摘要:
A digital temperture compensation oscillator for digitally compensating a variation in oscillation frequency due to temperatures, by applying a compensation voltage to a voltage controlled oscillator, comprises temperature detection means, A/D conversion means, memory means, operation means and D/A conversion means. The temperature detection means detects temperatures when the voltage controlled oscillator is operated, and generates a temperature signal. The A/D conversion means receives the temperature signal, digitizes the temperature signal, and generates digital temperature data. The memory means stores compensation data corresponding to the compensation voltage as difference data at corresponding addresses. The difference data includes, when N-stage level difference data (N=a positive integer) are utilized, predetermined reference values of 0th difference data to (N-1)-th difference data of the compensation data and all N-th difference data. The operation means receives the digital temperature data and the difference data, and generates the compensation data on the basis of the difference data in response to the digital temperature data. The D/A conversion means receives the compensation data, converts the compensation data into an analog compensation voltage, and supplies the analog compensation voltage to the voltage controlled oscillator.
摘要翻译:一种数字温度补偿振荡器,其通过向压控振荡器施加补偿电压来对温度造成的振荡频率的变化进行数字补偿,包括温度检测装置,A / D转换装置,存储装置,操作装置和D / A转换装置 。 温度检测装置检测压控振荡器工作时的温度,并产生温度信号。 A / D转换装置接收温度信号,数字化温度信号,并产生数字温度数据。 存储装置将对应于补偿电压的补偿数据存储在相应地址处的差分数据。 差分数据包括当使用N级电平差数据(N =正整数)时,补偿数据的第0差分数据与第(N-1)个差分数据的预定参考值和所有第N个差分数据 。 操作装置接收数字温度数据和差分数据,并且响应于数字温度数据,基于差分数据生成补偿数据。 D / A转换装置接收补偿数据,将补偿数据转换成模拟补偿电压,并将模拟补偿电压提供给压控振荡器。
摘要:
A digital temperature-compensated oscillator comprises a crystal oscillator, a first memory previously storing digital temperature compensation data obtained by previously measuring the relation between the ambient temperatures and the frequency deviations of the crystal oscillator, a second memory for storing frequency offset amounts of the oscillation frequency of the crystal oscillator, a temperature sensor for outputting analog detection data relating to the ambient temperature, an A/D converter for converting the analog detection data to digital detection data, a readout circuit for reading out temperature compensation data corresponding to the digital detection data and stored in the first memory according to the digital detection data and reading out the frequency offset amount stored in the second memory according to the digital detection data, an operation circuit for effecting the following calculation by use of the readout temperature compensation data and readout frequency offset amount to derive digital control voltage,V.sub.c =V.sub.co +(K.sub.00 +V.sub.co K.sub.10 +K.sub.01 T).times.(.DELTA.F+.DELTA.F.sup.2 .times.K.sub.10 /2)where K.sub.00, K.sub.01 and K.sub.10 are constants, V.sub.co is an initial value of the control voltage, T is an ambient temperature and .DELTA.F is a frequency offset amount, a D/A converter for converting the digital control voltage into an analog control voltage, and a voltage-capacitance converter for receiving the analog control voltage and generating a control signal to be supplied to the crystal oscillator according to the received analog control voltage, wherein the frequency of the crystal oscillator is controlled according to the control signal.
摘要:
A design assistance device includes: a design information storage section configured to store design information containing at least information of slave devices and information of a topology in a network system in accordance with a design created by a user; an actual configuration information generation section configured to generate actual configuration information containing at least the information of the slave devices and the information of the topology in the actual network system; a comparison section configured to compare the design information and the actual configuration information; and an output section configured to generate a comparison screen indicating the respective configurations of the designed network system and the actual network system along with their commonalities and differences and outputting the comparison screen to a display device. Thus, a technology can be provided which assists the user to easily compare the designed network configuration and the actual machine's network configuration.
摘要:
A hot-rolled steel sheet has an average value of the X-ray random intensity ratio of a {100} to {223} orientation group at least in a sheet thickness central portion that is in a sheet thickness range of ⅝ to ⅜ from a steel sheet surface of 1.0 to 6.0, an X-ray random intensity ratio of a {332} crystal orientation of 1.0 to 5.0, rC which is an r value in a direction perpendicular to a rolling direction of 0.70 to 1.10, and r30 which is an r value in a direction that forms an angle of 30° with respect to the rolling direction of 0.70 to 1.10.
摘要:
Provided are an electrode, an electrolysis cell, and an electrochemical analyzer that improve the long-term stability of analysis data. A working electrode, a counter electrode, and reference electrode are disposed in an electrolysis cell. The working electrode is obtained by forming a lead wire in a composite material having platinum or a platinum alloy as a base material, in which a metal oxide is dispersed, or in a laminated material obtained by laminating a valve metal and platinum such that the cross sectional crystal texture in the thickness direction of the platinum is formed in layers and the thickness of each layer of the platinum is 5 micrometers or less. The metal oxide is selected from among zirconium oxide, tantalum oxide, and niobium oxide, and the metal oxide content of the platinum or the platinum alloy is 0.005 to 1 wt % in terms of the zirconium, tantalum, or niobium metal.
摘要:
A conductive paste includes a conductive powder containing at least one of copper and nickel as a main component, a glass frit, and an organic vehicle, wherein the glass frit is a tellurium-based glass frit that essentially does not contain any lead component and contains tellurium as a network former in an amount of 35 to 70 mol % in terms of oxide, the tellurium-based glass frit containing silver as an essential component. The above conductive paste can provide favorable characteristics and favorably be used in the formation of light-receiving surface electrodes of a solar cell element even when the conductive paste includes one or more of copper and nickel as its conductive component.
摘要:
A transmission system which couples a plurality of transmission devices to a control device includes a first transmission device which is one of the plurality of transmission devices; a first calculation circuit which calculates a first difference value indicating a frequency difference value between a common clock supplied from the control device and a first clock as a clock used in the first transmission device; and a transmitter which reports the first difference value to a second transmission device other than the first transmission device, wherein the second transmission device comprises: a second calculation circuit which calculates a second difference value indicating a frequency difference value between the common clock and a second clock used in the second transmission device, and a frequency controller which controls an oscillator generating the second clock so that the second difference value approaches the first difference value reported from the first transmission device.
摘要:
A parameter estimation device 600 includes: a communication throughput acquiring part 601 for acquiring communication throughput that is an amount of data transmitted per unit time; and a function specification parameter estimating part 602 for estimating a function specification parameter for specifying a probability density function where communication throughput at a second time point later than a first time point is a random variable, based on the communication throughput acquired by the first time point.
摘要:
According to one embodiment, a lubricant includes a perfluoropolyether having a chemical structure of: wherein Rf is at least one of: —CF2O(CF2CF2O)m(CF2O)nCF2— and —CF2CF2O(CF2CF2CF2O)kCF2CF2—, with m representing 0 or a positive integer, n representing 0 or a positive integer, and k representing 0 or a positive integer, and wherein R1 to R4 are selected from a group consisting of —H or with at least one of R1 to R4 being
摘要:
Provided are an electrode, an electrolysis cell, and an electrochemical analyzer that improve the long-term stability of analysis data. A working electrode, a counter electrode, and reference electrode are disposed in an electrolysis cell. The working electrode is obtained by forming a lead wire in a composite material having platinum or a platinum alloy as a base material, in which a metal oxide is dispersed, or in a laminated material obtained by laminating a valve metal and platinum such that the cross sectional crystal texture in the thickness direction of the platinum is formed in layers and the thickness of each layer of the platinum is 5 micrometers or less. The metal oxide is selected from among zirconium oxide, tantalum oxide, and niobium oxide, and the metal oxide content of the platinum or the platinum alloy is 0.005 to 1 wt % in terms of the zirconium, tantalum, or niobium metal.