Podcast
Questions and Answers
What is the common name for a noninverting amplifier with feedback?
What is the common name for a noninverting amplifier with feedback?
Voltage Series Feedback Amplifier
What is the equation for open-loop voltage gain (A)?
What is the equation for open-loop voltage gain (A)?
A = v_o / v_id
What is the equation for closed-loop voltage gain (A_F)?
What is the equation for closed-loop voltage gain (A_F)?
A_F = v_o / v_in
What is the term used for the gain of the feedback circuit?
What is the term used for the gain of the feedback circuit?
Signup and view all the answers
Negative feedback means that the feedback voltage opposes the input voltage.
Negative feedback means that the feedback voltage opposes the input voltage.
Signup and view all the answers
What relationship does the equation v_id = v_in - v_f define?
What relationship does the equation v_id = v_in - v_f define?
Signup and view all the answers
Study Notes
Voltage Series Feedback Amplifier (Non-inverting Feedback Amplifier)
- A non-inverting amplifier configuration where the input signal is applied to the non-inverting terminal of the op-amp.
- Composed of an operational amplifier (op-amp) and a feedback circuit including two resistors, R1 and RF.
- The circuit enhances the stability and accuracy of voltage gain through feedback.
Key Definitions
- Open-loop Voltage Gain (A): Represents the voltage gain of the op-amp without feedback, calculated as A = vo/vid, where vo is the output voltage, and vid is the input differential voltage.
- Closed-loop Voltage Gain (AF): Represents the voltage gain with feedback, expressed as AF = vo/vin, where vin is the input voltage.
- Gain of the Feedback Circuit (B): Defined as B = vo/vf, where vf is the feedback voltage.
Feedback Mechanism
- Negative feedback is utilized, where the feedback voltage (vf) opposes the input voltage (vin), maintaining system stability.
- The relationship between input variables is articulated through Kirchhoff’s voltage equation: vid = vin - vf.
Operational Amplifier Dynamics
- The op-amp amplifies the difference between the input voltages (vin and feedback voltage vf).
- The presence of negative feedback allows for better control of the output voltage, reducing the impact of variations in op-amp gain.
Closed-Loop Configuration
- Closed-loop voltage gain AF can be determined using the equation: vo = A(v1 - v2), where v1 and v2 correspond to the non-inverting and inverting inputs, respectively.
- Negative feedback increases linearity and bandwidth while reducing distortion in amplifier circuits.
Engineering Resources
- Essential textbooks for further study include:
- Ramakant A. Gayakwad’s “Op-Amps and Linear Integrated Circuits” (2000)
- Sergio Franco’s “Design with Operational Amplifiers and Analog Integrated Circuits” (2002)
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz focuses on the Voltage Series Feedback Amplifier, particularly the non-inverting feedback configuration used in linear integrated circuits. Drawing from key textbooks, it covers concepts and applications pertinent to operational amplifiers. Test your knowledge on this essential topic in electronics!
