CrazyEngineers Archive
Old, but evergreen and popular discussions on CrazyEngineers, presented to you in read-only mode.
@manivannan.mv • 14 Jul, 2008
what is the difference between transister and op-amp?😒
@just2rock • 14 Jul, 2008 transistor is a semiconductor device used to amplify or switch electronic signals. The transistor is the fundamental building block of computers, other modern electronic devices. Some transistors are packaged individually but most are found in integrated circuits.

operational amplifier, or op-amp , is a DC-coupled high-gain electronic voltage amplifier with differential inputs and, usually, a single output. Typically the output of op-am is controlled ethr by negative feedback, which largely determines the magnitude of its o/p voltage gain, or by positive feedback, which facilitates regenerative gain and oscillation.
@manivannan.mv • 04 Aug, 2008 what do you eant by gain in op-amp?
@manivannan.mv • 04 Aug, 2008 what do you meant by gain in op-amp?
@Dexter_Neo • 05 Aug, 2008 gain is Amplitude gain.it could be open loop and it could be closed loop also.

basic difference between Transistor and opamp is that an OpAmp is not a differential amplifeir where as a tranisistor is not.

And yess transistors are basic unit's in OPAMp's architecture.
@Dexter_Neo • 05 Aug, 2008 do u know the most imp thing is that the transistors are small signal amplifeirs where as opamp are small,medium,large signal amplifeirs.
@prestonee • 07 Aug, 2008 A key note: Op amps are made from transistors.

BJT transistors are the most commonly used due to lower inherent noise levels than a MOSFET

MOSFET transistors are also used in opamps, primarily custom chips using digital and analog since CMOS process is cheaper than a bicmos process. Also a mosfet has lower gate leakge current then a BJT so low power Op amps use Mosfets

JFET transitors are fairly rare in Op amps but do show up in very low noise Op amps at least in the input stage due to their very low noise characteristics.
@sauravgoswami • 08 Aug, 2008 hit the besics of electronic you will get ur ans mate!!,have a nice day
@Arp • 30 Jan, 2011 BJT used as differential amplifier is heart of operational amplifier..
opamp is a linear device provided with gain by using an another bjt configuration to provide enough gain as required..
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