Protoboard Wire 22 AWG x 6nos. Circuit Assembly a. The op-amp is placed in the lower central portion of the protoboard. The notch is positioned so that the pin 1 is at the top left. Each pin of the op-amp is made sure to have been inserted into a separate hole. The circuit is constructed as show in Figure 7. Variable Feedback Resistor, Rf a. A 4V peak-to-peak, 1 kHz sine wave is applied and set as input Vs.
The peak-to-peak amplitude of the output, Vo is measured and the gain, AV is calculated. The percentage errors are calculated. Variable Input Voltage, Vs. Still using the same circuit in the Part A: No. The input sine wave is set at a frequency of 1 kHz. The value for peak-to peak output voltage is measured for input voltage of 1V, 2V, 4V and 8V peak-to- peak respectively.
The results are tabulated in Table 7. The measured gain for each input is calculated. Variable Bias Voltages a. The same circuit in Part A: No. Using an input sine wave at a frequency of 1kHz, the amplitude of the input Vs is slowly increased from zero 0 volts to a value where the output Vo becomes distorted on either the positive or negative cycle or in other words becomes clipped. The peak-to-peak input and output voltages at the time of clipping are recorded in Table 7.
Part B: Non-inverting Amplifier a. DMM is used for setting accuracy. The non-inverting amplifier is built as shown in Figure 7. The frequency of the input sine wave is set to 1 kHz. The value for output voltage Vo when the peak-to-peak voltage Vs is set to 2V, 3V, 4V, and 5V respectively is measured. Virtually all topologies are realizable.
We will look at the controlledvoltage source forms first those using SP and PP negative feedback. A non-inverting amplifier is an op-amp circuit configuration which produces an amplified output signal.
This output signal of non-inverting op amp is in-phase with the input signal applied. In other words a non-inverting amplifier behaves like a voltage follower circuit. A non-inverting amplifier also uses negative feedback connection, but instead of feeding the entire output signal to the input, only a part of the output signal voltage is fed back as input to the inverting input terminal of the op-amp.
The high input impedance and low output impedance of the non-inverting amplifier makes the circuit ideal for impedance buffering applications. The circuit diagram of an ideal non-inverting amplifier is as shown in the figure below. An operational amplifier is a DC-coupled electronic component which amplifies Voltage from a differential input using resistor feedback. An op-amp circuit consists of few variables like bandwidth, input, and output impedance, gain margin etc. Different class of op-amps has different specifications depending on those variables.
You can learn more about Op-amps by following our Op-amp circuits section. An op-amp has two differential input pins and an output pin along with power pins. Those two differential input pins are inverting pin or Negative and Non-inverting pin or Positive.
The op amp non-inverting amplifier circuit provides a high input impedance along with all the advantages gained from using an operational amplifier. Observe that the offset and D. The input signal is applied to the inverting minus input.
The - input produces a o phase shift between input and output signal. The non-inverting plus input is grounded and is common to both the input and the output. Negative feedback degenerative is coupled from the output back to the input through the feedback resistor R f.
The ratio of Ri to R f will determine, the circuits voltage gain voltage gain for this circuit can be calculated using the formula. The input and feedback current are algebraically added as point G. Hence it is assumed to be zero or at ground potential the specific term used for this point is virtual ground.
Equation shows that closed loop gain of the inverting amplifier depends on the ratio of two external resistors R 1 and R f.
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