Howtosignalprocessing
- Why closed-loop systems have higher bandwidth?
- What is the bandwidth of a closed-loop system?
- What is the bandwidth of a closed-loop op amp circuit as compared to open-loop circuit?
- What is the 3dB bandwidth of the closed-loop configuration?
Why closed-loop systems have higher bandwidth?
As the transient response of the system is improved by the use of feedback and it causes the settling time to reduce and the closed-loop system has higher bandwidth than open-loop systems and this implies an increase in the speed of response.
What is the bandwidth of a closed-loop system?
The bandwidth of a closed-loop control system is defined as the frequency range where the magnitude of the closed loop gain does not drop below −3 dB as shown in Figure 6.54.
What is the bandwidth of a closed-loop op amp circuit as compared to open-loop circuit?
Bandwidth is normally measured at the 3dB point of the frequency response and in the case of an op-amp (open-loop) this will be at 24Hz in the diagram. If closed loop components were present, the gain would be reduced to (say) 20dB (blue line) but the bandwidth would increase to 1MHz.
What is the 3dB bandwidth of the closed-loop configuration?
The bandwidth of the closed-loop system is usually defined by the -3 dB bandwidth, which is the frequency at which the Bode plot of the ���� transfer function crosses the -3 dB point when moving from low frequency to high frequency.
