Production Engineering Measure for Temperature Compensated Microcircuit Crystal Oscillator PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Production Engineering Measure for Temperature Compensated Microcircuit Crystal Oscillator PDF full book. Access full book title Production Engineering Measure for Temperature Compensated Microcircuit Crystal Oscillator by Donald L. Thomann. Download full books in PDF and EPUB format.
Author: Donald L. Thomann Publisher: ISBN: Category : Languages : en Pages : 27
Book Description
The objective of this program is to establish a production capability for a microcircuit temperature compensated oscillator (MCTCXO) suitable for use as the reference oscillator in advanced FM communications equipment. Primary characteristics of the MCTCXO are small size, low power consumption, high reliability and frequency-temperature stability of + or -0.0000025 over the range of -40C to +80C. The contract will be accomplished in two steps. Step I will encompass the MCTCXO design, development engineering and fabrication of the tooling and production equipment necessary to obtain first article approval. A pilot run of 440 units (110 each of four frequencies) will be accomplished to verify production procedures, tooling and methods. The work in Step II will consist of all production planning necessary to expand the production rate to 100 units per eight hour shift on a mass production basis short of any procurements or actual manufacturing. The first quarterly report described the basic concept to be used in developing the MCTCXO as well as some circuit analysis. This report discusses the selection of the custom CMOS chip which will use silicon-on-sapphire technology in it's construction. Final CMOS specifications as well as specifications for the hybrid circuitry are included. (Author).
Author: Donald L. Thomann Publisher: ISBN: Category : Languages : en Pages : 27
Book Description
The objective of this program is to establish a production capability for a microcircuit temperature compensated oscillator (MCTCXO) suitable for use as the reference oscillator in advanced FM communications equipment. Primary characteristics of the MCTCXO are small size, low power consumption, high reliability and frequency-temperature stability of + or -0.0000025 over the range of -40C to +80C. The contract will be accomplished in two steps. Step I will encompass the MCTCXO design, development engineering and fabrication of the tooling and production equipment necessary to obtain first article approval. A pilot run of 440 units (110 each of four frequencies) will be accomplished to verify production procedures, tooling and methods. The work in Step II will consist of all production planning necessary to expand the production rate to 100 units per eight hour shift on a mass production basis short of any procurements or actual manufacturing. The first quarterly report described the basic concept to be used in developing the MCTCXO as well as some circuit analysis. This report discusses the selection of the custom CMOS chip which will use silicon-on-sapphire technology in it's construction. Final CMOS specifications as well as specifications for the hybrid circuitry are included. (Author).
Author: Donald L. Thomann Publisher: ISBN: Category : Languages : en Pages : 14
Book Description
The early examples of the silicon-on-sapphire C-MOS integrated circuit developed for the MCTCXO yielded excessive power consumption. Investigation showed the high power consumption to be directly related to the relatively low threshold voltage, Vth, of the C-MOS transistors on the integrated circuit. Integrated circuits were manufactured with higher values of threshold voltage which significantly reduced power consumption. (Author).
Author: Marvin Frerking Publisher: Springer Science & Business Media ISBN: 9401160562 Category : Science Languages : en Pages : 252
Book Description
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.
Author: T. Kudo Publisher: ISBN: Category : Languages : en Pages : 6
Book Description
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.
Author: C. D. Dominguez Publisher: ISBN: Category : Languages : en Pages : 24
Book Description
The purpose of this program was to advance circuit techniques for a new class of ovenless crystal oscillators having frequency temperature stabilities previously achieved in temperature stabilized oscillators consuming several watts of power. Two basic approaches to obtain computer optimized component values for a compensation network required to generate a desired non-linear voltage function, and hence achieve the desired degree of stability, are presented. Two groups of oscillator units, one group built to achieve a design goal frequency stability of + or -1 x 10 to the minus 7th power over the ambient temperature range of -40 C to +75 C and the other group built to achieve a design goal frequency stability of + or -5 x 10 to the minus 8th power over the ambient temperature range of -5 C to approximately +85 C, are discussed. (Author).
Author: Publisher: ISBN: Category : Languages : en Pages : 83
Book Description
Production techniques are being established for a thick film hybrid microelectronic 17-22 MHz, temperature-compensated, voltage-controlled crystal oscillator. In the engineering phase of the program, the redesign of the VCXO and TCFG substrates to relieve corral dimension and circuit density problems has been completed. The first lot of engineering samples has progressed through pre-aging electrical testing, and 5 units were undergoing aging at the close of the period. These units are non-conforming, having been assembled prior to the redesign effort. Units using redesigned substrates are in process. (Author).
Author: J. S. Wilson Publisher: ISBN: Category : Languages : en Pages : 6
Book Description
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).
Author: R. Michel Zilberstein Publisher: ISBN: Category : Languages : en Pages : 210
Book Description
Production techniques have been established for a thick-film hybrid Microelectronic 17-22 MHz, temperature-compensated, voltage controlled quartz crystal oscillator. The program requirements, the plans for meeting those requirements, the technical approach pursued and the technical work accomplished are described. The program was subdivided into an Engineering Phase and a Production phase. The Engineering phase consisted of the following steps: the breadboard analysis of the TCVCXO electrical design; the configuration design of the TCVCXO module; the detailed layout design of the hybrid microcircuity used in the TCVCXO module; the detailed design of piece parts to be used to seal the hybrid microcircuits and to encapsulate the modules; the establishment of process flow plans to produce the modules; and the selection, characterization, and procurement of component parts and materials required for the production of the TCVCXO modules. The Production phase involved the development of tooling and manufacturing techniques needed to achieve the program requirements; and the delivery of completed modules in accordance with the program schedule. (Author).
Author: Donald L. Thomann
Author: Donald L. Thomann
Author: Donald L. Thomann
Author: Marvin Frerking
Author: T. Kudo
Author: C. D. Dominguez
Author: 
Author: J. S. Wilson
Author: Nicolo Testi
Author: G. A. Warwick
Author: R. Michel Zilberstein