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    • 5. 发明授权
    • Low energy consumption RF telemetry control for an implantable medical device
    • 用于可植入医疗设备的低能耗RF遥测控制
    • US06456887B1
    • 2002-09-24
    • US09736625
    • 2000-12-14
    • Charles H. DuddingGregory J. Haubrich
    • Charles H. DuddingGregory J. Haubrich
    • G08C1702
    • A61N1/37276A61N1/37252A61N1/3727
    • In an implantable medical device, a frequency synthesizer employed in the RF transceiver of the IMD operating system functions in a PLL LOCK mode wherein the VCO frequency is governed by the PLL and an energy saving HOLD mode wherein the PLL is not operational and the VCO generated carrier frequency can drift over time. The PLL circuit is powered up and coupled with a control voltage input and the output of the VCO to develop a frequency control voltage stored by a capacitive loop filter during initial LOCK portions of both uplink and downlink telemetry transmission time periods. A frequency modulation (FM) input of the VCO receives data bit modulation voltages that modulates the carrier frequency during uplink transmission of patient data. During the HOLD portion of a downlink telemetry transmission, an AFC algorithm is enabled and derives a frequency correction value from the difference in frequency of the constant received carrier frequency and the drifting VCO generated carrier frequency, and the frequency correction value is applied to the VCO FM input to compensate for loop filter capacitor discharge of the control voltage causing the drift. The AFC algorithm derived frequency correction value is stored in memory and is also applied during the HOLD portion of an uplink telemetry transmission to the VCO FM input to compensate for loop filter capacitor discharge of the control voltage causing the drift. In addition, a recharge current is applied to the capacitive loop filter.
    • 在可植入医疗设备中,在IMD操作系统的RF收发器中使用的频率合成器以PLL锁定模式工作,其中VCO频率由PLL控制,并且节能HOLD模式,其中PLL不工作,并且VCO产生 载波频率随时间漂移。 PLL电路上电并与控制电压输入和VCO的输出耦合,以在上行链路和下行链路传输时间段的初始LOCK部分期间开发由电容性环路滤波器存储的频率控制电压。 VCO的频率调制(FM)输入接收在患者数据的上行链路传输期间调制载波频率的数据比特调制电压。 在下行链路遥测传输的HOLD部分期间,启用AFC算法,并且根据恒定接收载波频率和漂移VCO产生的载波频率的差异导出频率校正值,并且将频率校正值应用于VCO FM输入补偿环路滤波电容放电的控制电压导致漂移。 AFC算法导出的频率校正值存储在存储器中,并且在上行链路遥测传输的HOLD部分期间也施加到VCO FM输入端,以补偿导致漂移的控制电压的环路滤波电容放电。 此外,充电电流被施加到电容性环路滤波器。
    • 7. 发明申请
    • Variable Implantable Medical Device Power Characteristics Based Upon Data or Device Type
    • 基于数据或设备类型的可变植入式医疗设备功率特性
    • US20080027501A1
    • 2008-01-31
    • US11460774
    • 2006-07-28
    • Gregory J. HaubrichJavaid MasoudCharles H. Dudding
    • Gregory J. HaubrichJavaid MasoudCharles H. Dudding
    • A61N1/36
    • A61N1/37276
    • An implantable medical device (“IMD”) as described herein includes adjustable power characteristics such as variable transmitter output power and variable receiver front end gain. These power characteristics can be adjusted in a dynamic manner based upon various operating aspects of the intended or actual IMD telemetry environment. These operating aspects may include the external telemetry device type, the IMD device type, and/or the type, context, or meaning of the telemetry data transmitted by the IMD. The IMD may process information related to these operating aspects to generate power scaling instructions or control signals that are interpreted by the IMD transmitter and/or the IMD receiver. Such adjustability enables the IMD to satisfy minimum telemetry requirements in a manner that does not waste power, thus extending the IMD battery life.
    • 如本文所述的可植入医疗装置(“IMD”)包括诸如可变发射器输出功率和可变接收器前端增益的可调功率特性。 这些功率特性可以基于预期或实际IMD遥测环境的各种操作方面以动态方式进行调整。 这些操作方面可以包括由IMD发送的遥测数据的外部遥测设备类型,IMD设备类型和/或类型,上下文或意义。 IMD可以处理与这些操作方面相关的信息以产生由IMD发射机和/或IMD接收机解释的功率缩放指令或控制信号。 这种可调性使IMD能够以不浪费电力的方式满足最小遥测要求,从而延长了IMD的电池寿命。
    • 8. 发明授权
    • Variable implantable medical device power characteristics based upon data or device type
    • 基于数据或设备类型的可变植入式医疗设备功率特性
    • US08838251B2
    • 2014-09-16
    • US11460774
    • 2006-07-28
    • Gregory J. HaubrichJavaid MasoudCharles H. Dudding
    • Gregory J. HaubrichJavaid MasoudCharles H. Dudding
    • A61N1/08A61N1/372
    • A61N1/37276
    • An implantable medical device (“IMD”) as described herein includes adjustable power characteristics such as variable transmitter output power and variable receiver front end gain. These power characteristics can be adjusted in a dynamic manner based upon various operating aspects of the intended or actual IMD telemetry environment. These operating aspects may include the external telemetry device type, the IMD device type, and/or the type, context, or meaning of the telemetry data transmitted by the IMD. The IMD may process information related to these operating aspects to generate power scaling instructions or control signals that are interpreted by the IMD transmitter and/or the IMD receiver. Such adjustability enables the IMD to satisfy minimum telemetry requirements in a manner that does not waste power, thus extending the IMD battery life.
    • 如本文所述的可植入医疗装置(“IMD”)包括诸如可变发射器输出功率和可变接收器前端增益的可调功率特性。 这些功率特性可以基于预期或实际IMD遥测环境的各种操作方面以动态方式进行调整。 这些操作方面可以包括由IMD发送的遥测数据的外部遥测设备类型,IMD设备类型和/或类型,上下文或意义。 IMD可以处理与这些操作方面相关的信息以产生由IMD发射机和/或IMD接收机解释的功率缩放指令或控制信号。 这种可调性使IMD能够以不浪费电力的方式满足最小遥测要求,从而延长了IMD的电池寿命。