Devices incorporating an inverting amplifier are widely used in everyday life and in production. Circuits using this element are used to amplify / attenuate analog signals, they are used in many household appliances: tape recorders, televisions, radios, etc. In production, an inverting amplifier is widely used in circuits for monitoring, protecting or controlling the operation of various components and mechanisms. It is indispensable for many devices that operate in conditions where maximum performance is required. Good performance has made it a staple in many electronic circuits. The device is compact, has built-in overload protection and operates in a fairly wide temperature range.
The principle of its operation is quite simple. It converts the input signal in accordance with the embedded coefficient, inverts it. In other words, if the inverting amplifier has a gain equal to unity, then at the output we will get a mirror image of the input signal. This property is widelyused to implement a variety of functions: division, multiplication, summation, etc.
Unfortunately, in practice, the operation of the device differs from the ideal. The main problem is the drift of the output signal around zero. This occurs when the device has an unbalanced or unstable power supply or a change in the temperature regime of its operation.
This affects the quality of analog conversions and, ultimately, affects the operation of all electronics. An inverting amplifier can be designed on various elements. In addition, there are additional solutions that allow you to partially or completely solve the above problem.
The inverting operational amplifier has good performance. This is a modern small-sized device, assembled according to certain principles. It is widely used in amplifying cascades for various purposes. In particular, he showed himself well in electric drive control devices. The operational amplifier used to create this device has a high gain, which allows you to implement the most daring ideas. It is also necessary to note the high input and low output impedance of the device.
The disadvantages in its use, in addition to the drift of the signal around zero, include the non-linearity of the characteristics of the device when it works in control circuits. We are talking about boundary areas that define the rangehis work on tension. If the device enters "saturation", then it will take more time to exit this state. This can become critical for circuits whose main performance criterion is speed.
A measuring amplifier occupies a special place. It implements the classical subtraction / summation circuit, and can be assembled on the basis of an operational amplifier.
Despite the advent of digital devices, operational amplifiers continue to be actively used in the design of various circuits. The main criteria for this are the following: high reliability in operation, ease of installation and repair, low cost of the device.
