Crystal Oscillator Design and Temperature Compensation - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Crystal Oscillator Design and Temperature Compensation write by Marvin Frerking. This book was released on 2012-12-06. Crystal Oscillator Design and Temperature Compensation available in PDF, EPUB and Kindle. 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.
Design and Development of Frequency Temperature Compensated Quartz Crystal Oscillator 0-1227 ()/u
Design and Development of Frequency Temperature Compensated Quartz Crystal Oscillator 0-1227 ()/u - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Design and Development of Frequency Temperature Compensated Quartz Crystal Oscillator 0-1227 ()/u write by C. D. DOMINQUEZ. This book was released on 1965. Design and Development of Frequency Temperature Compensated Quartz Crystal Oscillator 0-1227 ()/u available in PDF, EPUB and Kindle. The need for ovenless quartz crystal oscillators having a deviation less than plus or minus 0.75 parts per million from an absolute frequency over all service conditions, including crystal aging, has been evident for modern communications systems. Knowledge derived from studies on frequecy temperature compensation techniques indicated the feasibility of developing compensated oscillators providing a reduction in both required input power and size over conventional oscillator-oven assemblies. The object of Phase I of this program was to design and fabricate seven exploratory development oscillator models employing such compensation techniques to achieve a frequency stability of less than plus or minus 0.5 ppm over the temperature range of -40C to +65C. This effort was reported in the Phase I Interim Report under this contract. After evaluation of these exploratory models, 18 advanced models were designed and fabricated under Phase II of this program with the same stability over 140C to +75C. This report covers the effort expended and the results obtained during Phase II of this program. The discussion in this report is related to (1) description and test of the Phase II oscillators, (2) design considerations in formulation of Phase II design, (3) component standardization, and (4) overall conclusions and recommendations for this program. (Author).
Frequency Temperature Compensation Techniques for Quartz Crystal Oscillators
Frequency Temperature Compensation Techniques for Quartz Crystal Oscillators - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Frequency Temperature Compensation Techniques for Quartz Crystal Oscillators write by . This book was released on 1966. Frequency Temperature Compensation Techniques for Quartz Crystal Oscillators available in PDF, EPUB and Kindle. 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.
An Improved Method of Temperature Compensation of Crystal Oscillators
An Improved Method of Temperature Compensation of Crystal Oscillators - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook An Improved Method of Temperature Compensation of Crystal Oscillators write by J. S. Wilson. This book was released on 1983. An Improved Method of Temperature Compensation of Crystal Oscillators available in PDF, EPUB and Kindle. A new method of temperature compensation of crystal oscillators has been developed. It is primarily intended for AT-cut crystal oscillators and offers advantages of higher stability, lower power consumption and smaller size compared with oscillators in current production. Compensation is achieved by generating a power series representation of the control voltage for a voltage controlled crystal oscillator. A bipolar integrated circuit has been designed which generates four voltages, each varying as a function of temperature. One voltage is constant while the others have a linear, quadratic and cubic variation with temperature. These voltages are similar in shape to the first four Chebyshev polynomials and the compensation voltage is obtained by summing the voltages in an operational amplifier. Prototype oscillators have been assembled which have a frequency tolerance of less than + or - 1ppm over the temperature band 85 deg C to -40 deg C. The current consumption of these oscillators is 1mA. (Author).
Design and Development of Frequency Temperature Compensated Quartz Crystal Oscillators, Phase i
Design and Development of Frequency Temperature Compensated Quartz Crystal Oscillators, Phase i - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Design and Development of Frequency Temperature Compensated Quartz Crystal Oscillators, Phase i write by Richard H. Bangert. This book was released on 1965. Design and Development of Frequency Temperature Compensated Quartz Crystal Oscillators, Phase i available in PDF, EPUB and Kindle. The need for ovenless quartz crystal oscillators having a deviation less than = 0.75 parts per million from an absolute frequency over all service conditions, including crystal aging, has become evident for modern communications systems. Current knowledge derived from studies on frequency temperature compensation techniques indicate the feasibility of combating the difficulties associated with frequency compensated oscillators to produce a reduction in both power and size over conventional oscillatoroven assemblies. The object of Phase I of this program is to design and fabricate seven exploratory development oscillator models operating at 3 mc and employing such compensation techniques to achieve a stability requirement of less than = 0.5 ppm over the temperature range of -40C to +65C. After evaluation of these exploratory models, eighteen advanced models incorporating the revisions required will be fabricated under Phase II of this program. This report covers only the effort expended in Phase I of this program. The significant problem areas were related to (1) development of a voltage regulator with good regulation throughout the temperature range, (2) evolution of a standard compensation network, (3) limitations in the state-of-the-art of crystal technology, (4) low power input requirement of 65 milliwatts, and (5) development of a constant gain amplifier using high tolerance components. (Author).
