OP Amps
What are linear devices?
- A linear circuit is one that has no nonlinear electronic components in it. It is called a linear circuit because the output of the circuit is a linear function of the input. - Also, when a sinusoidal voltage or current of frequency f is applied, any steady-state output of the circuit (the current through any component or the voltage between two points) is also sinusoidal with frequency f
What is an Operational amplifiers?
- Operational amplifiers are linear devices that have all the properties required for nearly ideal DC amplification. - fundamentally a voltage amplifying device designed to be used with external feedback components such as resistors and capacitors between its output and input terminals.
What are the Ideal laws of Op-amps?
1) The Zin (input impedance) is infinite or high and therefore no current can flow towards the amplifier on the input rails. 2) Zout (output impedance) is low so current can flow outwards or inwards to the main supply. 3) input voltage in the pos and neg will always be the same. 4) The gain of the Op-amp is very big (almost infinite) but it won't amplify the input signal by infinite because, with gain infinite, the output will saturate the input value.
What are examples of linear circuits?
A linear circuit is a circuit that has no nonlinear components in it. Examples of linear circuits are amplifiers, differentiators and integrators, or any electronic filters, or any circuit composed exclusively of ideal resistors, capacitors, inductors, op-amps (in the "non-saturated" region) and other linear circuit elements.
What is a comparator op-amp?
It is an operational amplifier IC that compares which voltage in the input is higher. Whenever the positive input is lower than the negative, the output will be negative (low) and vice versa. It is used to get a high square wave when it detects a high input.
What is signal conditioning?
Most analog signals require some forms of preparation before the signals digitized. Signal conditioning is the form that prepares the analog signals to be digitized. Signal conditioning is the manipulation of an analog signal in such a way that it meets the requirements of the next stage for further processing.
What are the different types of Basic Op-amp?
The different types of Op-amps are Voltage comparator, Voltage follower, Inverting Amplifier, Non-inverting amplifier, Differentiator Amplifier, and integrator amplifier.
Why are Op-amps used?
They are used extensively in signal conditioning, filtering, or to perform mathematical operations such as add, sub, integration and differentiations.
Why are linear circuits important?
because they can process analog signals without introducing intermodulation distortion. This means that separate frequencies in the signal stay separate and do not mix, creating new frequencies.
What are examples of nonlinear electronic components?
diodes, transistors, and iron core inductors and transformers when the core is saturated. Some non linear circuits include mixers, modulators, rectifier, radio receiver detectors and digital logic circuits.
