TDMLDO.pdf (1.76 MB)
Download fileA Four-Channel Gray-Code Addressing TDM Clocked-Analog LDO for Thermo-Optic Tuning in Silicon Photonics
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
Funding
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
History
Email Address of Submitting Author
tianchiye@hust.edu.cnSubmitting Author's Institution
Huazhong University of Science and TechnologySubmitting Author's Country
- China