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公开(公告)号：EP2854293A1
公开(公告)日：2015-04-01
申请号：EP13186717.8
申请日：2013-09-30
申请人： Micro Crystal AG
发明人： Ruffieux, David , Scolari, Nicola
IPC分类号： H03K5/135 , G04F5/00 , G06F1/04 , H03K19/003
CPC分类号： H03K5/135 , G04G3/04 , G06F1/04 , H03K19/00369
摘要： The temperature compensated timing signal generator comprises a crystal oscillator (12; 112) configured to generate a reference time signal, and a divider circuit (14, 114) arranged to receive the reference time signal as input and to output a coarse time unit signal, the coarse time unit signal having an actual frequency deviating from a desired frequency as a function of temperature of said crystal oscillator. The signal generator also includes a high frequency oscillator (16; 116) configured to generate an interpolation signal having a frequency (f RC ) greater than the frequency (f XT ) of the crystal oscillator. A finite state machine (24; 124) computes a deviation compensating signal as a function of temperature, the signal comprises an integer part representative of an integer number of pulses to be inhibited or injected in the divider circuit (14; 114) and a fractional part representative of how much the output of a new time unit signal pulse should further be delayed in order to compensate for any remaining deviation.
摘要翻译： 温度补偿定时信号发生器包括被配置为产生参考时间信号的晶体振荡器（12; 112）和被布置为接收参考时间信号作为输入并分配粗略时间单位信号的分频器电路（14,114） 所述粗略时间单位信号具有与作为所述晶体振荡器的温度的函数的期望频率偏离的实际频率。 信号发生器还包括被配置为产生具有大于晶体振荡器的频率（f XT）的频率（f RC））的内插信号的高频振荡器（16; 116）。 有限状态机（24; 124）计算作为温度的函数的偏差补偿信号，所述信号包括表示要在所述除法器电路（14; 114）中被抑制或注入的整数个脉冲的整数部分，以及分数 部分代表新时间单位信号脉冲的输出应进一步延迟多少以补偿任何剩余偏差。
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32.发明公开Silicon-based oscillator for a downhole toolsystem made therewith 审中-公开硅酸盐玻璃矾土矾土ürürt t t t t t t t t t t t t t t t
公开(公告)号：EP2741151A1
公开(公告)日：2014-06-11
申请号：EP12306531.0
申请日：2012-12-06
申请人： Services Pétroliers Schlumberger , SCHLUMBERGER TECHNOLOGY B.V. , Schlumberger Holdings Limited , PRAD Research and Development Limited
摘要： Systems, methods, and assemblies to provide clock signals to electrical components of downhole tools are provided. In one example, an oscillator assembly may include a silicon-based oscillator having a variable capacitor circuit. The silicon-based oscillator may provide an output signal at a frequency within a range of frequencies. The oscillator assembly may also include control circuitry electrically coupled to the silicon-based oscillator. Moreover, the control circuitry may include a temperature input that receives a temperature corresponding to the silicon-based oscillator. The control circuitry may also include a control signal output electrically coupled to the silicon-based oscillator. The control signal output may be used to change a capacitance of the variable capacitor circuit based on the temperature received by the temperature input to maintain the output signal of the silicon-based oscillator within the range of frequencies.
摘要翻译： 提供了向井下工具的电气部件提供时钟信号的系统，方法和组件。 在一个示例中，振荡器组件可以包括具有可变电容器电路的硅基振荡器。 硅基振荡器可以在频率范围内的频率处提供输出信号。 振荡器组件还可以包括电耦合到硅基振荡器的控制电路。 此外，控制电路可以包括接收与硅基振荡器相对应的温度的温度输入。 控制电路还可以包括电耦合到硅基振荡器的控制信号输出。 控制信号输出可以用于基于由温度输入接收的温度来改变可变电容器电路的电容，以将硅基振荡器的输出信号保持在频率范围内。
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33.发明公开
公开(公告)号：EP1681608A3
公开(公告)日：2009-03-04
申请号：EP06003153.1
申请日：1998-03-03
CPC分类号： G04F5/10 , G04G3/04 , G04G19/00 , G05F1/468 , G05F1/56 , G05F1/618 , G05F3/242 , H03B5/36 , H03K3/011 , H03K3/0307 , H03K3/3545
摘要： An electronic circuit has a supply voltage generation circuit (100) and a crystal oscillation circuit (10) driven the supply voltage generation circuit (100). The supply voltage generation circuit (100) comprises: a first voltage generation circuit (110) for creating a reference voltage (Vref1), and a second voltage generation circuit (130) for creating said supply voltage (Vreg) to have a predetermined relationship with said reference voltage (Vref1). The second voltage generation circuit (130) comprises: a differential amplifier (140) for amplifying the difference between said reference voltage (Vref1) and a comparison voltage (Vref2); a constant-current source (150-2); a circuit having a voltage-control transistor (132) to which the constant current of said constant-current source (150-2) is supplied, and which has one end connected to said constant-current source (150-2); and an output transistor (134) which is connected between another end of said voltage-control transistor (132), and a circuit node being at a predetermined second potential, the resistance of said output transistor (134) being controlled by the output of said differential amplifier. The comparison voltage (Vref2) is output from said one end of said voltage-control transistor (132), using a first potential as reference, while said supply voltage (Vreg) is output from said other end of said voltage-control transistor (132). The constant current is set to a value within a saturated operating region of the voltage-control transistor (132), so that the sum of the magnitude of variation of potential difference between said comparison voltage (Vref2) and said supply voltage (Vreg) which are potentials at respective ends of said voltage-control transistor (132) with a variation of temperature within a guaranteed operating temperature range and one of the magnitude of variation of said reference voltage (Vref1) of said first voltage generation circuit (110) with a variation of temperature within a guaranteed operating temperature range and the magnitude of variation of said comparison voltage (Vref2) of said voltage-control transistor (132) with a variation of temperature within a guaranteed operating temperature range, is the same as the magnitude of variation of an oscillation-stopping voltage Vsto of said crystal oscillation circuit (10) with a variation of temperature within a guaranteed operating temperature range.
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公开(公告)号：EP0683443B1
公开(公告)日：2000-11-22
申请号：EP95107699.1
申请日：1995-05-19
申请人： NEC CORPORATION
发明人： Komoda, Motoyoshi
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35.发明公开
公开(公告)号：EP0915409A4
公开(公告)日：2000-05-10
申请号：EP98905735
申请日：1998-03-03
申请人： SEIKO EPSON CORP
IPC分类号： G04G19/00 , G04G99/00 , G05F1/46 , G05F1/56 , G05F1/618 , G05F3/24 , G04C10/00 , G04G1/00 , H03B5/04
CPC分类号： G04F5/10 , G04G3/04 , G04G19/00 , G05F1/468 , G05F1/56 , G05F1/618 , G05F3/242 , H03B5/36 , H03K3/011 , H03K3/0307 , H03K3/3545
摘要： A constant-voltage generating circuit (100) which generates a constant voltage. The circuit (100) incorporates a first voltage generating circuit (110) which generates a reference voltage, and a second voltage generating circuit (130) which generates the constant voltage having a specified correlation with the reference voltage. The first voltage generating circuit (110) incorporates a first constant-current source (150-1) which supplies a constant current and a first transistor (112) for controlling voltage which is supplied with the above-mentioned constant current and outputs the above-mentioned reference voltage set on the basis of a prescribed potential. The constant current is set at the value of the saturated operating area of the first transistor (112) for controlling voltage.
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公开(公告)号：EP0683443A2
公开(公告)日：1995-11-22
申请号：EP95107699.1
申请日：1995-05-19
申请人： NEC CORPORATION
发明人： Komoda, Motoyoshi
摘要： An electronic clock comprises a usual oscillator (4) and a more accurate oscillator (1). The usual oscillator (4) generates a first frequency (Fx) which causes the electronic clock to operate and the more accurate oscillator (1) generates a second frequency (Fo) which is used as a reference frequency. Referring to the second frequency, the first frequency (Fx) is measured by a frequency measurement circuit (3) and a deviation (D) of the first frequency from a design frequency (F D ) is calculated by a processor (6). According to the deviation, time correction of the electronic clock is performed. Therefore, even if an actual oscillation frequency of the usual oscillator (4) is not stable precisely, the accurate time correction can be achieved.
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