Electronic Devices - Operational Amplifiers - Discussion
Discussion Forum : Operational Amplifiers - True or False (Q.No. 4)
4.
A good op-amp has low voltage gain, low output impedance, and high input impedance.
Discussion:
3 comments Page 1 of 1.
Mohd Mujahid said:
10 years ago
Ideally:
I/P resistance should be zero, O/P resistance and voltage gain should be infinite.
Practically:
I/P resistance should be low, O/P resistance and voltage gain should be high.
I/P resistance should be zero, O/P resistance and voltage gain should be infinite.
Practically:
I/P resistance should be low, O/P resistance and voltage gain should be high.
Vidhyalakshmi said:
1 decade ago
What is mean by noise in circuit devices?
Manish said:
1 decade ago
A good op-amp is usually considered to have the following properties:
#Infinite open-loop gain.
#Infinite voltage range available at the output.
#Infinite bandwidth with zero phase shift and infinite slew rate.
#Infinite input impedance and so zero input current and zero input offset voltage.
#Zero output impedance.
#Zero noise.
#Infinite Common-mode rejection ratio (CMRR).
#Infinite Power supply rejection ratio.
#Infinite open-loop gain.
#Infinite voltage range available at the output.
#Infinite bandwidth with zero phase shift and infinite slew rate.
#Infinite input impedance and so zero input current and zero input offset voltage.
#Zero output impedance.
#Zero noise.
#Infinite Common-mode rejection ratio (CMRR).
#Infinite Power supply rejection ratio.
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