title: Development of integrated preamplifier for high-frequency ultrasonic transducers and low-power handheld receiver.
abstract: This paper describes the design of a front-end circuit consisting of an integrated preamplifier with a Sallen-Key Butterworth filter for very-high-frequency ultrasonic transducers and a low-power handheld receiver. This preamplifier was fabricated using a 0.18-μm 7WL SiGe bi-polar complementary metal oxide semiconductor (BiCMOS) process. The Sallen-Key filter is used to increase the voltage gain of the front-end circuit for high-frequency transducers which are generally low in sensitivity. The measured peak voltage gain of the frontend circuits for the BiCMOS preamplifier with the Sallen-Key filter was 41.28 dB at 100 MHz with a-6-dB bandwidth of 91%, and the dc power consumption of the BiCMOS preamplifier was 49.53 mW. The peak voltage gain of the front-end circuits for the CMOS preamplifier with the Sallen-Key filter was 39.52 dB at 100 MHz with a-6-dB bandwidth of 108%, and the dc power consumption of the CMOS preamplifier was 43.57 mW. Pulse-echo responses and wire phantom images with a single-element ultrasonic transducer have been acquired to demonstrate the performance of the front-end circuit.
authors: National Institutes of Health Resource Center for Medical Ultrasonic Transducer Technology and the Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, USA. qifazhou@usc.edu
authors: Hojong
authors: H
authors: Choi
authors: Xiang
authors: X
authors: Li
authors: Sien-Ting
authors: ST
authors: Lau
authors: ChangHong
authors: C
authors: Hu
authors: Qifa
authors: Q
authors: Zhou
authors: K Kirk
authors: KK
authors: Shung
mesh_terms: D000669:Amplifiers, Electronic; D011211:Electric Power Supplies; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation*; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation*; D008904:Miniaturization; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D018511:Systems Integration; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation*