Time-to-digital converter based on differential delay ring

• Main Authors: MA YICHAO, WANG LIANGYI, JIANG JUNGUO
• Format: Patent
• Language: Chinese; English
• Published: 29.07.2022
• Subjects: AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; HOROLOGY; PHYSICS; TIME-INTERVAL MEASURING

The invention discloses a time-to-digital converter based on a differential delay ring, which comprises a core module, and is characterized in that the core module comprises a differential delay ring module, a counting module and a thermometer code module; the differential time delay ring module comprises a first time delay ring and a second time delay ring, and the time delay difference of an inverter in the first time delay ring and the time delay difference of an inverter in the second time delay ring are constant; the counting module is used for recording clock counting data between the two signals to be measured; the thermometer code module is used for latching an output result of the judgment unit and generating a thermometer code according to latched data; and the differential delay ring module determines the time difference between the two signals to be measured according to the thermometer code and the clock counting data. According to the differential delay ring structure, the delay difference value