Võimendusahel

Võimendusahel is the Estonian term for an amplifier circuit. An amplifier circuit is an electronic circuit that increases the amplitude of a signal. This signal can be voltage, current, or power. Amplifier circuits are fundamental components in many electronic devices, playing a crucial role in audio systems, radio communications, and various measurement instruments.

The basic principle of operation involves a semiconductor device, typically a transistor or an operational amplifier (op-amp), which acts as a controlled switch. A small input signal is used to control a larger flow of current from a power supply. This larger current flow is then shaped to replicate the input signal but with increased amplitude.

There are various types of amplifier circuits, each designed for specific applications and performance characteristics. Common classifications include voltage amplifiers, current amplifiers, and transconductance amplifiers, distinguished by whether they amplify voltage, current, or the ratio of output current to input voltage. Amplifiers can also be categorized by their frequency response, such as audio amplifiers, radio frequency (RF) amplifiers, and broadband amplifiers. The design of a võimendusahel involves careful selection of components and circuit topology to achieve desired gain, bandwidth, linearity, and efficiency.