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1.发明授权公开(公告)号：US08476911B2
公开(公告)日：2013-07-02
申请号：US12927240
申请日：2010-11-10
CPC分类号： G01R27/2605 , G01R27/14 , G01R31/2882 , G01R31/2884
摘要： According to one disclosed embodiment, an on-chip resistor calibration circuit includes an RC oscillator having a test resistor and a precision capacitor as elements, a counter, and a reference clock. In one embodiment, an RC oscillator generates a waveform having a period dependent upon the resistance of the test resistor and the capacitance of the precision capacitor. In such an embodiment, a counter and a reference clock may be configured to measure the period of the waveform. Using a pre-determined capacitance of the precision capacitor, a resistance of the test resistor may be determined. In another embodiment, an RC oscillator generates first and second waveforms through use of an additional capacitor that can be switched in and out of the RC oscillator circuit. Using a pre-determined capacitance of the precision capacitor, an RC product of the test resistor and the additional capacitor may be determined.
摘要翻译： 根据一个公开的实施例，片上电阻校准电路包括具有测试电阻器和精密电容器作为元件的RC振荡器，计数器和参考时钟。 在一个实施例中，RC振荡器产生具有取决于测试电阻器的电阻和精密电容器的电容的周期的波形。 在这种实施例中，计数器和参考时钟可被配置为测量波形的周期。 使用精密电容器的预定电容，可以确定测试电阻器的电阻。 在另一个实施例中，RC振荡器通过使用可以进入和离开RC振荡器电路的附加电容器产生第一和第二波形。 使用精密电容器的预定电容，可以确定测试电阻器的RC乘积和附加电容器。
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2.发明申请公开(公告)号：US20120112773A1
公开(公告)日：2012-05-10
申请号：US12927240
申请日：2010-11-10
CPC分类号： G01R27/2605 , G01R27/14 , G01R31/2882 , G01R31/2884
摘要： According to one disclosed embodiment, an on-chip resistor calibration circuit includes an RC oscillator having a test resistor and a precision capacitor as elements, a counter, and a reference clock. In one embodiment, an RC oscillator generates a waveform having a period dependent upon the resistance of the test resistor and the capacitance of the precision capacitor. In such an embodiment, a counter and a reference clock may be configured to measure the period of the waveform. Using a pre-determined capacitance of the precision capacitor, a resistance of the test resistor may be determined. In another embodiment, an RC oscillator generates first and second waveforms through use of an additional capacitor that can be switched in and out of the RC oscillator circuit. Using a pre-determined capacitance of the precision capacitor, an RC product of the test resistor and the additional capacitor may be determined.
摘要翻译： 根据一个公开的实施例，片上电阻校准电路包括具有测试电阻器和精密电容器作为元件的RC振荡器，计数器和参考时钟。 在一个实施例中，RC振荡器产生具有取决于测试电阻器的电阻和精密电容器的电容的周期的波形。 在这种实施例中，计数器和参考时钟可被配置为测量波形的周期。 使用精密电容器的预定电容，可以确定测试电阻器的电阻。 在另一个实施例中，RC振荡器通过使用可以进入和离开RC振荡器电路的附加电容器产生第一和第二波形。 使用精密电容器的预定电容，可以确定测试电阻器的RC乘积和附加电容器。
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公开(公告)号：US20090196375A1
公开(公告)日：2009-08-06
申请号：US12427618
申请日：2009-04-21
申请人： Chin Ming Chien , Bojko F. Marholev
发明人： Chin Ming Chien , Bojko F. Marholev
CPC分类号： H03K4/502
摘要： Embodiments of the present invention provide an oscillator circuit having a steady output frequency that is independent of the supplied voltage. This oscillator includes a Schmitt trigger circuit which may be implemented within an integrated circuit of a wireless terminal or other like portable electronic device. The Schmitt trigger circuit receives a threshold voltage input and a second voltage input. The Schmitt trigger circuit generates an output voltage equal to either a first output voltage or a second output voltage based on the results of comparing the threshold voltage input to the second voltage input. An RC network may be coupled to the output of the Schmitt trigger circuit and is operable to supply the second voltage input to the Schmitt trigger circuit. A voltage divider network also couples to the output of the Schmitt trigger circuit wherein the threshold voltage input is proportional to the first output voltage reduced by the voltage divider network based on the output voltage of the Schmitt trigger circuit.
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公开(公告)号：US07529317B2
公开(公告)日：2009-05-05
申请号：US11236191
申请日：2005-09-27
申请人： Chin Ming Chien , Bojko F. Marholev
发明人： Chin Ming Chien , Bojko F. Marholev
IPC分类号： H04L27/00
CPC分类号： H03K4/502
摘要： Embodiments of the present invention provide an oscillator circuit having a steady output frequency that is independent of the supplied voltage. This oscillator includes a Schmitt trigger circuit which may be implemented within an integrated circuit of a wireless terminal or other like portable electronic device. The Schmitt trigger circuit receives a threshold voltage input and a second voltage input. The Schmitt trigger circuit generates an output voltage equal to either a first output voltage or a second output voltage based on the results of comparing the threshold voltage input to the second voltage input. An RC network may be coupled to the output of the Schmitt trigger circuit and is operable to supply the second voltage input to the Schmitt trigger circuit. A voltage divider network also couples to the output of the Schmitt trigger circuit wherein the threshold voltage input is proportional to the first output voltage reduced by the voltage divider network based on the output voltage of the Schmitt trigger circuit.
摘要翻译： 本发明的实施例提供一种具有稳定的输出频率的振荡器电路，其独立于所提供的电压。 该振荡器包括可在无线终端或其它类似便携式电子设备的集成电路内实施的施密特触发电路。 施密特触发电路接收阈值电压输入和第二电压输入。 基于比较输入到第二电压输入的阈值电压的结果，施密特触发电路产生等于第一输出电压或第二输出电压的输出电压。 RC网络可以耦合到施密特触发电路的输出，并且可操作以将第二电压输入提供给施密特触发电路。 分压网络还耦合到施密特触发电路的输出，其中阈值电压输入与基于施密特触发电路的输出电压的分压器网络降低的第一输出电压成比例。
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公开(公告)号：US08208584B2
公开(公告)日：2012-06-26
申请号：US12427618
申请日：2009-04-21
申请人： Chin-Ming Chien , Bojko F. Marholev
发明人： Chin-Ming Chien , Bojko F. Marholev
IPC分类号： H04L27/00
CPC分类号： H03K4/502
摘要： Embodiments of the present invention provide an oscillator circuit having a steady output frequency that is independent of the supplied voltage. This oscillator includes a Schmitt trigger circuit which may be implemented within an integrated circuit of a wireless terminal or other like portable electronic device. The Schmitt trigger circuit receives a threshold voltage input and a second voltage input. The Schmitt trigger circuit generates an output voltage equal to either a first output voltage or a second output voltage based on the results of comparing the threshold voltage input to the second voltage input. An RC network may be coupled to the output of the Schmitt trigger circuit and is operable to supply the second voltage input to the Schmitt trigger circuit. A voltage divider network also couples to the output of the Schmitt trigger circuit wherein the threshold voltage input is proportional to the first output voltage reduced by the voltage divider network based on the output voltage of the Schmitt trigger circuit.
摘要翻译： 本发明的实施例提供一种具有稳定的输出频率的振荡器电路，其独立于所提供的电压。 该振荡器包括可在无线终端或其它类似便携式电子设备的集成电路内实施的施密特触发电路。 施密特触发电路接收阈值电压输入和第二电压输入。 基于比较输入到第二电压输入的阈值电压的结果，施密特触发电路产生等于第一输出电压或第二输出电压的输出电压。 RC网络可以耦合到施密特触发电路的输出，并且可操作以将第二电压输入提供给施密特触发电路。 分压网络还耦合到施密特触发电路的输出，其中阈值电压输入与基于施密特触发电路的输出电压的分压器网络降低的第一输出电压成比例。
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