Conservapedia - User contributions [en]

Talk:Operational amplifier

2009-12-22T04:30:20Z

NickM:

Please, feel free to expand. I will work on it more when I have time Suggestions:

*Difference between ideal and non-ideal op-amps

*Insert pictures and mathematical description of most common type of op-amp configurations: inverting, non-inverting, differentiator, and integrator. If you feel ambitious: voltage follower, comparator, instrumentation, schmitt trigger, etc. Also, real life applications would be great.

*Anything you feel like!

[[User:NickM|NickM]] 23:29, 21 December 2009 (EST)

Talk:Operational amplifier

2009-12-22T04:29:38Z

NickM: Created page with 'Please, feel free to expand. I will work on it more when I have time Suggestions: - Difference between ideal and non-ideal op-amps - Insert pictures and mathematical description ...'

Please, feel free to expand. I will work on it more when I have time Suggestions:
- Difference between ideal and non-ideal op-amps
- Insert pictures and mathematical description of most common type of op-amp configurations: inverting, non-inverting, differentiator, and integrator. If you feel ambitious: voltage follower, comparator, instrumentation, schmitt trigger, etc. Also, real life applications would be great.
- Anything you feel like!
[[User:NickM|NickM]] 23:29, 21 December 2009 (EST)

Operational amplifier

2009-12-22T04:24:49Z

NickM:

An operational amplifier (op-amp) is an [[intergrated circuit ]] that takes two input signals and amplifies the difference between the signals. It is called an op-amp because it can be used to perform mathematical operations like addition, subtraction, integration, and differentiation. Op-amps are characterized by high gain, high input impedance, and low output impedance. In fact, the open loop gain is typically so high as to be unpractical (with the exception of comparator circuits). A negative feedback loop is usually introduced to decrease and control the voltage gain. The most common general purpose op-amp is the LM741<ref>http://www.allaboutcircuits.com/vol_3/chpt_8/3.html</ref>.
===Configuration===
Op-amps are usually packaged with 8 terminals, although only 5 are used regularly. These five are:
*Inverting input (<math>V_-</math>)
*Non-inverting input (<math>V_+</math>)
*Positive power supply (<math>V_{S-}</math>)
*Negative power supply (<math>V_{S+}</math>)
*Output (<math>V_{out}</math>)
===Golden Rules===
An Ideal op-amp with a negative feedback loop and whose output is not saturated operates according to two simple rules:
#The inverting and non-inverting terminals are at the same voltage
#There is not current flow into or out of either the non-inverting or inverting inputs.
These two rules allow simple mathematical expressions to describe very complex circuits.
===References===
<references/>

[[Category:Electrical Engineering]]

Op-amp

2009-12-22T04:18:24Z

NickM: Redirected page to Operational amplifier

#REDIRECT[[Operational amplifier]]

Operational amplifier

2009-12-22T04:16:37Z

NickM: Created page with 'An operational amplifier (op-amp) is an intergrated circuit that takes two input signals and amplifies the difference between the signals. It is called an op-amp because it ...'

An operational amplifier (op-amp) is an [[intergrated circuit ]] that takes two input signals and amplifies the difference between the signals. It is called an op-amp because it can be used to perform mathematical operations like addition, subtraction, integration, and differentiation. Op-amps are characterized by high gain, high input impedance, and low output impedance. In fact, the open loop gain is typically so high as to be unpractical (with the exception of comparator circuits). A negative feedback loop is usually introduced to decrease and control the voltage gain. The most common general purpose op-amp is the LM741.
===Configuration===
Op-amps are usually packaged with 8 terminals, although only 5 are used regularly. These five are:
*Inverting input (<math>V_-</math>)
*Non-inverting input (<math>V_+</math>)
*Positive power supply (<math>V_{S-}</math>)
*Negative power supply (<math>V_{S+}</math>)
*Output (<math>V_{out}</math>)
===Golden Rules===
An Ideal op-amp with a negative feedback loop and whose output is not saturated operates according to two simple rules:
#The inverting and non-inverting terminals are at the same voltage
#There is not current flow into or out of either the non-inverting or inverting inputs.
These two rules allow simple mathematical expressions to describe very complex circuits.