common-mode rejection ratio

简明释义

共模抑制比

英英释义

例句

1.The common-mode rejection ratio 共模抑制比 of this circuit is measured to ensure it meets industry standards.

该电路的共模抑制比 common-mode rejection ratio 被测量以确保其符合行业标准。

2.When designing sensors, engineers often prioritize the common-mode rejection ratio 共模抑制比 to enhance sensitivity.

在设计传感器时，工程师通常优先考虑共模抑制比 common-mode rejection ratio 以提高灵敏度。

3.In differential signal processing, a high common-mode rejection ratio 共模抑制比 ensures better performance.

在差分信号处理过程中，高共模抑制比 common-mode rejection ratio 确保更好的性能。

4.A low common-mode rejection ratio 共模抑制比 can lead to distorted signals in communication systems.

低共模抑制比 common-mode rejection ratio 可能导致通信系统中的信号失真。

5.The amplifier's common-mode rejection ratio 共模抑制比 is critical for minimizing noise in audio applications.

放大器的共模抑制比 common-mode rejection ratio 对于减少音频应用中的噪声至关重要。

作文

In the field of electronics and signal processing, the term common-mode rejection ratio refers to a critical parameter that determines how well a device can reject common-mode signals. These are signals that appear simultaneously and in-phase on both inputs of a differential amplifier. For instance, when two sensors measure the same environmental condition, any noise or interference that affects both sensors equally is considered a common-mode signal. The ability of the amplifier to ignore this noise while amplifying the actual signal of interest is quantified by the common-mode rejection ratio (CMRR). A high CMRR indicates that the device effectively eliminates unwanted noise, ensuring that the output closely represents the true input signal. Understanding the significance of common-mode rejection ratio is essential for engineers and technicians who design and implement electronic circuits. In many applications, especially in communication systems and instrumentation, accurate signal representation is paramount. If a device has a low CMRR, it may produce outputs that are distorted by noise, leading to incorrect readings or data transmission errors. Therefore, selecting components with high CMRR values is crucial when designing circuits that require precision and reliability. The common-mode rejection ratio is usually expressed in decibels (dB), and it is calculated as the ratio of the differential gain to the common-mode gain. Mathematically, it can be represented as CMRR = 20 log10(Ad / Ac), where Ad is the differential gain and Ac is the common-mode gain. This formula highlights that even small differences in gain can significantly impact the overall performance of the system. In practical terms, a CMRR of 60 dB means that the differential signal is amplified much more than the common-mode signal, which is desirable in most applications. In real-world scenarios, achieving a high common-mode rejection ratio can be challenging due to various factors such as component tolerances, temperature variations, and circuit layout. Engineers often employ techniques such as careful circuit design, shielding, and filtering to improve CMRR. For example, twisted pair cables are commonly used in communication systems to minimize electromagnetic interference, thereby enhancing the CMRR of the system. Moreover, the importance of common-mode rejection ratio extends beyond just amplifiers. It plays a vital role in the performance of operational amplifiers, analog-to-digital converters, and other signal processing devices. As technology advances, the demand for higher performance and more accurate measurements continues to grow, making the understanding of CMRR increasingly relevant. In conclusion, the common-mode rejection ratio is a fundamental concept in electronics that underscores the importance of noise rejection in signal processing. By ensuring that devices have a high CMRR, engineers can create systems that deliver reliable and accurate results, which is essential in a wide range of applications from medical instrumentation to telecommunications. As we continue to innovate and develop new technologies, the principles surrounding CMRR will remain integral to the advancement of electronic systems and their applications in our daily lives.

在电子和信号处理领域，术语共模抑制比指的是一个关键参数，它决定了设备在多大程度上能够抑制共模信号。共模信号是指同时出现在差分放大器两个输入端并且相位相同的信号。例如，当两个传感器测量相同的环境条件时，任何对两个传感器均有影响的噪声或干扰都被视为共模信号。放大器忽略这些噪声，同时放大实际感兴趣信号的能力通过共模抑制比（CMRR）来量化。高CMRR意味着设备有效消除不必要的噪声，确保输出与真实输入信号密切相关。理解共模抑制比的重要性对于设计和实施电子电路的工程师和技术人员至关重要。在许多应用中，特别是在通信系统和仪器中，准确的信号表示是至关重要的。如果设备的CMRR较低，它可能会产生受到噪声扭曲的输出，导致读取错误或数据传输错误。因此，在设计需要精确性和可靠性的电路时，选择具有高CMRR值的组件至关重要。共模抑制比通常以分贝（dB）表示，并计算为差分增益与共模增益的比率。从数学上讲，它可以表示为CMRR = 20 log10(Ad / Ac)，其中Ad是差分增益，Ac是共模增益。这个公式突显了增益的小差异如何显著影响系统的整体性能。在实际应用中，CMRR为60 dB意味着差分信号的放大远大于共模信号，这是大多数应用所期望的。在现实场景中，由于各种因素，例如组件公差、温度变化和电路布局，实现高共模抑制比可能具有挑战性。工程师通常采用仔细的电路设计、屏蔽和过滤等技术来改善CMRR。例如，扭绞对电缆通常用于通信系统，以最小化电磁干扰，从而增强系统的CMRR。此外，共模抑制比的重要性不仅限于放大器。它在运算放大器、模数转换器和其他信号处理设备的性能中也发挥着至关重要的作用。随着技术的进步，对更高性能和更准确测量的需求不断增长，使得对CMRR的理解变得越来越相关。总之，共模抑制比是电子学中的一个基本概念，强调了在信号处理中的噪声抑制的重要性。通过确保设备具有高CMRR，工程师可以创建提供可靠和准确结果的系统，这在从医疗仪器到电信的广泛应用中都是至关重要的。随着我们继续创新和开发新技术，围绕CMRR的原则将继续对电子系统及其在我们日常生活中的应用的进步起到不可或缺的作用。