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    • 4. 发明授权
    • Systems and methods for providing neural stimulation transitions
    • 用于提供神经刺激过渡的系统和方法
    • US08249717B2
    • 2012-08-21
    • US11779764
    • 2007-07-18
    • Marina V. BrockwayPaul A. HaefnerAnthony V. CaparsoWondimeneh Tesfavesus
    • Marina V. BrockwayPaul A. HaefnerAnthony V. CaparsoWondimeneh Tesfavesus
    • A61N1/00
    • A61N1/36114A61N1/36117
    • A method embodiment comprises generating a neural stimulation signal for a neural stimulation therapy. The signal is generated during a duty cycle of a stimulation period to provide the neural stimulation therapy with an intensity at a therapy level for a portion of the duty cycle. In various embodiments, a ramp up protocol is implemented to begin the duty cycle, a ramp down protocol is implemented to end the duty cycle, or both the ramp up protocol and the ramp down protocol are implemented. The ramp up protocol includes ramping up the intensity from a non-zero first subthreshold level for the neural stimulation therapy at the beginning of the duty cycle to the therapy level. The ramp down protocol includes ramping down the intensity from the therapy intensity level to a non-zero second subthreshold level for the neural stimulation therapy at the end of the duty cycle.
    • 方法实施例包括产生用于神经刺激治疗的神经刺激信号。 在刺激期的占空比期间产生信号,以在占空比的一部分的治疗水平上提供具有强度的神经刺激治疗。 在各种实施例中,实现斜坡上升协议以开始占空比,实现斜降协议以结束占空比,或者实现升温协议和斜降协议两者。 加速协议包括在占空比开始时到神经刺激治疗的非零第一亚阈值水平上升到治疗水平。 斜坡协议包括在占空比结束时将神经刺激治疗的强度从治疗强度水平向下降至非零秒次阈值水平。
    • 5. 发明申请
    • Respiration Measurements and Dosimetry Control in Inhalation Testing Systems
    • 吸入测量系统中的呼吸测量和剂量控制
    • US20110218450A1
    • 2011-09-08
    • US12715503
    • 2010-03-02
    • Paul A. HaefnerLoell Boyce MoonSteve HachtmanScott R. TiesmaGary Pritchard
    • Paul A. HaefnerLoell Boyce MoonSteve HachtmanScott R. TiesmaGary Pritchard
    • A61B5/085
    • A61B5/091A61B5/085A61M31/00
    • Inhalation measurement systems and methods enable, during inhalant exposure, substantially real-time respiratory measurements of a test subject using techniques that obtain measurements of respiration directly from that test subject, instead of from inhalation chamber parameter measurements. Direct test subject respiratory measurements may be, by way of example only, impedance measurements. These respiratory measurements taken directly from the test subject may be transmitted, wirelessly for example, for processing during the course of the test to a processing system to determine a cumulative volume of inhalant inspired by the test subject. From that, a cumulative amount of inhalant (or dose) inspired by the test subject may be determined during the course of the inhalation compound test. In addition, a calibration procedure may be performed before the inhalant exposure to provide correlation needed to translate chest and/or abdominal wall expansion measurements, made during the test, into lung volume measurements.
    • 吸入测量系统和方法在吸入式暴露过程中可以使用直接从该测试对象而不是从吸入室参数测量获得呼吸测量值的技术,使测试对象基本上实时呼吸测量。 直接测试对象呼吸测量可能仅作为示例,阻抗测量。 直接从测试对象取得的这些呼吸测量可以以无线方式传送,例如用于在测试过程中进行处理以处理系统以确定由测试对象启发的吸入剂的累积体积。 由此可以在吸入化合物测试过程中确定受试者启发的吸入剂(或剂量)的累积量。 此外,可以在吸入剂暴露之前进行校准程序,以提供在测试期间将胸部和/或腹壁扩张测量值转换成肺容量测量所需的相关性。
    • 8. 发明授权
    • Linear amplifier
    • 线性放大器
    • US5699014A
    • 1997-12-16
    • US627403
    • 1996-04-04
    • Paul A. HaefnerWilliam J. Linder
    • Paul A. HaefnerWilliam J. Linder
    • H03F1/32H03F3/45
    • H03F1/3211H03F1/3205H03F2200/162H03F2200/372
    • A low-noise, low-power complementary metal-oxide-semiconductor (CMOS) integrated circuit common source differential amplifier is disclosed which is capable of amplifying low amplitude cardiac signals such as those produced by atrial depolarization of the heart. The amplifier has a pair of large area p-channel input field-effect transistors (FETs) biased in weak inversion. The amplifier also has active load FETs biased in the nonsaturation (linear) region by means of a varying gate terminal voltage applied by a dynamic bias circuit. The gate terminal voltage is varied to match the temperature dependence of the output conductance of the load FETs to the temperature dependence of the transconductance of the input FETs. The gate terminal voltage also sets a dc bias point which uses the nonlinearity in the load FET output conductance to cancel nonlinearity in the input FET transconductance.
    • 公开了一种低噪声,低功率互补金属氧化物半导体(CMOS)集成电路公共源差分放大器,其能够放大低振幅心脏信号,例如通过心脏去极化产生的心脏信号。 放大器具有一对在弱反相中偏置的大面积p沟道输入场效应晶体管(FET)。 放大器还通过由动态偏置电路施加的变化的栅极端子电压而在非饱和(线性)区域中偏置有有源负载FET。 栅极端子电压变化以匹配负载FET的输出电导的温度依赖性与输入FET的跨导的温度依赖性。 栅极端子电压还设置直流偏置点,其使用负载FET输出电导中的非线性来消除输入FET跨导中的非线性。