Today, Topchip Electronic Component Procurement Network will introduce you! The working principle and main functions of power amplifiers.
1、 Working principle of power amplifier
The working principle of a power amplifier (referred to as a power amplifier) is to amplify various sound signals played by the sound source to drive the speaker to produce sound, commonly known as an "amplifier", which is the most basic equipment in a sound system. Its task is to amplify weak electrical signals from the signal source or mixing station to drive the speaker to produce sound. The power amplifier relies on voltage to control the size of the power channel, thus achieving the control of current size. It uses the current control function of a transistor or the voltage control function of a long-acting transistor to convert the power supply into a current that varies according to the input signal, because the sound is in different amplitude and frequency bands, which is the AC signal current.
The current of the transistor and the electrode is always beta times the electrode current, which is the AC amplification factor of the transistor. Applying this, if a small signal is injected into the base electrode, the current flowing through the electrode will be equal to beta times the electrode current. The power amplifier itself uses these functions to achieve small signal control over large signals, enabling multi-level amplifiers to achieve high-power output, rather than truly amplifying power.
2、 The main function of power amplifier
The main function of a power amplifier is to ensure the high restoration of audio signals. Here, we will give you a very simple example. In fact, a power amplifier is similar to a copier we usually use, and the actual function between the two is to replicate something. For example, a copier can copy smaller paper into larger paper. The same function applies to power amplifiers. The copied music is not the original source. After being processed by the power amplifier, the signal is a restored and enhanced version of the original audio, and the volume is slightly higher than the input of the original audio.
Power amplifiers are the largest family of various audio equipment, mainly used to amplify the weak signal input from the sound source equipment and generate enough current to drive the speaker for sound reproduction. Due to consideration of power, impedance, distortion, dynamics, and different usage ranges and control adjustment functions, different power amplifiers also have different internal signal processing, circuit design, and production processes.
We are the professional distributor of electronic components, providing a large variety of products to save you a lot of time, effort, and cost with our efficient self-customized service.
Why did you choose us
1. Efficient supply management: Covering 500 well-known component brand manufacturers worldwide, connecting over 2000 original factories, agents, and OEM inventory channels.
2. Delivery capability: With over 10 years of experience in serving end customers, we have established a quick response mechanism to meet their urgent production needs. This includes fast response, accurate source matching, fast quotation, and timely delivery.
3. Cost saving procurement: Refine cost management, reasonably control time and procurement costs, shorten procurement cycles, provide selection guidance based on customer needs, output procurement cost plans, and minimize costs as much as possible.
4. Extremely thorough import and export inspection process: authorized by the original factory through formal channels for direct procurement, traceable to the original factory quality, mature warehouse management, strict control of warehouse temperature and humidity, and ensuring the integrity of products during the inventory process.