Operational Amplifiers

Learn the Basic Knowledge of Operational Amplifier (6)2018/01/021. Why do the amplifiers circut made of operational amplifiers generally use the inverting input?(1) The major difference between inverting input method and the in-phase input method is:Inverting inpu...
the Basic Knowledge Points to Learn Operational Amplifier (5)2018/01/021, The op amp model is always considered a bit strange. The first is the "virtual short", because of the "virtual short", when the op amp is connected into the same amplifier, the two input potentials...
the Basic Knowledge Points to Learn Operational Amplifier (4)2018/01/021. Why does op amp generally work in reverse proportion? The significant difference between the reserve input method and the phase input method is: Reserve input method, due to the termination in phas...
The Basic Knowledge of the Operational Amplifier (3)2018/01/021. The input signal is directly added to the same phase input end, and the reverse input terminal is grounded by resistance. Why is U_ =U + =Ui ≠ 0? Isn't that virtual ground?Besides, forming the "vi...
Learn the Basics of Operational Amplifier (2)2018/01/021. The operation amplifier is connected to the integrator. What is the fuction of the parallel resistance RF on both ends of the integrated capacitor?(1) Bleeder resistance is used to prevent output v...
Learn the Basic Knowledge of Operational Amplifier (1)2018/01/021. There is a balancing resistance in general anti-phase/phase amplification circuit. What is the role of this equilibrium resistance?(1) Provide a suitable static bias for the transistors inside the ...
How do We Get the Result of2018/01/02The starting point is the formula (1) which is the characteristics of the operational amplifier and is no problem.And then we make two important assumptions,The first is that the output voltage of the...
Why is the Open Loop Gain of the Ideal Operational Amplifier Infinitely Large?2018/01/02(1) the actual open loop gain of the operational amplifier is more than 100 thousand, very large, therefore, the open loop gain of the actual operational amplifier is thought to be infinitely large, a...