What is a transistor amplifier?
A transistor amplifier is an electronic circuit that uses a semiconducting transistor instead of a tube or an integrated chip of the circuit to amplify electrical signals. The transistor amplifier is usually used in audio applications and provides excellent performance in a relatively small package. It has largely replaced the amplifier of the vacuum tube signal and remains a strong competitor of a more modern integrated circuit (IC).
before the invention of the transistor in 1947 used vacuum tubes. The vacuum tubes were large, bulky, fragile and ineffective and required time to warm up. Transistors eliminated all these problems and at the same time offered the ability to amplify signals with much less distortion. In addition, they were able to make more powerful signals, allowing some transistor amplifiers to release hundreds of watts per channel. Their small size and low energy consumption also allowed the invention of portable sound components powered from batteries such as transistor radio.
The structure of the perimeter of the transistor amplifier is relatively simple. In it, the power supply is connected to the transistor collector terminal and the signal to be amplified is brought to the basic terminal. The transistor uses a signal at the base to determine how much energy from the collector flows through its gateway to the emitter terminal, which converts the amplified signal. If the transistor is compared with the faucet valve, the collector would be a power pipe, the emitter would be where the water came out, and the base would be a hand that turned on the pin, off or somewhere between.
amplifiers using IC chips began to replace the transistor amplifier at the age of 60. The IC chip combined more electronic components for one small piece of silicon, allowing him to make more in a much smaller space. Poor sound quality and very limited performance function PL PLACEED These types of amplifiers. Over the years, however, this technology has improved to the extent that inA number of portable and cheaper domestic audio components use IC amplifiers.
Even at low ICS costs, many domestic audio components still use transistor amplifiers, although they are often described as discrete amplifiers. This type of circuit is predominant in power amplifiers and in the final output phase of amplifiers that both take the signal at the level of the preamplifier and amplify it for output to the speakers. However, some of the top source components and preamplifiers also use transistor amplifiers. In both cases, these amplifier circuits use semiconductor transistors of metal oxide oxide (MOSFETS) as a source of amplification.