Question

Using a 741 op-amp for every stage, design this circuit:

The input stage has a voltage gain of 10 and input impedance of 50 K?.

The low pass filter stage has a Sallen-Key (VCVS) third order butterworth response and a cutoff frequency of 5KHz.

The output buffer stage has a voltage gain of 10.

Answer #1

Design an Op-Amp Circuit that takes an input from a low current
capacity voltage source (i.e. a high internal impedance source)
with voltage range of -15mV to 15mV, amplify it, adds a DC offset
so that the voltage is always positive filter it (LPF 1, 18.3 KHz)
and the convert it into digital output (reference voltage of ADC
12V). Also determine the minimum sampling rate of ADC

Design an active-RC low pass second order Butterworth filter for
a cutoff frequency of 1 kHz, and a pass band gain of 2 V/V. Use a
741 Op Amp. If using Table I, use a capacitor value of 0.1 μF for C
and C1, otherwise you may use any capacitors available in the lab.
If applicable, make an excel worksheet showing the calculations
required for the above design. Choose appropriate real
resistor values for the designed circuit and simulate this circuit...

Design an op-amp circuit that will provide an output voltage
equal to the average of three input voltages. You may assume that
the input voltages will be confined to the range -10V ?Vin ?10V.
Verify your design by using Multisim software and a suitable set of
input voltages.

Draw the circuit of second order low pass Butterworth filter and
design it at a high cutoff frequency of 1KHz. Draw the frequency
response of the designed filter.

Using 5 nF capacitors and ideal op amps, design a high-pass
unitygain Butterworth filter with a cutoff frequency of 4 kHz and a
gain of at least -32 dB at 800 Hz. 30 points a) Draw a circuit
diagram of the filter and label all the component values.

An active low pass filter (with op-amp), the capacitor value is 500 pf, the resistor value is 1kΩ and the input signal source is 20 V.
a)draw the complete circuit with the data provided in the
example
b) plot the frequency response graph of the filter, use at least
5 dots for the plot of the graph and identify in it the pass band
and the attenuation band.
c) determine the filter output voltage f = 100KHz and f =...

Design an op-amp circuit for a weighted summer that shifts the
dc level of the input signal vi(t) = 3 sin(t) V from zero to -3 V.
Assume that in addition to vi(t), you have a dc voltage source of
1.5 V available. Sketch the output signal waveform.

1. Design an inverting amplifier with gain of ×10, and input
impedance of 100Ω.
2. Design a non-inverting amplifier with a gain of ×10. Design
the amplifier so that the output current from the op-amp at maximum
output voltage +15V is no larger than 15 mA.
3. Design a current summing amplifier that finds the algebraic
sum of two input voltages: VOUT = - (V1 +
V2) . Design the amplifier so that output current from
the op-amp at maximum...

Use an ideal op amp to design a differentiator circuit having a
time constant of 10-5s using a 1-nF capacitor. Sketch
the magnitude and phase response of the circuit, indicating the
frequency at which the magnitude response equals 0 dB. A series
input resistor is added to limit the gain magnitude at high
frequencies to 100 V/V. Sketch the magnitude and phase responses of
this modified circuit on the same axes as the ideal differentiator.
How does the phase response...

Estimate the magnitude of the loop gain of the circuit .The
op-amp has the following parameters: differential input resistance,
rd = 1 M?, output resistance, ro = 100 ?,
open-loop gain, Aol = 105. Assume
R1 = 24.01 k? and R2 = 5.89 k?

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