Receive-noise analysis of capacitive micromachined ultrasonic transducers

Name: Receive-noise analysis of capacitive micromachined ultrasonic transducers
Author: Bozkurt, A., Yaralıoğlu, Göksen Göksenin

İsim	Receive-noise analysis of capacitive micromachined ultrasonic transducers
Yazar	Bozkurt, A., Yaralıoğlu, Göksen Göksenin
Basım Tarihi:	2016
Basım Yeri	- IEEE
Konu	Capacitive micromachined ultrasonic transducer (CMUT), Minimum detectable pressure, Mutual coupling, Radiation impedance, Thermal noise, Transimpedance amplifier
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	0885-3010
Kayıt Numarası	9f503c03-6060-42e9-91f7-032092210c09
Lokasyon	Electrical & Electronics Engineering
Tarih	2016
Notlar	TÜBİTAK
Örnek Metin	This paper presents an analysis of thermal (Johnson) noise received from the radiation medium by otherwise noiseless capacitive micromachined ultrasonic transducer (CMUT) membranes operating in their fundamental resonance mode. Determination of thermal noise received by multiple numbers of transducers or a transducer array requires the assessment of cross-coupling through the radiation medium, as well as the self-radiation impedance of the individual transducer. We show that the total thermal noise received by the cells of a CMUT has insignificant correlation, and is independent of the radiation impedance, but is only determined by the mass of each membrane and the electromechanical transformer ratio. The proof is based on the analytical derivations for a simple transducer with two cells, and extended to transducers with numerous cells using circuit simulators. We used a first-order model, which incorporates the fundamental resonance of the CMUT. Noise power is calculated by integrating over the entire spectrum; hence, the presented figures are an upper bound for the noise. The presented analyses are valid for a transimpedance amplifier in the receive path. We use the analysis results to calculate the minimum detectable pressure of a CMUT. We also provide an analysis based on the experimental data to show that output noise power is limited by and comparable to the theoretical upper limit.
DOI	10.1109/TUFFC.2016.2594079
Cilt	63

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Receive-noise analysis of capacitive micromachined ultrasonic transducers

Yazar Bozkurt, A., Yaralıoğlu, Göksen Göksenin

Basım Tarihi 2016

Basım Yeri - IEEE

Konu Capacitive micromachined ultrasonic transducer (CMUT), Minimum detectable pressure, Mutual coupling, Radiation impedance, Thermal noise, Transimpedance amplifier

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 0885-3010

Kayıt Numarası 9f503c03-6060-42e9-91f7-032092210c09

Lokasyon Electrical & Electronics Engineering

Tarih 2016

Notlar TÜBİTAK

Örnek Metin This paper presents an analysis of thermal (Johnson) noise received from the radiation medium by otherwise noiseless capacitive micromachined ultrasonic transducer (CMUT) membranes operating in their fundamental resonance mode. Determination of thermal noise received by multiple numbers of transducers or a transducer array requires the assessment of cross-coupling through the radiation medium, as well as the self-radiation impedance of the individual transducer. We show that the total thermal noise received by the cells of a CMUT has insignificant correlation, and is independent of the radiation impedance, but is only determined by the mass of each membrane and the electromechanical transformer ratio. The proof is based on the analytical derivations for a simple transducer with two cells, and extended to transducers with numerous cells using circuit simulators. We used a first-order model, which incorporates the fundamental resonance of the CMUT. Noise power is calculated by integrating over the entire spectrum; hence, the presented figures are an upper bound for the noise. The presented analyses are valid for a transimpedance amplifier in the receive path. We use the analysis results to calculate the minimum detectable pressure of a CMUT. We also provide an analysis based on the experimental data to show that output noise power is limited by and comparable to the theoretical upper limit.

DOI 10.1109/TUFFC.2016.2594079

Cilt 63