Download or read book A New Digital TCXO Temperature Compensated Crystal Oscillators Circuit Using a Capacitor Switch Array written by T. Uno and published by . This book was released on 1983 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, Digital TCXOs have been studied extensively, because of their high stability and rapid start-up time. However, they have the disadvantages of large circuit scale and high power dissipation. To solve these problems, it is necessary to develop an LSI circuit for TCXOs. This paper describes a new digital TCXO structure suitable for a C-MOS integrated circuit. A new and simple temperature compensation algorithm is also proposed. The TCXO circuit proposed here has a new crystal oscillation circuit directly controlled by a digital signal. This makes it possible to eliminate D/A converter and varactor diode used in conventional digital TCXOs. The new oscillation circuit is composed of an amplifer, a quartz resonator and a capacitor-switch array.
Download or read book Crystal Oscillator Design and Temperature Compensation written by Marvin Frerking and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crystal oscillators have been in use now for well over SO years-one of the first was built by W. G. Cady in 1921. Today, millions of them are made every year, covering a range of frequencies from a few Kilohertz to several hundred Mega hertz and a range of stabilities from a fraction of one percent to a few parts in ten to the thirteenth, with most of them, by far, still in the range of several tens of parts per million.Their major application has long been the stabilization of fre quencies in transmitters and receivers, and indeed, the utilization of the frequency spectrum would be in utter chaos, and the communication systems as we know them today unthinkable,'without crystal oscillators. With the need to accommodate ever increasing numbers of users in a limited spectrum space, this traditional application will continue to grow for the fore seeable future, and ever tighter tolerances will have to be met by an ever larger percentage of these devices.
Download or read book International Conference on VLSI and CAD written by and published by . This book was released on 1999 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A New Frequency Temperature Compensation Method for Oscillators written by T. Kudo and published by . This book was released on 1983 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes a new frequency temperature compensation method for crystal oscillators. The method is applicable to resonators with second order or third order frequency temperature characteristics. Hence, an oscillator with an AT cut, a BT cut crystal unit or a surface acoustic wave resonator (SAWR) can be efficiently compensated. A conventional temperature compensated crystal oscillator (TCXO) uses an expensive variable capacitance diode (varactor) with good linearity as well as many thermistors. Considerable efforts have been devoted to developing a new reactance circuit to replace the varactor. It was found that a series circuit, involving a capacitor and a silicon diode, has the same characteristics as a varactor, and its linearity could be easily adjusted. In the case of an AT cut crystal unit with third order frequency temperature characteristics, compensation over a wide temperature range can be achieved by using two series circuits.
Download or read book Precision Frequency Control Oscillators and standards written by Eduard A Gerber and published by . This book was released on 1985 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1990-08 with total page 898 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temperature Compensated Crystal Oscillator TCXO Design Aids Frequency Temperature Resonator Characteristics as Shifted by Series Capacitors written by Arthur Ballato and published by . This book was released on 1977 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resonators for TCXO application are required to have accurately-characterized frequency-temperature (f-T) curves and equivalent network parameters. This report describes how the circuit parameters, critical resonator frequencies, and temperature coefficients depend on material constants of the crystal and geometrical factors. These constants are tabulated for AT- and SC-cut quartz. It further explains the observed f-T curve shift between resonator operation with and without series load capacitors. Simple relations are given for treating this effect, along with charts and other design aids. These are used in a practical example involving an AT-cut resonator for a typical TCXO application. (Author).
Download or read book Government Reports Annual Index written by and published by . This book was released on 1984 with total page 1316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Externally Compensated Crystal Oscillator ECXO Study written by O. J. Baltzer and published by . This book was released on 1984 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this contract was an investigation and exploratory development of an externally compensated crystal oscillator (EXCO) in which frequency-temperature compensation of the C-mode frequency of an SC-cut quartz crystal is achieved by utilizing the concurrent B-mode frequency as a highly sensitive digital temperature sensor. The digitized B-mode output, used in conjunction with a microcomputer and a stored frequency/temperature look-up table or a suitable compensation algorithm, is able to provide precise and accurate clock corrections over a much wider range than that possible with a conventional TCXO oscillator (a temperature compensated oscillator which employs a voltage-variable capacitor for direct oscillator frequency control).
Download or read book Comparison Among Precision Temperature Compensated Crystal Oscillators written by and published by . This book was released on 2005 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are different precision temperature compensated crystal oscillators showing the frequency-temperature stability better than 1x10( -6) in a very wide temperature range. To choose the suitable oscillator one should consider its frequency-temperature stability, power consumption, size, cost, phase noise and other specifications. According to a lot of experiments and comparisons, as the precision TCXO, double compensated TCXO which combines analog and digital compensation approaches together is more competitive in cost, size, stability and mass production compared with ordinary precision TCXO, DTCXO and MCXO based on AT cut crystals. It is difficult to use ordinary TCXO to get a very good frequency-temperature stability, but its repeatability can be good with suitable components and circuits, and quantization error does not exist in it. Therefore it is possible to be compensated further.
Download or read book A New Approach to a High Stability Temperature Compensated Crystal Oscillator written by S. Schodowski and published by . This book was released on 1970 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes a compensation approach based on the introduction of controlled nonlinearity into the TCXO's frequency-voltage tuning characteristic by using a pair of varactor diodes and a fixed bias source. The result is considerable simplification of the temperature-compensation process for a TCXO using a fundamental AT-cut crystal unit. The simplification comes about by transformation of portion of the classic cubic voltage correction function to a monotonic function which then can be approximated to a high degree of accuracy with one or two '3-point' network segments, using a given thermistor in each. A stability of plus or minus 5 x 10 to the minus 8th power (5 to 80C) was obtained in one case where the required monotonic compensation function was generated in two segments. In another example, a stability of plus or minus 1 x 10 to the minus 8th power was easily obtained by compensating over a plus or minus 10C range about the upper turnover temperature. (Author).
Download or read book Open Circuits written by Windell Oskay and published by No Starch Press. This book was released on 2022-11-01 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: Open Circuits is a photographic exploration of the beautiful design inside everyday electronics. Its stunning cross-section photography unlocks a hidden world full of elegance, subtle complexity, and wonder. Our phones, computers, and appliances are made of hundreds of internal components, each precisely engineered to perform a certain function, but none intended to actually be seen. Through painstakingly executed, vividly detailed cross-section photography, Open Circuits reveals the surprising—and often accidental—beauty hiding inside the electronic components that drive our everyday devices. From resistors to LEDs, USB cables to headphone jacks, stepper motors to nixie tubes, the book’s arresting imagery transforms more than 130 components into delightful works of art. As you visually dissect the components’ insides, you’ll learn about how they work and how they were made. Open Circuits has something for everyone to appreciate, whether you’re a seasoned electrical engineer, an amateur tinkerer, or simply a lover of art and photography.
Download or read book Pll Performance Simulation and Design written by Dean Banerjee and published by Dog Ear Publishing. This book was released on 2006-08 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended for the reader who wishes to gain a solid understanding of Phase Locked Loop architectures and their applications. It provides a unique balance between both theoretical perspectives and practical design trade-offs. Engineers faced with real world design problems will find this book to be a valuable reference providing example implementations, the underlying equations that describe synthesizer behavior, and measured results that will improve confidence that the equations are a reliable predictor of system behavior. New material in the Fourth Edition includes partially integrated loop filter implementations, voltage controlled oscillators, and modulation using the PLL.
Download or read book The Art of Electronics written by Paul Horowitz and published by . This book was released on 2021 with total page 1227 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electronic Design s Gold Book written by and published by . This book was released on 1978 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EEM written by and published by . This book was released on 1985 with total page 1778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Quantum Metrology written by Waldemar Nawrocki and published by Springer. This book was released on 2015-03-24 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the theory of quantum effects used in metrology and results of the author’s own research in the field of quantum electronics. The book provides also quantum measurement standards used in many branches of metrology for electrical quantities, mass, length, time and frequency. This book represents the first comprehensive survey of quantum metrology problems. As a scientific survey, it propagates a new approach to metrology with more emphasis on its connection with physics. This is of importance for the constantly developing technologies and nanotechnologies in particular. Providing a presentation of practical applications of the effects used in quantum metrology for the construction of quantum standards and sensitive electronic components, the book is useful for a wide audience of physicists and metrologists in the broad sense of both terms. In 2014 a new system of units, the so called Quantum SI, is introduced. This book helps to understand and approve the new system to both technology and academic community.
