Development of Integrated Preamplifier for High-Frequency Ultrasonic Transducers and Low-Power Handheld Receiver

作者：Choi Hojong^*; Li Xiang; Lau Sien Ting; Hu ChangHong; Zhou Qifa; Shung K Kirk

来源：IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2011, 58(12): 2646-2658.

DOI：10.1109/TUFFC.2011.2127

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-mu m 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 front-end 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.

• 出版日期2011-12