This letter presents a compact programmable high-voltage (HV) pulser for ultrasound imaging, designed for driving capacitive micromachined ultrasonic transducers (CMUTs) in miniature ultrasound probes. To enable bipolar return-to-zero (RZ) pulsing and embedded transmit/receive switching, a compact back-to-back isolating HV switch is proposed that employs HV floating-gate drivers with only one HV MOS transistor each. The pulser can be digitally programmed to generate bipolar pulses with and without RZ, with a peak-to-peak swing up to 60 V, as well as negative and positive unipolar pulses. It can generate bursts of up to 63 pulses, with a maximum pulse frequency of 9 MHz for an 18-pF transducer capacitance. Realized in TSMC 0.18- $\mu \text{m}$ HV BCD technology, the pulser occupies only 0.167 mm 2 . Electrical characterization results of the pulser, as well as acoustic results obtained in the combination with a 7.5-MHz CMUT transducer, are presented.
Original languageEnglish
Pages (from-to)79-82
Number of pages4
JournalIEEE Solid State Circuits Letters
Issue number9
Publication statusPublished - 2019

    Research areas

  • Back-to-back isolation, BCD technology, capacitive micromachined ultrasonic transducers (CMUT), high-voltage (HV) bipolar pulser, HV floating-gate driver, transmit/receive (T/R) switching, ultrasound

ID: 66769100