Journal of Undergraduate Research


time-difference amplifier, time-to-digital converters, digital signal


Ira A. Fulton College of Engineering and Technology


Electrical and Computer Engineering


Currently most digital converters convert from an analog voltage signal to a digital signal. In recent years some progress has been made in converting from an analog time signal to a digital signal. The purpose of this project is to improve upon current designs of time-to-digital converters by making a time-difference amplifier that is more power efficient and less sensitive to variation.

Currently time-to-digital converters are commonly implemented similarly to analog voltage-to-digital converters, using a two-step architecture [1]. In a voltage-to-digital converter, the first stage is a coarse quantizer, and the difference between the voltage signal and the quantization is then amplified. The amplified signal is then passed through another quantizer before being converted to a digital signal [1,2]. Time-to-digital converters can use the same process but using time instead of voltage. However, amplifying time is more challenging than amplifying voltage. Thus, there is a need for time-difference amplifiers (TDA).