A high-voltage cascode-connected three-level pulse-generator for bio-medical ultrasound applications
Peer reviewed, Journal article
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Original versionIEEE International Symposium on Circuits and Systems proceedings. 2019, . 10.1109/ISCAS.2019.8702531
This paper presents a high-voltage three-level pulse-generator circuit which reduces the driving requirement of the input signals. This is achieved by cascoding making it possible to use low-voltage input transistors. The reduced driving requirement of the input signals makes it possible to use simple two-component capacitive level-shifters. The circuit is implemented in a commercially available 180nm high-voltage CMOS process. Circuit functionality is verified by simulation on schematic and layout using high supply voltages of positive and negative 70V. Simulation results indicate a reduction in input gate-charge by a factor of about 28. Average power consumption of about 0.61mW and 0.44mW is observed for a three-level and a two level 4-period 5MHz pulse using a pulse-repetition frequency of 5kHz.