võimendusskeem

Võimendusskeem refers to an electronic circuit designed to increase the amplitude of a signal. This signal can be of various types, such as electrical voltage, current, or power. Amplifiers are fundamental components in a vast range of electronic devices, from simple audio systems to complex communication equipment and industrial controls.

The primary function of a võimendusskeem is to take a weak input signal and produce a stronger output signal that is a faithful, amplified replica of the input. This amplification is achieved by utilizing an external power source, which the amplifier controls to shape the output signal. Without this power source, the amplifier would be incapable of increasing the signal's strength.

There are various types of võimendusskeem, categorized by their function and the way they process the input signal. Common classifications include voltage amplifiers, current amplifiers, transconductance amplifiers (which convert input voltage to output current), and transresistance amplifiers (which convert input current to output voltage). They can also be classified by their frequency response, such as audio amplifiers, radio frequency (RF) amplifiers, and wideband amplifiers.

The performance of a võimendusskeem is typically measured by parameters like gain (the ratio of output to input amplitude), bandwidth (the range of frequencies over which amplification is effective), distortion (unwanted alteration of the signal), and efficiency (how much of the power source is converted into useful output signal). The design of a võimendusskeem involves careful selection of active components like transistors or operational amplifiers, along with passive components such as resistors and capacitors, to achieve the desired amplification characteristics.