Download or read book Research Work for Frequency Temperature Compensation Techniques for Quartz Crystal Oscillators in Conjunction with Signal Corps Technical Requirements Scl 6610b Dated 9 September 1963 written by BENDIX CORP DAVENPORT IA PIONEER-CENTRAL DIV. and published by . This book was released on 1964 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer program is presented that was successfully used to determine thermistor-resistor compensation networks. Examples are given and results of synthesizing a number of compensation networks are given. The computer program will solve for the thermistor-resistor values in the compensation network, the R1/R2 ratio of the network at all temperatures of interest; the error in R1/R2 of the synthesized network compared to the required R1/R2 ratio; and the resultant expected frequency error at each temperature. (Author).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1965 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Work for Frequency Temperature Compensation Techniques for Quartz Crystal Oscillators written by and published by . This book was released on 1964 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project is to evolve a practical approach to the temperature compensation of quartz crystal oscillators. The study will be concentrated on a nominal frequency of five megacycles, but will be generally applicable to AT cut quartz crystals of from 1 to 20 megacycles. The use of graphical analysis for TCXO design is discussed. The results of this investigation show that a graphical analysis will not be useable for very accurate compensation because of resolution and parameters that cannot be taken into account with graphs. The techniques for determining compensation networks are discussed. A new technique is described where diodes are used in conjunction with thermistor-resistor networks. The 5 x 10 to the minus 8th power, Group III, TCXO's are discussed. Results of the first compensation attempts are given. The compensation networks and techniques used are presented. (Author).
Download or read book Frequency Temperature Compensation Techniques for Quartz Crystal Oscillators written by and published by . This book was released on 1966 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work involves development of circuit techniques for the frequency temperature compensation of three quartz crystal oscillator groups. Development of a linearized network approach has led to the generation of three separate computer programs. The three programs offer varying degrees of compensation, based on increasing circuit complexity. Successful application of these programs has been made in compensating the Group II oscillators. In conjunction with the programming effort, a preliminary investigation has been made to determine the effects of component tolerances on compensation. The Group II oscillator design was refined, and the improved features were incorporated in the final assembly of the oscillators. Circuit function and performance details are included in this report. First order compensation of these three oscillators indicates that the desired stability characteristics will be achieved. The oscillator aging experiment was initiated using eight oscillators housed in a stabilized-temperature enclosure. Compensation of these oscillators will be made as soon as initial aging trends are determined. Frequency adjustment studies were continued and resulted in a trimming method utilized which provides minimal effect on the degree of compensation.
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 Frequency Temperature Compensation Technique for Quartz Crystal Oscillators written by Darrell E. Newell and published by . This book was released on 1969 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first section of the report discusses a new hybrid voltage regulator which is housed in a TO5 container. The regulator was specifically designed for utilization by TCXOs and consequently, contains desirable feature for this use. The second phase of the investigation covers the generation of various temperature environments. A ramp generator and interval generator have been developed. Temperature ramps have been generated at slopes varying from 6.165 to 0.057 C/min. The third section of the report covers a study of isolation amplifiers. Since TCXO size is of importance, it is desirable to use as few stages as possible. Consequently, if an isolation amplifier can be used to provide both isolation and some degree of gain satisfactorily, it may be possible to omit one gain stage. (Author).
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 Quartz Crystal Oscillator Vibration Measurements written by Mark Berry and published by . This book was released on 2001-02-01 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Army Research Laboratory (ARL), specifically the RF electronics Division of the Sensors and Electron Devices Directorate, has been tasked to become the Department of Defense (DoD) center for frequency control. As part of this program, ARL and others will develop frequency oscillators to be used as system clocks in munitions and other devices. ARL has assembled a test facility to measure the effects of vibration on frequency oscillators. This report discusses the results of vibration experiments on two quartz crystal oscillators, including verification of the measurement system and experimental setup.
