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Chapter 11: NONIDEAL OPERATIONAL AMPLIFIERS AND FEEDBACK AMPLIFIER…
Chapter 11: NONIDEAL OPERATIONAL AMPLIFIERS AND FEEDBACK AMPLIFIER STABILITY
11.2: Analysis of Circuits containing Nonideal Op Amps
A real operational amplifier provides a large but noninfinite gain. This affects the way non-inverting and inverting amplifiers behave.
The behavior is affected by the way we calculate mathematical values such as the closed loop gain, the loop gain, the beta value, and other input and output values for the circuit
11.3: Series and Shunt Feedback Circuits
There are four different types of feedback amplifiers that are used in everyday life
These four types include voltage amplifiers, transimpedance amplifiers, current amplifiers, and transconductance amplifiers
11.6: Shunt-Shunt Feedback-Transresistance Amplifiers
Shunt-Shunt Feedback Amplifiers are another one of the four different types of feedback amplifiers. Typically, these amplifiers are used to convert input current to output voltage
One of the key characteristics of this amplifier is that they have low input impedance and low output impedance. This can be used in Feedback Control Systems.
11.4: Unified Approach to Feedback Amplifier Gain Calculation
It is important to know that the loop gain also determines feedback amplifier stability.
It determines the overall gain, input resistance, and output resistance of the feedback amplifier, which plays a big role in its stability.
11.5: Series-Shunt -Voltage Feedback Amplifiers
Series-Shunt Feedback Amplifiers are one of the four different types of feedback amplifiers. Typically, these amplifiers are used to amplify voltage
One of the key characteristics of this amplifier is that they have high input impedance and low output impedance. This can be used in buffering applications.
11.7: Series-Series Feedback-Transconductance Amplifiers
Series-Series Feedback Amplifiers are another one of the four different types of feedback amplifiers. Typically, these amplifiers are used to amplify current.
One of the key characteristics of this amplifier is that they have high input impedance and high output impedance. This can be used in Transconductance Applications.
11.8: Shunt-Series Feedback- Current Amplifiers
Shunt-Series Feedback Amplifiers are another one of the four different types of feedback amplifiers. Typically, these amplifiers are used to convert input voltage to output current.
One of the key characteristics of this amplifier is that they have low input impedance and high output impedance. This can be used in Power Amplifiers & Motor Drives.
11.9: Finding the Loop Gain using Successive Voltage and Current Injection
he method of successive voltage and
current injection can be used to measure the loop gain without opening the feedback loop
To use this method, an arbitrary point P within the feedback loop is selected, and a voltage source is inserted into the loop.
11.1: Classic Feedback Systems
In high precision applications it is important to know, or to control by design, just how far the actual closed loop gain deviates from the ideal value of the gain.
We do this by calculating the gain error and the fractional gain error for these classic feedback systems.