Abstract: A transmitting and receiving circuit may include a first CMOS inverter configured to receive a first power supply signal and a first input signal. The transmitting and receiving circuit may include a first calculation amplifier including a non-inverted input terminal connected to an output terminal of the first CMOS inverter, and a first resistor connected between the output terminal of the first calculation amplifier and a first node. The output terminal of the first calculation amplifier and an inverted input terminal of the first calculation amplifier may be connected to each other. A first output signal may have a level smaller than that of the first input signal and may be output to the first node.

Abstract: A delay line-based time to digital converter includes: a coarse counter for counting a pulse of a timing clock and measuring a time when an edge of an input signal is detected; a fine time interpolator including a plurality of first delay elements and a plurality of second delay elements, a delay line with the input signal as an input, and a flip-flop unit with outputs of the first delay element or outputs of the second delay elements as inputs and the timing clock as an operation frequency; and a timestamp generator for receiving a digital value on a time measured by the coarse counter and the fine time interpolator, and generating a timestamp on the input signal by using the received digital value.

Abstract: A delay line-based time to digital converter includes: a coarse counter for counting a pulse of a timing clock and measuring a time when an edge of an input signal is detected; a fine time interpolator including a plurality of first delay elements and a plurality of second delay elements, a delay line with the input signal as an input, and a flip-flop unit with outputs of the first delay element or outputs of the second delay elements as inputs and the timing clock as an operation frequency; and a timestamp generator for receiving a digital value on a time measured by the coarse counter and the fine time interpolator, and generating a timestamp on the input signal by using the received digital value.