Design of a high voltage 1 to 64 Mux/De-Mux for high frequency synthetic aperture imaging

In this paper, a high voltage 1 to 64 Mux / De-Mux is proposed using a high voltage CMOS process for a high frequency synthetic aperture imaging system. The controlling stage is made up of a low voltage 6 to 64 decoder with additional enable controlling logic. A low voltage (0V~3.3V) to high voltage (-18V~+18V) level shifter structure is used to change the controlled voltage potential. The high voltage Mux/De-Mux is comprised of two source-connected DNMOS pairs at each channel as a switch. The experimental results show that the switch has a 3-dB bandwidth over 70 MHz, and 180 ohms of on-resistance, -2.635 dB of insertion loss, and -26.5261 dB of off-isolation at 70MHz.