Using electrometer to measure low level and high precision

Accurate measurement of high range resistance Many test applications require the measurement of resistivity (area resistivity and volume resistivity) of high-level materials. The traditional measurement method is to apply a high enough voltage to the sample, measure the current flowing through the sample, and then use Ohm’s Law (r = V / I) to calculate […]

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Internal noise source of OP AMP and its optimization solution

Daniel Defoe and Benjamin Franklin once said that there are only two things in life that are certain: death and taxes; unfortunately, for people who deal with electronic products, there is another one: noise. Although electrical noise is inevitable, designers can better understand each noise source and their impact on the noise level of the […]

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Characteristics and application analysis of Tektronix pa1000 single phase power analyzer

Tektronix pa1000 is a single-phase, single channel power analysis solution optimized for fast, efficient and accurate power analysis in accordance with international standards. With its compact appearance, user interface similar to DMM, graphic display and powerful software, users can quickly visualize, analyze and record the power consumption efficiency of the next generation equipment, including standby […]

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Analysis of application problems and solutions of current feedback amplifier

Most current feedback (CFB) amplifiers belong to the category of high-speed amplifiers. In recent years, a large number of good application guides are mainly used to introduce the application of current feedback amplifier and the main problems encountered. Here we will summarize with a short text. The CFB amplifier has a high impedance input (non […]

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Characteristics and application of small resistance test scheme of Seth instrument

System background Resistance test is the most commonly used test method to characterize the characteristics of materials. In some applications, users need to carry out ultra low resistance test, such as nano materials, superconducting materials, relay switches, low resistance materials, connector test, or precise heat measurement and research fields. These tested devices usually have very […]

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Common problems and solutions in op amp circuit design

As an electronic engineer, operational amplifier is a very common IC. If we talk about addition circuit, subtraction circuit, multiplication circuit and exponential circuit today, I’m sorry. So, let’s talk about some details of the design today. First, how to compensate the bias current The typical circuits of inverting operational amplifiers are as follows In […]

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