Table of Contents
How is op amp different from BJT?
Basic difference is that amplifiers like BJT,FET canonly amplify a signal or voltage but op-amp not only amplify a signal but also do mathematical operations. op-amp has higher gain, higher input impedance, it is more immune to noise.
Why is CMOS better than BJT?
BJT consumes more power whereas CMOS consumes less power and allows you to increase density of transistor in circuit. Also, BJT has positive temperature coefficient that makes it less stable in higher temperature whereas CMOS is more stable in higher temperatures.
Why are FET op amps better than BJT op amps?
In some two stage op amps they construct 1st stage differential circuit with CMOS and 2nd stage buffer amplifier with BJT for better performance. The DC Power OR Quiescent power in FET is far less due to higher input impedance of FET. From manufacturing point and Low power operation FET stands better position than BJT.
What is the difference between amplifiers and op-amps?
Amplifiers can be either electronic or mechanical in common definition whereas operational amplifiers are electronic amplifiers. Amplifiers, in general, have a limited capability of amplifying DC signals but all op-amps are capable of amplifying DC signals.
Why is CMOS preferred over NMOS?
An advantage of CMOS over NMOS logic is that both low-to-high and high-to-low output transitions are fast since the (PMOS) pull-up transistors have low resistance when switched on, unlike the load resistors in NMOS logic. In addition, the output signal swings the full voltage between the low and high rails.
Which is faster BJT or CMOS?
Once the level of integration and power levels are taken into account, modern twists outperform bjt and bipolar-cmos (bicmos) in almost all cases. For current signal mode processing, bjt will be faster because current amplification does not involve big changes in connection potential.
What does the C in CMOS stand for?
complementary metal-oxide semiconductor
CMOS (complementary metal-oxide semiconductor) is the semiconductor technology used in the transistors that are manufactured into most of today’s computer microchips.