What is dominant pole compensation in op amp?
Dominant-pole compensation. It is an external compensation technique and is used for relatively low closed loop gain. A pole placed at an appropriate low frequency in the open-loop response reduces the gain of the amplifier to one (0 dB) for a frequency at or just below the location of the next highest frequency pole.
What is the use of the compensation capacitor in op amp?
Explanation: Compensation capacitor in the internal structure of op-amp to improve its frequency response, increasing its stability. It also decreases the slew rate of the op-amp.
What is meant by dominant pole?
Dominant pole is a pole which is more near to origin than other poles in the system. The poles near to the jw axis are called the dominant poles. Following , we know that the real-axis between the first two poles, and the real axis after the third pole are all on the root-locus.
What is pole op-amp?
Op Amp Frequency Response Single-pole Amplifiers. General purpose op amps are typically low-pass amplifiers with high gain at dc and a single-pole frequency response.
What is pole in op amp?
When a capacitor is introduced between the input and output sides of the amplifier with the intention of moving the pole lowest in frequency (usually an input pole) to lower frequencies, pole splitting causes the pole next in frequency (usually an output pole) to move to a higher frequency.
What is the need for negative feedback in amplifiers?
The applied negative feedback can improve its performance (gain stability, linearity, frequency response, step response) and reduces sensitivity to parameter variations due to manufacturing or environment. Because of these advantages, many amplifiers and control systems use negative feedback.
Which device is used in compensation technique?
Explanation: Compensation techniques refer to the use of temperature sensitive devices such as thermistors, diodes, transistors, sensistors etc to compensate variation in currents.