RF transformers for ultrasonic
نویسندگان
چکیده
Performance of electrical matching of an ultrasonic transducer to the excitation generator is analyzed. The analysis is based on a transducer measured impedance. Real power supplied to the ultrasonic transducer is one of evaluation criteria. The obtainable bandwidth as well as it’s product with a real power supplied are assigned as the alternative performance evaluation criteria. Effective bandwidth is adopted from radiolocation as one of criteria. Most popular matching circuits are analyzed using the mentioned criteria. Algorithms for matching network selection are presented.
منابع مشابه
The RF transformer application for ultrasound excitation: the initial study
Practical aspects of design and application radio frequency (RF) transformers in an ultrasonic system excitation channel are analysed. Design steps are discussed for those willing to design their own transformer an for excitation channel. Investigation has been carried out on what generator parameters can be obtained if instead of a purely active output stage the impedance matching RF transform...
متن کاملHigh performance MEMS 0.18 μm RF-CMOS transformers
This work presents a micromachined RF-CMOS transformer fabricated in a commercially available 0.18μm CMOS process. Maskless micromachining post-processing is used to remove oxide and substrate material from around the transformer, reducing parasitic effects and improving the performance of the transformer. Index Terms — baluns, CMOS integrated circuits; MEMS, maskless micromachining, Q enhancem...
متن کاملUltrasonic Sensor Amplifier Circuit
Ultrasonic receiver circuit with Phase-locked loop 4046 Ultrasonic amplifier with high amplification factor · Transformer-coupled ultrasonic transmitter circuit. General-Purpose CMOS Rail-to-Rail Amplifier. ADP7104. 20 V, 500 mA, Low The circuit shown in Figure 1 is a completely self-contained distance sensor that utilizes an ultrasonic transmitter and sensitive analog receiver in conjunction.
متن کاملFabrication of High Frequency (25–75 MHz) Single Element Ultrasonic Transducers
The design and fabrication of high frequency single element ultrasonic transducers present a multitude of challenges for the transducer engineer, from size constraints to electrical impedance matching. This paper discusses the trade-offs involved in procedures used to fabricate lithium niobate (LiNbO3) and lead titanate (PbTiO3) transducers in the 25MHz to 75MHz range. Transducers of varying di...
متن کاملPhysico-Acoustic Study on Thermal Conductivity of Silver Nanofluid
Low transmission of heat is one of the major problems for heat exchanger fluids in many industrial and scientific applications. This includes cooling of the engines, high power transformers to heat exchangers in solar hot water panels or in refrigeration systems. In order to tackle these problems in thermal industries, nanofluids could play a significant role as excellent heat exchanger materia...
متن کامل