A single-chip monolithic sonar system

Frederiksen, T.M.; Howard, W.

doi:10.1109/isscc.1974.1155270

Cited by 2 publications

(2 citation statements)

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“…This technique proposes to identify the arrival of an acoustic signal to the time where its amplitude exceeds a given amplitude level. Thresholding systems do not require any complex computations, but their precision can be degraded for low signal-tonoise ratio (SNR) [19], [29]- [32]. It is here proposed to perform the ToF estimation through a cross-correlation method [31]- [36] computed between the two parts (a) and (b) of the signal of Figure 5, respectively denoted x(t) and y(t).…”

Section: B Signal Processingmentioning

confidence: 99%

<inline-formula> <tex-math notation="LaTeX">$In~Situ$ </tex-math> </inline-formula> High-Resolution Measurement of HFR Nuclear Fuel Plates’ Spacing

Zaz¹,

Clézio²,

Dekious³

et al. 2018

IEEE Trans. Nucl. Sci.

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Most of the High Performance Research Reactors (HPRR) are made of plates undergoing a limited swelling during irradiation. Measuring the fuel thickness or the inter-plate distance is then a promissing way to obtain information on the fuel element irradiation history. The experimental constraints are however quite heavy due to the aimed resolution and the element geometry. In order to perform such measurements, a high resolution ultrasonic device was designed. It was thinned down to 1 mm in order to be inserted into the reactor water-channel. The system is then excited with a 120 MHz central frequency burst and the distance measurement is carried out through the ultrasonic waves' time of flight estimation. A series of experiments was performed on a full size irradiated fuel element of the "Institut Laue-Langevin" reactor proving the feasibility of real-time in-situ measurements.Index Terms-High frequency, high resolution, harsh environment, ultrasonic transducer, HPRR, RHF.

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Section: B Signal Processingmentioning

confidence: 99%

<inline-formula> <tex-math notation="LaTeX">$In~Situ$ </tex-math> </inline-formula> High-Resolution Measurement of HFR Nuclear Fuel Plates’ Spacing

Zaz¹,

Clézio²,

Dekious³

et al. 2018

IEEE Trans. Nucl. Sci.

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“…The power transistor with its collector connected to the output is ringed by a separate tub that is connected to V − . Its purpose is to collect these electrons [22], but the effectiveness of the ring is limited. About half the injected electrons reach the power-transistor tub that is connected to V + .…”

Section: Figure 13 When Safe-area Protection Activates With An Inducmentioning

confidence: 99%

A monolithic power op amp

Widlar¹,

Yamatake

1988

IEEE J. Solid-State Circuits

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The standard, junction-isolated power process has been modified by the addition of polycrystalline-film resistors to solve the topological problems encountered in making 90W, 80V, 10A power transistors and connecting them together for a push-pull output. An all-NPN output stage has been developed that holds cross-over distortion to 0.01-percent while driving a 4Ω load, even with the quiescent current below 20 mA. It is stable with all reactive loads and does not have the spurious-oscillation problems observed with the familiar quasi-complementary amplifier. These innovations are described along with the design of a complete power op amp. The all-important safe-area protection is covered in a companion article [1]. Preventing failures from substrate currents arising when the output is driven outside the supply by inductive loads is discussed here.

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A single-chip monolithic sonar system

Cited by 2 publications

References 0 publications

<inline-formula> <tex-math notation="LaTeX">$In~Situ$ </tex-math> </inline-formula> High-Resolution Measurement of HFR Nuclear Fuel Plates’ Spacing

<inline-formula> <tex-math notation="LaTeX">$In~Situ$ </tex-math> </inline-formula> High-Resolution Measurement of HFR Nuclear Fuel Plates’ Spacing

A monolithic power op amp

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