It does so by measuring the signal without drawing current, using "high impedance" sensors.
它使用“高阻抗”传感器来测量信号，而不是制图电流。
Contour modulation is a technique in which a phase-modulated signal waveform and amplifier output impedance work together to maintain higher efficiency over a sizable output power back-off.
轮廓调制结合了一种相位调制信号的波形和放大器的输出阻抗，可在某个较大型输出电源关闭后保持更高的效率。
The actual signal distortion levels depend upon input and output signal amplitude, as well as the output load impedance.
实际的信号失真水平取决于输入和输出信号的幅度，以及输出负载阻抗。
Gold-plated: improve conductive contact impedance improve signal transmission.
镀金：改善导电接触阻抗，增进信号传输。
Electrostatic shielding is provided by surrounding the signal path with a conductor connected to a low impedance point in the circuit, preferably the lo input terminal of the measuring device.
利用连接到电路中一个低阻点的导体，将信号通路包裹起来，即实现了静电屏蔽，该低阻点最好是测量设备的LO输入端子。
A preprocessing circuit is designed for analog signal transformation because of large inner impedance of biosensor and bipolar signal.
针对采用的生物传感器内阻高、信号弱、双极性等特点，用预处理电路对模拟信号进行了变换。
The main reasons of the breakdowns are the changes of load impedance and disturbance signal.
认为负载阻抗的变化和干扰信号是造成故障的主要原因。
This paper has presented a new method of measuring ground impedance by generating impulse current signal .
本文提出了利用发出冲击电流信号测量接地阻抗的新方法。
A model of contact impedance is introduced and its influence on high speed signal transmission is analyzed.
提出射频同轴插接器的高频接触阻抗模型，研究它对高速信号传输的影响。
Signal integrity theory is gaining increasing attention in high speed digital circuit design impedance matching plays an important role.
信号完整性理论在高速数字电路设计中日益被重视，阻抗匹配在信号完整性理论中占有重要地位。
A method that impedance compensation by CTAB ensured signal integrality in the high-speed digital design was introduced.
主要介绍高速数字设计中利用CTAB进行阻抗补偿保证系统信号完整性的方法。
The high impedance devices and signal sources must also be shielded.
高阻设备和信号源也必须是屏蔽的。
In former research the effects of electric contact on signal transmission have relations with a lot of factors, such as contact impedance and the frequency of transmission signal.
以前的研究表明，接触故障对信号传输的影响与很多因素有关，如接触阻抗和信号传输频率。
RESP signal detecting circuit using impedance method is introduced.
介绍一种用阻抗法检测呼吸信号的硬件电路。
Results: the results showed that the measuring electrode, skin-electrode, contacting impedance, and stimulating frequency all influenced the measured signal.
结果：电极阵列、电极皮肤接触阻抗、激励频率均对检测信号有影响。
Signal channel consists of attenuating circuit, impedance transformation circuit and amplification circuit.
信号通道由衰减电路、阻抗变换电路、放大电路等电路组成。
The problem of impedance matching must be considered in order to transmit the signal of generator to the load efficiently and distortionless by transmission lines.
为了使传输线能够将信号源的信号高效不失真地传送到负载，需要考虑阻抗匹配问题。
The mechanism in forming reflection was studied; that is, the change in the instantaneous impedance caused signal reflection.
研究了反射形成的机理，即阻抗突变引发信号反射，通过分析给出了减少反射的措施。
Switching boost converter's load effect has great effect on input phase, stability of small signal, ratio of input and output impedance, and the ratio of Boost converter's output efficiency.
开关变换器的负载效应对变换器升压比、输出效率、输入相位差、小信号稳定度、输入与输出阻抗之比等有着非常重要的影响。
Instrumental amplifiers with high input impedance, high CMRR and low drift are widely used in the small signal amplifying field.
仪表放大器电路以其高输入阻抗、高共模抑制比、低漂移等特点在传感器输出的小信号放大领域得到了广泛的应用。
With the use of double balance mixer structure, we achieved wideband impedance match at RF port and selected appropriate switch signal at LO port.
采用双平衡混频结构进行设计，在射频端口实现宽带阻抗匹配，在本振端口选取合适的开关信号。
Still further, a controller may be coupled to receive a control signalcorresponding to a variable impedance level, and control a local oscillator coupled to the mixer responsive to the control signal.
更进一步，控制器可以被耦合以接收对应于可变阻抗位准的控制信号，并响应于所述控制信 号来控制耦合到混频器的本机振荡器。
A new signal source for electric impedance tomography system is developed to improve the high-frequency performance and to reduce the noise level of the old one.
目的研制用于电阻抗断层成像系统的信号源，提高现有系统的高频特性，同时降低其噪声水平。
In geophysics, reflection refers to the seismic energy or signal that returns from an interface of contrasting acoustic impedance, known as a reflector, according to Snell's law.
在地球物理中，反射指的是地震能量或信号在反射面（具有不同声阻抗的地层分界面）处按照斯奈尔定律发生的回转。
PC-based system with video and signal acquisition boards is constructed to estimate coronary artery impedance.
利用PC机和图像、信号采集设备，建立冠状动脉血管阻抗的估计系统。
When impedance are mismatched, the transmitted signal is not completely absorbed by the load and a portion is reflected back into the transmission line.
若阻抗失配，发送信号会不完全地为负载所吸收的同时又部分地反射回到传输线。
Also, shielded cabling, such as coax or triax, should be used to make connections from the high impedance devices or signal sources to the switch card.
此外，应该使用屏蔽电缆，例如同轴或同轴三芯，连接高阻装置或信号源和开关卡。
Also, shielded cabling, such as coax or triax, should be used to make connections from the high impedance devices or signal sources to the switch card.
此外，应该使用屏蔽电缆，例如同轴或同轴三芯，连接高阻装置或信号源和开关卡。
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