Explain basic working of ideal operational amplifier, Electrical Engineering

Q. Explain basic working of Ideal operational amplifier?

The operational amplifier, known also as op amp, consists of several transistors, diodes, capacitors, and resistors. It is available in integrated-circuit form for less than one U.S. dollar. Being inexpensive, compact, and versatile, operational amplifiers are used in a variety of simple circuits.

Op-amp circuits, as we will see later, usually contain negative feedback. Op-amp circuits themselves can be regarded as building blocks. These blocks are characterized by their input resistance, output resistance, and open-circuit voltage amplification. The symbol for the op amp is shown in Figure. Two terminals labeled + and - are available for inputs. The voltages of these terminals are labeled with respect to the common terminal,

1801_Explain basic working of Ideal operational amplifier.png

1326_Explain basic working of Ideal operational amplifier1.png

denoted by a ground symbol. The output voltage is related to the difference between the two input voltages as

vo = A(vp - vn)

where A is the open-loop voltage gain. Thus, the op amp is basically a form of differential amplifier, in which the difference vp - vn is amplified. For an output voltage on the order of 12 V, the difference voltage vd is on the order of 0.12 mV, or 120 µV. The input impedance Zi is on the order of 1 M, while the output impedance Zo is on the order of 100  to 1k.

Posted Date: 6/21/2013 1:03:58 AM | Location : United States







Related Discussions:- Explain basic working of ideal operational amplifier, Assignment Help, Ask Question on Explain basic working of ideal operational amplifier, Get Answer, Expert's Help, Explain basic working of ideal operational amplifier Discussions

Write discussion on Explain basic working of ideal operational amplifier
Your posts are moderated
Related Questions
(a) Explain what asynchronous transmission is and give two advantages and two disadvantages of using this type of transmission. (b) One of the goals of multiplexing is efficienc

Critical Rate of  Rise of Current The maximum  rate of  increase of current  during  on state  which  the SCR  can tolerate is called  the critical rate of rise  of current  f

i need tutor for teaching me matrix converter based upfc modelling and building using matlab

Variation of Energy Bands with Alloy Composition The  band  structures  of  III-V  ternary  and  quaternary  compounds  modifies  as  their composition is varied. There

a) Describe Schmitt trigger with the help of transfer characteristics. b) Also get the expression of hysteresis voltage VH and output waveform for sinusoidal input signal

Explain the working of an npn transistor. Working of npn transistor: In an npn transistor is demonstrated in the figure. The emitter base junction is forward biased whereas

Draw and explain the circuit of feedback amplifier

Astigmation control: In most modern oscilloscopes there is an additional focusing control marked Astigmation . This is used to correct an effect which exactly is analogous to

how do ratos connect to engineering

Describe hall effect?also describe it''s mathematical analysis and it''s properties