Summing Amplifier R1 R2 V1 R3 Vo V2 (R21 2V,+ R3 R2V2 R, Basic Differential Amplifier Circuit R1 V1 R, (V, -v,) V out R Vout V2 R1 Instrumentation Amplifier Circuit R2 2R, 1+ R3 |(V -V,) V <)- V1 out Ro R, R2 R3 R1
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- Suppose that each output channel of a computer’ssound card can be represented by a 1-V ac sourcein series with a 32-Ω resistor. Each channel ofthe amplifier in the external speakers has an inputresistance of 20 k , and must deliver 10 W intoan 8-Ω speaker. (a) What are the voltage gain, currentgain, and power gain required of the amplifier?(b) What would be a reasonable dc power supplyvoltage for this amplifier?Problem 1: Consider the circuit shown below. The transistor parameters are Kn1 = 0.5 mA/V2 , Kn2 = 0.2 mA/V2 , VT N1 = VT N2 = 1.2 V, and λ1 = λ2 = 0. The quiescent drain currents are ID1 = 0.2 mA and ID2 = 0.5 mA. (a) Determine the small-signal voltage gain of the given multistage amplifier. Answer: -6.14. (b) Calculate the small-signal output resistance Ro. Answer: 1.32 kΩ. Problem 2: The transistor parameters for the given circuit are β1 = 120, β2 = 80, VBE1 (on) = VBE2 (on) = 0.7 V, and VA1 = VA2 = ∞. (a) Determine the quiescent collector current in each transistor. Answer: IC1 = 2.253 mA, IC2 = 69.73 mA. (b) Find the small-signal voltage gain Av = vo/vs. Answer: 0.99. (c) Determine the input and output resistances Rib and Ro. Answer: Rib = 467.6 kΩ, Ro = 0.512 ΩQuestion 1: a. For the circuit shown, determine V0 when R1 = 1.8 kΩkΩ, R2 = 80 kΩ, Vx = 100 mV, Vy = 10 mV, and Vcc = 15V. b. For the circuit shown, determine R1 such that V0=m×(Vx−Vy). Assume mmm = 5.0 and R2 = 50 kΩ and that the op-amp is in its linear region of operation.
- Assume an operational amplifier is working on inverting amplifier in which it takes input resistance and feedback resistance of 30ohm and 60ohm respectively.If input voltage is applied at 150 volt then examine following parameters. Calculate the output voltage of amplifier. Options: A)150 volt B)200 volt C)250 volt D)300 voltAssume an operational amplifier is working on inverting amplifier in which it takes input resistance and feedback resistance of 30ohm and 60ohm respectively.If input voltage is applied at 150 volt then examine following parameters. If input voltage is changed from inverting terminal to non inverting terminal then calculate its output voltage. Options: A)400 volt B)450 volt C)500 volt D)550 voltAssume an operational amplifier is working on inverting amplifer in which it takes input resistance and feedback resistance of 30 ohm and 60 ohm respectively. If input voltage is applied at 150 volt then examine following parameters1.Evaluate over gain of amplifier2.Evaluate the gain of opamp if input voltage is applied on non inverting amplifier3.Calculate output voltage of amplifier4.If input voltage is changed from inverting terminal to non inverting terminal then calculate its output voltage5. If we add one more input resistance of 40 ohm at inverting terminal at 20 voit input supply voltage and working as adder then calculate the output voltage.
- Design a MOSFET differential pair which produces a differential output voltage of 2 V when (a) v1 =-90 mV and v2 = +90 mV (b) when one of the transistor grounded. The transistor parameters are Vtn =0.8 V, kn’(W/L) = 0.4 mA/V2 and λ=0. Choose the supply voltage to be ±10V with a constant currentsource of 5 mA. Also determine the maximum common mode input voltage.Compare this operational amplifier K2-W to the more modern ADA4523-1; under whatconditions would each be the best choice? K2-W Picture Given in submission ADA4523-1 Link: https://www.analog.com/en/products/ada4523-1.htmlIn any operational amplifier if two input signal are given at 45 volt and 35 volt at positiveterminal and negative terminal simulatneously. The circuit is working with open loop gainof 10, then solve lowing i)Calculate common mode rejection ratio of amplifier if output voltage is 100 volt ii)If input voltage at positive terminal is changed from 45 volt to 55 volt then find outputvoltage of amplifier keeping gain of 10. iii)Calculate CMRR if voltage is changed at positive terminal from 45 volt to 55 volt and ouputvoltage is 100 volt. iv)if gain is changed from 10 to 20 then find output voltage of amplifier. v)Determine the output voltage of operational amplifier.
- (a) An instrumentation amplifier shown in Figure 1 is an anplifier of low-level signals used in process control or measurement applications and conmercially available in single-package units: (i) Show that Vo=R3/R2(1+2R1/Rg)(v2−v1). (ii) Assume R1=50kohms and R2=R3. If Rg is a tunable resistor with resistance ranging from 1000 ohms to 10k ohms, what is the range of variable gain? (iii) Assume R1=10k ohms and R2=R3,∣v2−v1∣<=120mV and Vcc=12 V. In order to keep the op-amp circuit work in linear region, what is the minimum value of Rg ? (iv) State TWO characteristics of this op-amp circuit.Q2.4 Which of the following is true for an ideal difference amplifier?A) The Common Mode Suppression Rate is zero.B) The Common Mode suppression ratio is always negative.C) The common mode gain is zero.D) The differential mode gain is zero.q23/ A non-inverting op-amp circuit has the open loop gain of 257 and the resistances R1=4.1 kΩ and R2 = 6860 Ω . Calculate (a) The actual value of voltage gain (b) Considering the finite open loop gain, the ideal value of gain(c) Error, when ideal voltage gain is compared with actual voltage gain and The percentage error, when ideal voltage gain is compared with actual voltage gain.