Open AccessCMOS ultrasonic analogue front‐end with reconfigurable pulser/switch for medical imaging applications
Author(s) -
Cha H.K.
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.2440
Subject(s) - cmos , preamplifier , transimpedance amplifier , analog front end , electrical engineering , integrated circuit , capacitive micromachined ultrasonic transducers , interfacing , electronic engineering , capacitive sensing , engineering , computer science , amplifier , computer hardware , operational amplifier
A highly integrated bidirectional analogue front‐end (AFE) circuit for interfacing capacitive micromachined ultrasound transducer in medical imaging systems is presented. The proposed AFE features a reconfigurable high‐voltage (HV) pulser which generates over 15 V pulses at 2.6 MHz in the transmit mode and also operates as an HV isolation switch for the receive path circuits, thereby saving significant silicon area. The AFE also includes a low‐power low‐noise preamplifier which achieves 103 dBΩ transimpedance gain at 2.6 and 5 MHz bandwidth while operating at 1.65 V supply voltage. The AFE integrated circuit (IC) is implemented using 0.18 µm standard CMOS process and the total area of the single‐channel core is 0.052 mm 2 which is more than 65% of size reduction in comparison to previous work.