Ultra‐short pulse generator using 0.13‐μm CMOS

Abstract

This article presents ultra-short pulse generators based on shaping-differential and phase detect circuits fabricated in a 0.13-lm complementary metal-oxide-semiconductor process. By using a differential circuit, the shapingdifferential and phase detect pulse generators produce pulses with a pulse width of 51.5 and 79.0 ps, respectively. The measured output powers from the shapingdifferential and phase detect pulse generators are 234.6 dBm at 16 GHz, and 228.3 dBm at 8 GHz, respectively.

An 8 Gb/s all‐digital phase discrimination picosecond pulse generator

“…This pulse combiner depends on multiple logic gates and output transformers, and hence suffers from high system complexity and process variations . Recently, a logic‐based pulse generator using an R‐C differentiator to sharpen pulses in the last stage has been proposed, as shown in Figure B. The R‐C circuit can reduce the pulse width whereas the pulse amplitude is also reduced.…”

“…An input digital trigger is fed to the delay cell and the phase‐detect cell (Figure C). In contrast to the pulse generator based on R‐C differentiator, the transmission gate is designed to obtain the shortest delay time. The pull‐down network in phase‐detect cell uses large size transistors to accelerate discharging.…”