The experiment of circuit design based on operational amplifier and analog integrated circuit is carried out with multisim

I. Reverse Amplifier

A reversed-phase amplifier circuit built with a 741 chip:

Relationship between output voltage and input voltage:

Output Waveform and Input Waveform:

Ii. Voltage follower

The same phase amplifier built using 741:

Relationship between output voltage and input voltage:

Output Waveform and Input Waveform: (the Input Waveform is vertically translated)

3. Same phase amplifier

The following voltage follower is built with 741:

Relationship between output voltage and input voltage:

Output Waveform and Input Waveform:

Iv. Comparison of the lever principle of the opposite phase amplification and Mechanics

Homogeneous Amplifier

Reverse Amplifier

1. summation Amplifier

Understand how to analyze the reverse amplifier by using the virtual disconnection method, and easily obtain the output of the sum amplifier:

2, differential amplifier

Based on the theory of virtual short, the voltage at 7 and 4 is the same, the partial pressure of R1 and R2, and the partial pressure of R3 and R4:

The results are as follows:

3. Differential and Integrator

The same method is used to analyze the reversed-phase amplifier. The output of the differential amplifier and integrator can be obtained. However, the current through the capacitor is calculated here, and there is a formula with the differential and integral.

Output of the splitter:

Integrator output:

I. Reverse Amplifier

A reversed-phase amplifier circuit built with a 741 chip:

Relationship between output voltage and input voltage:

Output Waveform and Input Waveform:

Ii. Voltage follower

The same phase amplifier built using 741:

Relationship between output voltage and input voltage:

Output Waveform and Input Waveform: (the Input Waveform is vertically translated)

3. Same phase amplifier

The following voltage follower is built with 741:

Relationship between output voltage and input voltage:

Output Waveform and Input Waveform:

Iv. Comparison of the lever principle of the opposite phase amplification and Mechanics

Homogeneous Amplifier

Reverse Amplifier

1. summation Amplifier

Understand how to analyze the reverse amplifier by using the virtual disconnection method, and easily obtain the output of the sum amplifier:

2, differential amplifier

Based on the theory of virtual short, the voltage at 7 and 4 is the same, the partial pressure of R1 and R2, and the partial pressure of R3 and R4:

The results are as follows:

3. Differential and Integrator

The same method is used to analyze the reversed-phase amplifier. The output of the differential amplifier and integrator can be obtained. However, the current through the capacitor is calculated here, and there is a formula with the differential and integral.

Output of the splitter:

Integrator output: