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    • 1. 发明申请
    • Oven Controlled MEMS Oscillator Device
    • 烤箱控制MEMS振荡器装置
    • US20120305542A1
    • 2012-12-06
    • US13150499
    • 2011-06-01
    • Stephane DonnayXavier RottenbergJonathan BorremansHendrikus TilmansGeert van der PlasMichiel Pertijs
    • Stephane DonnayXavier RottenbergJonathan BorremansHendrikus TilmansGeert van der PlasMichiel Pertijs
    • A21B1/02
    • H03L1/022H03L1/04
    • A system is disclosed that includes an oven and a micromechanical oscillator inside the oven configured to oscillate at a predetermined frequency at a predetermined temperature, where the predetermined frequency is based on a temperature dependency and at least one predetermined property. The system further includes an excitation mechanism configured to excite the micromechanical oscillator to oscillate at the predetermined frequency and a temperature control loop configured to detect a temperature of the micromechanical oscillator using resistive sensing, determine whether the temperature of the micromechanical oscillator is within a predetermined range of the predetermined temperature based on the temperature dependency and the at least one predetermined property in order to minimize frequency drift, and adapt the temperature of the micromechanical oscillator to remain within the predetermined range. The system further includes a frequency output configured to output the predetermined frequency of the micromechanical oscillator.
    • 公开了一种系统,其包括烘箱内部的微机械振荡器,其配置成在预定频率以预定温度振荡,其中预定频率基于温度依赖性和至少一个预定特性。 该系统还包括激励机构,其被配置为激励微机械振荡器以预定频率振荡;以及温度控制回路,其被配置为使用电阻感测来检测微机械振荡器的温度,确定微机械振荡器的温度是否在预定范围内 基于温度依赖性和至少一个预定特性,以便使频率漂移最小化,并使微机械振荡器的温度保持在预定范围内。 该系统还包括被配置为输出微机械振荡器的预定频率的频率输出。
    • 4. 发明申请
    • Micro electromechanical device with stress and stress gradient compensation
    • 具有应力和应力梯度补偿的微机电装置
    • US20070069605A1
    • 2007-03-29
    • US11453697
    • 2006-06-15
    • Gerrit KlaasseHendrikus Tilmans
    • Gerrit KlaasseHendrikus Tilmans
    • H02N1/00H01L41/00
    • B81B3/0072B81B2201/016H01L41/0933H02N1/002
    • Micro electromechanical devices and methods for designing such devices are disclosed. An example micro electromechanical device includes at least two anchors. The example device also includes a floating element. The floating element extends between the at least two anchors and includes a predetermined reference portion. In at least one predetermined state during operation of the device, the reference portion is located within a predetermined reference plane. The floating element includes at least two flexible sections, where the at least two flexible sections each extends between the reference portion and a respective one of the anchors. In the example device, at least two of the at least two flexible sections include respective stress relieving elements. The stress relieving elements enable deflection of the floating element as a result of a stress gradient. The stress relieving elements are provided at predetermined locations between the respective anchors and the reference portion, where the predetermined locations are selected such that the reference portion is substantially located within the predetermined reference plane in the at least one predetermined state of the device.
    • 公开了用于设计这种装置的微机电装置和方法。 示例性微机电装置包括至少两个锚。 示例设备还包括浮动元件。 浮动元件在至少两个锚固件之间延伸并且包括预定的参考部分。 在设备运行期间的至少一个预定状态下,参考部分位于预定的参考平面内。 浮动元件包括至少两个柔性部分,其中至少两个柔性部分各自在参考部分和相应的一个锚固件之间延伸。 在示例性装置中,至少两个柔性部分中的至少两个包括各自的应力释放元件。 应力消除元件使得浮动元件由于应力梯度而偏转。 应力消除元件设置在相应的锚固件和参考部分之间的预定位置处,其中预定位置被选择为使得参考部分在装置的至少一个预定状态中基本上位于预定参考平面内。
    • 5. 发明申请
    • Acoustic resonator
    • 声谐振器
    • US20050146401A1
    • 2005-07-07
    • US11024165
    • 2004-12-27
    • Hendrikus TilmansWanling Pan
    • Hendrikus TilmansWanling Pan
    • H03H9/02H03H9/17H03H9/54
    • H03H9/172H03H9/02102H03H2009/02196
    • A tuneable film bulk acoustic resonator (FBAR) device. The FBAR device includes a bottom electrode, a top electrode and a piezoelectric layer in between the bottom electrode and the top electrode. The piezoelectric layer has a first overlap with the bottom electrode, where the first overlap is defined by a projection of the piezoelectric layer onto the bottom electrode in a direction substantially perpendicular to a plane of the bottom electrode. The FBAR device also includes a first dielectric layer in between the piezoelectric layer and the bottom electrode and a mechanism for reversibly varying an internal impedance of the device, so as to tune a resonant frequency of the FBAR device.
    • 可调薄膜体声共振器(FBAR)装置。 FBAR器件包括在底部电极和顶部电极之间的底部电极,顶部电极和压电层。 压电层具有与底部电极的第一重叠,其中第一重叠由基本上垂直于底部电极的平面的方向将压电层投影到底部电极上限定。 FBAR器件还包括在压电层和底部电极之间的第一介电层和用于可逆地改变器件的内部阻抗的机构,以调谐FBAR器件的谐振频率。
    • 9. 发明申请
    • Temperature Compensation Device and Method for MEMS Resonator
    • MEMS谐振器温度补偿装置及方法
    • US20110175492A1
    • 2011-07-21
    • US13009638
    • 2011-01-19
    • Steve StoffelsHendrikus Tilmans
    • Steve StoffelsHendrikus Tilmans
    • H03H9/08
    • H03H9/02448
    • The present disclosure provides a device including a MEMS resonating element, provided for resonating at a predetermined resonance frequency, the MEMS resonating element having at least one temperature dependent characteristic, a heating circuit arranged for heating the MEMS resonating element to an offset temperature (Toffset), a sensing circuit associated with the MEMS resonating element and provided for sensing its temperature dependent characteristic, and a control circuit connected to the sensing circuit for receiving measurement signals indicative of the sensed temperature dependent characteristic and connected to the heating circuit for supplying a control signal thereto to maintain the temperature of the MEMS resonating element at the offset temperature. The heating circuit includes a tunable thermal radiation source and the MEMS resonating element is provided so as to absorb at least a portion of the thermal radiation generated by the tunable thermal radiation source.
    • 本公开提供了一种包括MEMS谐振元件的器件,其被提供用于以预定谐振频率谐振,具有至少一个温度依赖特性的MEMS谐振元件,被布置为将MEMS谐振元件加热到偏移温度(Toffset)的加热电路, 与MEMS谐振元件相关联并用于感测其与温度相关的特性的感测电路,以及连接到感测电路的控制电路,用于接收指示感测到的温度依赖特性并连接到加热电路的测量信号,以供应控制信号 以将MEMS谐振元件的温度保持在偏移温度。 加热电路包括可调谐热辐射源,并且提供MEMS谐振元件以便吸收由可调热辐射源产生的热辐射的至少一部分。