Charge-based time registers for z-1 implementation

Time-mode signal processing is an advantageous approach in which the time is the processing variable. Time register is used in the construction of time-mode z-1 operator which is the basic building block in the time-mode circuits and systems such as FIR/IIR filters and time amplifiers implementations. In this work, a comparison study between z-1 operators using different types of time register circuit is presented. The circuits of time-registers and z-1 operators are implemented in TSMC 65nm and are verified through simulations in relation to absolute error, signal-to-distortion ratio and current consumption.