Design and applications of single-path frequency-translated switched-capacitor systems

Single-path frequency-translated (SPFT) switched-capacitor (SC) systems have been previously proposed for the realization of highly selective bandpass filters with relative bandwidths below 1%. After examining in more generality the design constraints of such SPFT SC systems, novel solutions for the implementation of the decimator and interpolator architectures using an efficient combination of finite-impulse response, and infinite-impulse response SC circuits are presented. Several areas of application of SPFT SC systems, namely for filtering with programmable Q-factor and for single-sideband generation and detection are demonstrated. Detailed measured results, both in the frequency domain and in the time domain, are presented to illustrate the viability and performance of SPFT SC systems with the various operating modes