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analog/digital converters

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Published: 01 August 2018
Fig. 17 Schematic diagram of flux-controlled dipole probe showing feedback loop and U-core electromagnet with the excitation (Ex), feedback (F), and pick-up (P) coil. ADC, analog-to-digital converter; PC, personal computer; DAC, digital-to-analog converter; V ref , reference voltage; V ex More
Image
Published: 01 January 2003
Fig. 2 Design of microcircuit containing integrated potentiostat/autoranging zero-resistance ammeter (ZRA), analog-to-digital and digital-to-analog (A/D-D/A) converters, and three on-chip electrodes. Size is about 4 × 6 mm (0.16 × 0.24 in.). Source: Ref 10 More
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006459
EISBN: 978-1-62708-190-0
... to a digital, computerized image, the IP is scanned with a red light, stimulating the PSL to emit blue light. The PSL emissions are collected by optical filtering and converted to analog electrical signals. These electrical signals represent the proportionality of the x-ray intensity at each location...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001237
EISBN: 978-1-62708-170-2
... quantitative image analysis systems driven by personal computers can handle complex images quickly and accurately, with resolutions comparable to those of the human eye. The most economical image systems convert an analog camera signal to a digital signal through a hardware processor. Although digital cameras...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005153
EISBN: 978-1-62708-186-3
... of digital controllers, analog sensor signals are converted to digital form using analog-to-digital converters (A/D), while the digital control output of the microprocessor is converted into an analog signal using digital-to-analog (D/A) converters. Analog controllers have the advantage of being...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001091
EISBN: 978-1-62708-162-7
... Circuits Although ICs currently represent as smaller share of the GaAs market than optoelectronic devices, they are considered to have potential for greater growth. Two types of ICs are produced commercially: analog and digital. Analog ICs are designed to process signals generated by radar...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001236
EISBN: 978-1-62708-170-2
... via an analog-to-digital converter. At this point the transducer contains only the vertical or Z-component of the profile. The horizontal or X-component generated by the traversing mechanism is combined with the Z-component to produce the “total profile.” The total profile is then filtered to remove...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006469
EISBN: 978-1-62708-190-0
... equipment manufacturers, all general-purpose units consist of a power supply, a pulser circuit, a search unit, a receiver-amplifier circuit, high-integrity analog-to-digital data conversion, and now in many cases, a touch screen and display, all coordinated using an electronic clock or calibrator. Advances...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006472
EISBN: 978-1-62708-190-0
... in the system. Analog-to-digital conversion of waveforms should have sampling rates at least four times that of the nominal frequency of the probe. When digital signal processing is to be carried out on the raw data, this should be increased to eight times the nominal frequency of the probe. The data...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003757
EISBN: 978-1-62708-177-1
... in the sequence considers the terms used to describe how an image of a real object is converted to a set of digital information, instruments used accomplish this, and file and format convention. Digitization Basics Digitization is the first step of the sequence. An analog signal representing the image goes...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006336
EISBN: 978-1-62708-179-5
... image. A thicker part generates more scattered radiation (a component of geometric unsharpness). Most radiation detectors fall into three categories: film (analog), computed radiography (digital), and digital radiography (digital). Film is historically the most commonly used radiation detector. Film...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003199
EISBN: 978-1-62708-199-3
... of the transmitter has similar qualifications. Measurement instruments are classified by their displays (analog or digital) and whether they are recording or nonrecording types. Analog displays include meters and motor-driven pointers. Analog strip-chart or round-chart recorders include analog temperature...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005838
EISBN: 978-1-62708-167-2
... the voltages or currents delivered to both switches and must have a high coupling coefficient as suggested by the magnetic core. L, inductor; CT, center tapped The constant-current analogy ( Fig. 12b ) is rarely seen. Where the constant-voltage form doubles voltage while conserving current, this circuit...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001337
EISBN: 978-1-62708-173-3
... the line frequency and require a larger output inductor, L . Because welding current is analog in nature, it has traditionally been adjusted with analog circuitry via rheostats and potentiometers. Recent advances allow digital control with microprocessors and dedicated software; tight-tolerance...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006439
EISBN: 978-1-62708-190-0
... pixel as an electronic signal. This signal can be read at only one corner of the sensor matrix. Thus, all light information is moved across the surface of the sensor and read at one corner of the sensor matrix. A subsequent analog-to-digital converter converts each electronic signal into digital...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002475
EISBN: 978-1-62708-194-8
... Abstract This article presents an overview of the electric and magnetic parameters and discusses the significance of these parameters for electronic applications. It describes the components of analog and digital electronic circuits. The article reviews the augmenting technologies: magnetic...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005931
EISBN: 978-1-62708-166-5
.... Sensors in a PLC System A wide range of sensors can be integrated into a PLC system, ranging from simple on/off devices, such as limit switches, to more complex signals, such as thermocouples and vacuum gages. There are two main categories of sensors: digital or discrete and analog or continuous...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003314
EISBN: 978-1-62708-176-4
... of an ultrasonic (920 kHz) fatigue testing machine with mean load capability. 1, converter; 2, booster horn; 3, connecting horn; 4, specimen; 5, capacitance gage; 6, cooling ring; 7, four air inlets; 8, venturi air cooler; 9, air supply; 10, upper and lower support plates; 11, hydraulic pistons; 12, window; 13...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003238
EISBN: 978-1-62708-199-3
...) systems. In fact, industrial CT systems are used to obtain digital radiographs. The imaging performance with detector arrays is also comparable with that of computed tomography ( Table 5 ). After analog image processing, the images can be digitized for further image enhancement. This digitization...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003653
EISBN: 978-1-62708-182-5
.... The microinstrument can be incorporated in on-line testing systems by attaching them to actual parts of interest. Fig. 2 Design of microcircuit containing integrated potentiostat/autoranging zero-resistance ammeter (ZRA), analog-to-digital and digital-to-analog (A/D-D/A) converters, and three on-chip...