Power supply solution of Helmholtz coil

Zlgpsa series programmable AC power supply is a new power supply solution for Helmholtz coil, which continues the advantages of traditional [signal generator + amplifier] combined power supply, and has the advantages of more convenient operation experience, smaller footprint and lower cost. Helmholtz coil is composed of a pair of identical circular conductor coils, which […]

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Application of PWM technology in class D power amplifier

1. Introduction Audio power amplifier can be divided into four categories Class A、Class B、Class AB、Class D. Class A is a complete linear amplifier. Using a single transistor amplification, the heating is large, the efficiency is low, but the distortion rate is very low. Class B, also known as linear amplifier, uses two transistors to linearly […]

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Frequency characteristic measurement based on amp328 audio amplifier

Measuring the frequency characteristics (including amplitude frequency characteristics and phase frequency characteristics) of circuit systems, such as amplifiers, is an important part of circuit measurement. There are several ways to measure the frequency characteristics of a circuit Frequency sweep method White noise injection method Unit impulse response of measurement system In this paper, we use […]

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What are the design methods of WiFi RF circuit

This article is written by me combined with many years of work experience and practice, which has a certain practicality. I hope it can help you in your design work. 1. Preface This is a highly targeted technical article. In this article, I just analyzed the general RF circuit design of Wi Fi products, and […]

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