A fast integrating ADC using precise time-to-digital conversion

A 10-bit 20Msps integrating ADC is designed using single-slope analog-to-time conversion followed by 20 ps resolution time-to-digital conversion. Simulation study of the circuit is performed and it is shown that the target ADC device is realizable. The layout design, which is under preparation, will be soon submitted for fabrication and the characteristics of the chip will be obtained in the near future.