Two voltages, +0.6 V and -1.4 V, are applied to the two input resistors of a summation amplifier. The respective input resistors are 400 k2 and 100 kN, and the feedback resistor is 200 kN. Determine the output voltage. Ans. 2.5V
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- Assume for a moment that perfectly accurate resistors were available for feedback networks; that is resistor tolerance is 0%. Then any deviation from the value set by the feedback resistor ratio is caused by insufficient raw op-amp gain. What minimum raw gain would be needed to get within 1% if an intended overall gain of 10? What if the intended gain is 100 instead?Q2/B)- Show the connection of three combination op-amp stages ( Parallel and series connection) using an LM348 IC to provide outputs that are 110, 400, and 2601 times larger than the input. Use a feedback resistor of Rf = 500 k? in all stages, while can use only (R= 50 k? for first stage), (R= 25 k? for second stage), and (R= 10 k? for third stageDraw the circuit of 3 op-amp configuration of instrumentation amplifier andderive the gain equation. Consider all internal resistors to be equal.
- Please answer this two part question A) It is known that when an Op-amp is operated using the negative feedbackconfiguration, the output impedance reduces. Derive an expression that proves this. B) It is known that when an Op-amp is operated using the positive feedbackconfiguration, the output impedance increase. Derive an expression that proves this.Given in the figure is a two-stage amplifier design that employs negative feedback. Answer the following questions. Use the notation (R1 + R2 + ... + Rn) for series resistors and (R1 || R2 || ... || Rn) for parallel resistors for clarity and ease. Assume that the transistors are already biased properly in the saturation region and ro1 = ro2 → ∞. Also assume that the capacitors have infinite capacitance. 1.) Find the expression for the open loop gain Av 2.) Derive the resistance Rin which is the resistance that can be seen at the input port of the amplifierSuppose the op amp shown has an fT of 1 MHz. What is the phase margin of the amplifier?
- A noninverting amplifier is being designed to have a closed-loop gain of 36 dB. What op-amp gain is required to have the gain error less than 0.15 percent?A certain op-amp has three internal amplifier stages with midrange gains of 30 dB, 40 dB, and 20 dB. Each stage also has a critical frequency associated with it as follows: fc1 = 600 Hz, fc2 = 50 kHz, and fc3 = 200 kHz. (a) What is the midrange open-loop gain of the op-amp, expressed in dB? (b) What is the total phase shift through the amplifier, including inversion, when the signal frequency is 10 kHz?Which op-amp network is commonly used to reduce the effect of noise on comparator circuits (Schmitt trigger arrangement)?Using an output networkUsing a negative feedback networkUsing an input networkUsing a positive feedback network