TDMLDO.pdf (1.76 MB)
Download file

A Four-Channel Gray-Code Addressing TDM Clocked-Analog LDO for Thermo-Optic Tuning in Silicon Photonics

Download (1.76 MB)
posted on 2021-10-12, 02:05 authored by Tianchi YeTianchi Ye, kaixuan ye, Min Tan
This paper presents a Gray-code addressing time division multiplexing (TDM) clocked-analog low-dropout regulator (CLDO) that shares one controller between four output channels with only one compensation capacitor. We apply the Gray-code addressing strategy to reduce the crosstalk. We also apply the split-output amplifier structure to share the compensation capacitor for further chip area reduction. In addition, we introduce a lightweight local-generated supply to increase the dynamic range. Implemented in 130 nm CMOS process, this design has a total chip area of 0.056 mm2 , which is 67.5% smaller than the conventional solution with four identical LDOs. Post layout simulation results show that the presented four-channel TDM CLDO can simultaneously track four 1 Vpp sinusoidal signals at different frequencies with negligible crosstalk. This TDM CLDO is a promising solution for supplying multiple thermo-optic phase shifters (TOPSs) in silicon photonics


Research on Novel Dual-channel Dynamic Power Chip for Efficient On-Chip Thermal-Light Regulation

National Natural Science Foundation of China

Find out more...

Major State Basic Research Development Program of China under Grant 2018YFA0704400

Fundamental Research Funds for the Central Universities, HUST under Grant 2019kfyXKJC037


Email Address of Submitting Author

Submitting Author's Institution

Huazhong University of Science and Technology

Submitting Author's Country

  • China