A 9-bit Linear Time to Digital Converter Using Pulse Shrinking Rings

$\mathrm{A}$
compact linear 9-bit Time to Digital Converter (TDC) has been developed, integrating a pulse shrinking ring consisting of an even number of inverting delay elements with a pulse-arbiter delay line. This approach capitalized on the linearity of the pulse shrinking ring and the resolution capabilities of the pulse-arbiter delay line, resulting in a highly linear and accurate time-to-digital converter. The simulation results of the TDC implemented in a
$0.18-\mu \mathrm{m}$
standard CMOS technology demonstrates 69-ps resolution and 9-bit range that corresponds to 36.6-ns input time interval. With an INL of 0.13LSB and ENOB of 8.8-bits.