Journal
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
Volume 61, Issue 8, Pages 604-608Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSII.2014.2327455
Keywords
Analog front-end (AFE) integrated circuit (IC); high-voltage (HV) switch; pulser; transimpedance amplifier (TIA); ultrasound medical imaging
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Funding
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [2012R1A1A1040958]
- National Research Foundation of Korea [2012R1A1A1040958] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A high-voltage (HV) interface analog front-end (AFE) integrated circuit (IC) for medical ultrasound imaging applications using 0.18-mu m standard CMOS process is presented. The proposed AFE IC includes a HV pulser in the transmit path that safely generates up to 15-Vpp of unipolar pulses at 2.6 MHz, a HV switch for isolation between transmitter and receiver front-end parts, and a 95.1-dB Omega low-power transimpedance preamplifier with 12-MHz bandwidth and 3.5-pA/root Hz input referred noise in the receive path operating at a low 1.1-V supply voltage. Both the pulser and the switch utilize dynamically-gate-biased stacked 3.3-V transistors to enable HV operation without compromising device reliability. The implemented single-channel AFE IC prototype intended for interfacing capacitive micromachined ultrasound transducer consumes 0.15 mm(2) of core die area, making it feasible to be applied for various multi-arraymedical ultrasound imaging systems.
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