Title :
A New 80V 32x32ch Low Loss Multiplexer LSI for a 3D Ultrasound Imaging System
Author :
Hara, Kenji ; Sakano, Junichi ; Mori, Mutsuhiro ; Tamano, Satoshi ; Sinomura, Ryuichi ; Yamazaki, Kouichi
Author_Institution :
Hitachi Res. Lab., Hitachi Ltd.
Abstract :
This paper presents a new concept for an 80V multiplexer LSI with the world´s largest 32 times 32ch cross-point switches for a real-time 3D ultrasound imaging system. This system requires hundreds of thousands of high voltage electrical switches. We propose a new gate floating type analog switch circuit with thin gate oxide power MOSFETs and a low-loss gate driving method for this LSI. The developed LSI can handle plusmn40V at 15 MHz ultrasound signal with reasonably low power dissipation (10mW/LSI) and can operate at a 33 MHz clock frequency for the first scanning operation. The developed LSIs are assembled in a hand probe and show a fine 3D volume image
Keywords :
CMOS analogue integrated circuits; driver circuits; large scale integration; multiplexing equipment; power MOSFET; power integrated circuits; switching circuits; ultrasonic imaging; 15 MHz; 33 MHz; 80 V; CMOS analogue integrated circuits; cross-point switches; driver circuits; gate floating type analog switch circuit; high voltage electrical switches; large scale integration; low loss multiplexer LSI; low-loss gate driving method; multiplexing equipment; power integrated circuits; real-time 3D ultrasound imaging system; switching circuits; thin gate oxide power MOSFET; ultrasonic imaging; Clocks; Large scale integration; MOSFETs; Multiplexing; Power dissipation; Real time systems; Switches; Switching circuits; Ultrasonic imaging; Voltage;
Conference_Titel :
Power Semiconductor Devices and ICs, 2005. Proceedings. ISPSD '05. The 17th International Symposium on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-7803-8890-9
DOI :
10.1109/ISPSD.2005.1488025
