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    • 2. 发明申请
    • RE-CONFIGURABLE IMPEDANCE MATCHING AND HARMONIC FILTER SYSTEM
    • 可配置阻抗匹配和谐波滤波系统
    • WO2008014029A2
    • 2008-01-31
    • PCT/US2007/067257
    • 2007-04-24
    • FREESCALE SEMICONDUCTOR INC.LIU, LianjunMILLER, Melvy F.
    • LIU, LianjunMILLER, Melvy F.
    • H04B1/04H01Q11/12
    • H04B1/0458H04B1/0067
    • Methods and apparatus are provided to enable a transceiver (200) or transmitter including a single PA line-up (210) to transmit signals having frequencies in two or more different frequency bands, and/or having two or more different modulation types, and/or having two or more different RF power levels. The single PA line-up includes at least one variable matching circuit (216) and a variable harmonic filter (240) to tune match and tune filter communication signals prior to transmission. The variable matching circuit and the variable harmonic filter each include at least one variable capacitive element (2160 and 2400) that switches ON/OFF depending on whether a low frequency signal or a high frequency signal is being transmitted. Each variable capacitive element includes separate direct current and radio frequency terminals to enable the single PA line-up to change signal modulation and/or RF power levels in addition to frequencies.
    • 提供了方法和装置,以使包括单个PA阵列(210)的收发机(200)或发射机能够发送具有两个或多个不同频带中的频率和/或具有两个或多个不同调制类型的频率,和/ 或具有两个或更多个不同的RF功率电平。 单个PA阵列包括至少一个可变匹配电路(216)和可变谐波滤波器(240),以在传输之前调谐匹配和调谐滤波器通信信号。 可变匹配电路和可变谐波滤波器各自包括至少一个可变电容元件(2160和2400),其根据是否正在发送低频信号或高频信号来接通/断开。 每个可变电容元件包括单独的直流电和射频终端,以使得单个PA阵列除频率之外还能改变信号调制和/或RF功率电平。
    • 3. 发明申请
    • INTEGRATED CIRCUIT HAVING RE-CONFIGURABLE BALUN CIRCUIT AND METHOD THEREFOR
    • 具有可重新配置的BALUN电路的集成电路及其方法
    • WO2008140903A1
    • 2008-11-20
    • PCT/US2008/061126
    • 2008-04-22
    • FREESCALE SEMICONDUCTOR INC.LIU, Lianjun
    • LIU, Lianjun
    • H03H11/32
    • H03H7/42H03H7/0153H03H7/1775
    • A balun circuit (10) comprises a balun transformer (12) having first and second windings (13, 15), and first and second variable capacitors (18, 20). The first variable capacitor (18) has a first plate electrode coupled to the first terminal of the first winding (13), and a second plate electrode coupled to the second terminal of the first winding (13). The second variable capacitor (20) has a first plate electrode coupled to the first terminal of the second winding (15), and a second plate electrode coupled to the second terminal of the second winding (15). The first variable capacitor (18) is tunable between first and second capacitance values. The second variable capacitor (20) is tunable between third and fourth capacitance values. Tuning the variable capacitors (18, 20) allows the balun circuit (10) to be re-configurable to operate in both the first frequency band and the second frequency band.
    • 平衡 - 不平衡变换器电路(10)包括具有第一和第二绕组(13,15)以及第一和第二可变电容器(18,20)的平衡 - 不平衡变压器(12)。 第一可变电容器(18)具有耦合到第一绕组(13)的第一端子的第一板电极和耦合到第一绕组(13)的第二端子的第二板电极。 第二可变电容器(20)具有耦合到第二绕组(15)的第一端子的第一板电极和耦合到第二绕组(15)的第二端子的第二板电极。 第一可变电容器(18)可在第一和第二电容值之间调节。 第二可变电容器(20)可在第三和第四电容值之间调节。 调谐可变电容器(18,20)允许平衡 - 不平衡转换电路(10)可重新配置为在第一频带和第二频带两者中工作。
    • 4. 发明申请
    • ELECTROMECHANICAL TRANSDUCER DEVICE AND METHOD OF FORMING A ELECTROMECHANICAL TRANSDUCER DEVICE
    • 机电传感器装置及形成机电传感器装置的方法
    • WO2010061364A2
    • 2010-06-03
    • PCT/IB2009/056020
    • 2009-11-25
    • FREESCALE SEMICONDUCTOR, INC.COMMISSARIAT à L'ENERGIE ATOMIQUE (CEA)PERRUCHOT, FrançoisDEFAY, EmmanuelREY, PatriceLIU, LianjunPACHECO, Sergio
    • PERRUCHOT, FrançoisDEFAY, EmmanuelREY, PatriceLIU, LianjunPACHECO, Sergio
    • B81B3/00H01L41/09
    • B81B3/0072B81B2201/032H01L41/0933H01L41/094
    • A micro or nano electromechanical transducer device (200) formed on a semiconductor substrate (210) comprises a movable structure (203) which is arranged to be movable in response to actuation of an actuating structure. The movable structure (203) comprises a mechanical structure (204) comprising at least one mechanical layer (204) having a first thermal response characteristic and a first mechanical stress response characteristic, at least one layer (202) of the actuating structure, the at least one layer having a second thermal response characteristic different to the first thermal response characteristic and a second mechanical stress response characteristic different to the first mechanical stress response characteristic, a first compensation layer (206) having a third thermal response characteristic and a third mechanical stress characteristic, and a second compensation layer (207) having a fourth thermal response characteristic and a fourth mechanical stress response characteristic. The first (206) and second (207) compensation layers are arranged to compensate a thermal effect produced by the different first and second thermal response characteristics of the mechanical structure and the at least one layer (202) of the actuating structure such that movement of the movable structure (203) is substantially independent of variations in temperature and to adjust a stress effect produced by the different first and second stress response characteristics of the mechanical structure and the at least one layer (202) of the actuating structure such that the movable structure is deflected a predetermined amount relative to the substrate when the electromechanical transducer device (200) is in an inactive state.
    • 形成在半导体衬底(210)上的微型或纳米机电换能器装置(200)包括可移动结构(203),其被布置成响应于致动结构的致动而是可移动的。 可移动结构(203)包括机械结构(204),其包括具有第一热响应特性和第一机械应力响应特性的至少一个机械层(204),所述致动结构的至少一个层(202) 具有与第一热响应特性不同的第二热响应特性和与第一机械应力响应特性不同的第二机械应力响应特性的至少一个层,具有第三热响应特性和第三机械应力的第一补偿层(206) 以及具有第四热响应特性和第四机械应力响应特性的第二补偿层(207)。 第一(206)和第二(207)补偿层布置成补偿由机械结构和致动结构的至少一个层(202)的不同的第一和第二热响应特性产生的热效应, 可移动结构(203)基本上独立于温度变化并且调节由机械结构和致动结构的至少一个层(202)的不同的第一和第二应力响应特性产生的应力效应,使得可移动的结构 当机电换能器装置(200)处于非活动状态时,结构相对于基板偏转预定量。