common mode rejection

简明释义

共横抑制

英英释义

例句

1.Engineers often test the common mode rejection 共模抑制 performance of sensors in noisy environments.

工程师们经常在嘈杂环境中测试传感器的共模抑制 共模抑制性能。

2.To achieve better performance, the circuit design must consider the common mode rejection 共模抑制 characteristics.

为了获得更好的性能，电路设计必须考虑共模抑制 共模抑制特性。

3.A device with poor common mode rejection 共模抑制 may pick up unwanted interference from nearby electrical equipment.

具有较差共模抑制 共模抑制的设备可能会从附近的电气设备中捕捉到不必要的干扰。

4.In differential amplifiers, a high common mode rejection 共模抑制 helps to ensure accurate signal processing.

在差分放大器中，高共模抑制 共模抑制有助于确保信号处理的准确性。

5.The amplifier's common mode rejection 共模抑制 ratio is crucial for minimizing noise in audio signals.

放大器的共模抑制 共模抑制比率对于减少音频信号中的噪声至关重要。

作文

In the field of electronics and signal processing, the concept of common mode rejection plays a crucial role in ensuring the accuracy and reliability of measurements. This term refers to the ability of a device, particularly amplifiers, to reject or eliminate signals that are common to both the input terminals while amplifying the difference between them. In simpler terms, it allows a system to focus on the desired signal while ignoring noise or interference that may be present in both channels. For example, consider a scenario where an engineer is working with a differential amplifier to measure a small voltage signal from a sensor. If the sensor is located in an environment with a lot of electrical noise, such as near heavy machinery, the noise can couple into the signal lines, affecting the measurement. Here, the common mode rejection becomes vital. A high common mode rejection ratio (CMRR) indicates that the amplifier can effectively ignore the noise while accurately amplifying the signal from the sensor.The importance of common mode rejection is not limited to just amplifiers; it extends to various applications in telecommunications, audio equipment, and instrumentation. For instance, in audio systems, when two microphones are used to capture sound, they might pick up similar background noise. A system with good common mode rejection will ensure that the actual audio signal is clear and free from unwanted noise, thus enhancing the listening experience.To understand common mode rejection better, one must also consider its mathematical representation. The common mode rejection ratio is defined as the ratio of the differential gain (the amplification of the difference between the inputs) to the common mode gain (the amplification of the signals that are common to both inputs). Mathematically, it can be expressed as:CMRR = 20 log10 (Ad / Ac)Where Ad is the differential gain and Ac is the common mode gain. A higher CMRR value indicates better performance in rejecting common mode signals.Moreover, the design of circuits to achieve high common mode rejection is essential for many applications. Engineers often employ techniques such as balanced inputs, twisted pair wiring, and proper grounding to enhance the common mode rejection capability of their designs. These methods help minimize the effects of external interference and improve the overall performance of the system.In conclusion, understanding the concept of common mode rejection is fundamental for anyone involved in electronics and signal processing. It not only helps in improving the quality of measurements and signals but also ensures that systems operate efficiently in noisy environments. As technology continues to advance, the significance of common mode rejection will only grow, making it an essential topic for engineers and technicians alike. By mastering this concept, professionals can design better systems that deliver accurate results, ultimately leading to improved performance across various fields.

在电子和信号处理领域，common mode rejection的概念在确保测量的准确性和可靠性方面发挥着至关重要的作用。这个术语指的是设备，特别是放大器，拒绝或消除输入端子之间共同存在的信号的能力，同时放大它们之间的差异。简单来说，它使系统能够专注于所需信号，同时忽略可能存在于两个通道中的噪声或干扰。例如，考虑一个工程师正在使用差分放大器测量来自传感器的小电压信号的场景。如果传感器位于电气噪声较大的环境中，例如靠近重型机械，噪声可能会耦合到信号线中，从而影响测量。在这里，common mode rejection就显得尤为重要。高的common mode rejection比率（CMRR）表明放大器可以有效地忽略噪声，同时准确放大来自传感器的信号。common mode rejection的重要性不仅限于放大器；它扩展到电信、音频设备和仪器等各种应用。例如，在音频系统中，当使用两个麦克风捕捉声音时，它们可能会拾取相似的背景噪声。具有良好common mode rejection的系统将确保实际音频信号清晰且不受不必要的噪声影响，从而增强听觉体验。为了更好地理解common mode rejection，还必须考虑其数学表示。common mode rejection比率定义为差分增益（输入之间差异的放大）与共模增益（对两个输入共同信号的放大）的比率。从数学上讲，可以表示为：CMRR = 20 log10 (Ad / Ac)其中Ad是差分增益，Ac是共模增益。更高的CMRR值表示更好的拒绝共模信号的性能。此外，为了实现高common mode rejection，电路设计是许多应用中的关键。工程师通常采用平衡输入、扭绞对线和适当接地等技术，以增强其设计的common mode rejection能力。这些方法有助于最小化外部干扰的影响，提高系统的整体性能。总之，理解common mode rejection的概念对于任何从事电子和信号处理的人来说都是基础。它不仅有助于提高测量和信号的质量，还确保系统在嘈杂环境中有效运行。随着技术的不断进步，common mode rejection的重要性只会增加，使其成为工程师和技术人员必学的主题。通过掌握这一概念，专业人士可以设计出更好的系统，提供准确的结果，最终在各个领域提高性能。