The main function of bode100 loop analyzer is to measure the characteristics of the object to be measured in the frequency domain, understand its performance and stability, and assist in the design of control circuit. Its working principle is to input a scanning signal with frequency change and measure the influence at a specific point […]
Articles Tagged: amplifier
Basic concept of RF power amplifier (RF PA), circuit composition and linearization technology of RF PA
Basic concepts Radio frequency power amplifier (RF PA) is the main part of transmission system, and its importance is self-evident. In the transmitter’s forward circuit, the RF signal generated by the modulation oscillating circuit is very small. After a series of amplification (buffer stage, intermediate amplification stage, and last stage power amplification stage), enough RF […]
The new version of classic instrument amplifier (pgia) provides higher design flexibility
Author: Hooman Hashemi, product application engineer, ADI company brief introduction When connected to the sensor, the instrument amplifier (IA) is powerful and versatile, but there are some limitations that will hinder the design of variable gain IA or programmable gain instrument amplifier (pgia). In some literatures, the latter is also called software programmable gain amplifier […]
Differential optical isolation driver for testing instrument amplifier
It is said that some of the electrical signals we use “float” relative to the ground. A typical example may be the voltage drop on the shunt resistance in the power supply or complex biomedical signals, such as ECG. In this case, the instrument amplifier (IA) is used to amplify the differential mode component of […]
Characteristics and application range of afg-303x / afg-302x arbitrary waveform generator
Afg-303x / afg-302x series are 20MHz / 30MHz single isolated channel and double isolated channel arbitrary waveform signal generators, which are suitable for the fields of industry, scientific research and education. In the design of isolated output, the grounding of all output channels is isolated from the earth, which is suitable for the test application […]
Application design of new buffer based on variable voltage control current source and comparator
Authors: Seyyed Hossein pishgar1, alihossein sepahvand1, Omid hashemipour2 This paper introduces a new buffer based on comparator using variable voltage controlled current source (vvccs). The application of traceable current source provides high-precision performance, which can not only reduce the overshoot error of output node, but also reduce the change of overshoot error relative to output […]
Design and application of active bias control
In order to make a high-frequency amplifier, the bipolar transistor used in the common emitter configuration is sometimes defined by its small signal characteristics assuming that the collector emitter voltage (VCE) and collector current (IC) of the gain transistor are specific values. Therefore, it is necessary to produce these two conditions at the same time […]
What is negative feedback and what is its role in circuit applications
About 86 years ago, Harold black proposed this milestone concept when trying to reduce amplifier distortion. At that time, he wanted to realize a circuit that accepts the input VI and generates the output VO, which is expressed as: Aideal is the desired circuit gain (not necessarily large, just meet the application needs). In the […]
Method and solution of improving voltage swing rate of voltage feedback amplifier
From the perspective of dc accuracy, the development process of high-speed amplifier has been to improve accuracy and slew rate – which is related to large signal bandwidth (lsbw). Current feedback amplifier (CFA) has high slew rate, but relatively poor dc accuracy. The voltage swing rate of voltage feedback amplifier (VFA) has also been improved […]
Based on multiple high-class associations Σ-Δ Application scheme design of modulator
With the deepening of digital electronic system, people have higher and higher requirements for music signal playback. Therefore, class D amplifier with low distortion and high efficiency has become a research hotspot. However, at present, most class D amplifiers use analog pulse width modulation. If you want to amplify the digital signal, you also need […]