研究目的
To address the design challenges of a high voltage (HV) bidirectional and floating switch for 3D echography systems, focusing on isolation voltage, ultra-low power consumption, and minimal area.
研究成果
The paper presents a successful design and implementation of a high voltage bidirectional and floating switch matrix for 3D echography systems, achieving the required specifications of isolation voltage, ultra-low power consumption, and minimal area. The innovative use of a floating latch and parachute safety mechanism ensures reliable operation under high slew rate conditions.
研究不足
The main limitations include the challenge of fitting the required number of switches within the minimal die size and ensuring robust performance against parasitic current injections during fast signal transients.
1：Experimental Design and Method Selection:
The design involves creating a monolithic matrix of high voltage switches with specific characteristics such as isolation voltage up to ±200V, ultra-low power consumption, and high slew rate capability.
2：Sample Selection and Data Sources:
The application is targeted towards medical echography machines, requiring the integration of a matrix of 512 independent HV switches.
3：List of Experimental Equipment and Materials:
The design utilizes DMOS technology for the switches, with considerations for gate driving topology and layout optimization to fit within a 6x6mm2 die size.
4：Experimental Procedures and Operational Workflow:
The design process includes the evolution of layout solutions to meet the stringent area and power consumption requirements, incorporating a floating latch and parachute safety mechanism to prevent spurious commutations.
5：Data Analysis Methods:
The performance is evaluated based on the switch's ability to handle high slew rates up to 30V/ns and maintain ultra-low power consumption during operation.
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