modulo recovery operation to the digital output signal to generate a digital recovered signal representative of the input signal;
• and
• a processor configured to perform at least one software or hardware based operation based on the recovered signal.

A method of processing an analog input signal, the method comprising:

• applying a modulo circuit to the input signal to generate a folded signal, wherein the folded signal exhibits a higher bandwidth than the input signal;
• obtaining a periodic signal;
• applying a multiplier circuit on the folded signal and the periodic signal to produce a mixed signal;
• filtering the mixed signal using a low-pass filter to generate a filtered signal;
• applying an analog-to-digital converter (ADC) circuit on the filtered signal to generate a digital signal representative of the folded signal, wherein a sampling rate of the ADC circuit is lower than a Nyquist frequency of the folded signal;
• applying a modulo recovery operation to the digital signal to generate a recovered signal representing a digital version of the input signal;
• and
• performing at least one software or hardware based operation on the recovered signal.