WCSE 2017
ISBN: 978-981-11-3671-9 DOI: 10.18178/wcse.2017.06.171

A Broadband Variable Passive True Time Delay at 2-12GHz

Li Wenyuan, Cao Mingxi

Abstract— A fully integrated passive True Time Delay (TTD) with 66ps continuous changing delay time and less than 11% delay variation has been realized in a TSMC 0.18um CMOS technology. A six-stage trombone configuration is employed to provide 55ps tuning capability with 11ps delay resolution for the coarse tuning part. The fine tuning part employs six LC delay cells with varactor added in both ground branches to provide 11ps continuous delay time. The simulated input and output return loss is better than -10dB over the 2-12GHz range and the insertion loss is -23±1.5dB at 10GHz. The simulated worst-case IIP3 at 6GHz is 1.28dBm and the proposed TTD core occupies 1.782mm2, respectively.

Index Terms— passive, True Time Delay (TTD), CMOS, trombone configuration.

Li Wenyuan, Cao Mingxi
Institute of RF-&OE-ICs, Southeast University, CHINA


Cite: Li Wenyuan, Cao Mingxi, "A Broadband Variable Passive True Time Delay at 2-12GHz," Proceedings of 2017 the 7th International Workshop on Computer Science and Engineering, pp. 988-992, Beijing, 25-27 June, 2017.