An integrated time register and arithmetic circuit with combined operation for time-domain signal processing

This paper describes a novel integrated time register and arithmetic circuit (TRAC) for time-domain signal processing (TDSP). TRAC has four basic functions: time register, time adder, time subtractor, and time amplifier. One TRAC is able to accept multiple inputs and perform the combination of basic functions. Thus, complex arithmetic operations can be performed synchronously with a TRAC. In a synchronous time-to-digital converter (TDC), a high-gain residue amplifier with the suppressed offset-time component at the output can be implemented by exploiting the advantages of TRAC. The functions of TRAC are with post-layout data simulated in 110nm CMOS technology.