Design an audio amplifier

Question # 40619
  • Engineering
    2 months ago
    2 months ago


    Project 3 Due on July 15, 2019
    Design an audio amplifier (the circuit of which is given below), using a single LM741A op-amp, with the following characteristics: gain= 20 dB, input impedance Zin = 10K, -3dB point= 20 Hz. Use the non-inverting configuration, and roll off the gain at low frequencies with an input coupling capacitor sized to meet the low-frequency gain specification and to reduce the effects of input offset voltage. Use proper design to minimize the effects of input bias current on output offset. Assume that the signal source has zero output impedance Zout = 0. Determine the bandwidth of your audio amplifier design and calculate the roll-off (reduction) from the mid-frequency gain (in dB) at the highest audio frequency of 20 kHz. Determine the highest input sinusoidal signal peak amplitude Vm. , in the audio frequency range of 20 Hz to 20 kHz, that may be amplified by your design without distortion. Use the attached specification sheets for the LM741 to obtain the op-amp characteristics data you need for the design; select the worst-case values for the characteristics needed in your design. Show all the equation development in your report.
    Tabulate your design results here:                    Value
    Design parameter
    Feedback resistance, RF,
    Input resistance RI,
    Compensation resistance, Rc,
    Input coupling capacitance, Cl,
    Closed-loop bandwidth of amplifier, BWcl,,
    Op amp unity-gain frequency(bandwidth)
    Closed-loop gain at 20 kHz (in dB)
    Roll-off (decrease) in closed-loop gain at 20 kHz (in dB)
    Op amp output slew rate
    Maximum input audio signal amplitude, Vm. (that can be amplified without distortion)
    Audio amplifier circuit:
    Audio Signal Source
    see attached file for diagram


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