An operational amplifier (Op-Amp) circuit is built to measure the temperature of an exothermic process in a lab. The circuit uses a thermistor (Resistance Temperature Detector) to monitor the target temperature and a voltmeter to measure the output voltage of the Op-Amp ciruit. Since the thermistor is a passive device, it requires and external battery to provide useful input, as shown in the ciruit diagram in attachment. The relationship between the resistance and temperature in the thermistor is relatively linear over a Temperature (T) range of 0deg Celsius and 200deg Celsius and is defined by Rt = 100 + 0.005*T. What will the Voltmeter read if the temperature of the reaction is 150deg Celsius? What are the potential sources of error in theis circuit and what might be done to improve any error that exists?

Essentially what you have here is an inverting amplifier. A picture of this is shown in pic1.jpg. I will refer to the labels in this picture throughout this answer.

The output voltage Vo from the amplifier is given by:

Vo=-(R2/R1)Vin

where Vin is the input voltage.

What the question is asking you to do is to find Vo (which is what the voltmeter would read) when the temperature is 150 degrees Celsius.

In your question:

Vin=1.5V
R2=2000ohm
R1=100+Rt ohm

And you know that at T=150, Rt=100+0.005*T=100.75

so ...

Solution Summary

Essentially what you have here is an inverting amplifier. A picture of this is shown in pic1.jpg. I will refer to the labels in this picture throughout this answer. The output voltage Vo from the amplifier is given by: Vo=-(R2/R1)Vin where Vin is the input voltage. What the question is asking you to do is to find Vo (which is what the voltmeter would read) when the temperature is 150 degrees Celsius.

3.
a) Explain what is meant by 'unconditional stability' in an op-amp.
b) Figure 2 gives the open-loop response of an uncompensated op-amp. Compensation is to be applied to the amplifier to make it unconditionally stable. Estimate the frequency at which the breakpoint of the compensated response must occur.
See attachme

1. Show that gain rolls-off at -6 dB/octave for a passive LP filter.
2. (a) Write down the expression for the frequency-dependent open-loop gain of an operationalamplifier. Sketch the magnitude of the open-loop gain of an operationalamplifier as a function of frequency. Explain what is meant by a `single-lag' response of an

A T-attenuator is required to be inserted between an amplifier and a transmission line. The power level to the line is required to be restricted to -3 dB. The gain of the amplifier is fixed at 24 dB and its maximum input signal is at a level of -10 dB.
Sketch a block diagram of the arrangement and calculate suitable values of

The solution covers in a detailed and explanatory manner the following topics:
- Op-amp ''golden rules'' as an introduction to op-amp circuits
- Differential amplifier structure with detailed graphical representation
- Derivation of the differential amplifier gain expression followed by the example of how to calculate t

Attached figure shows the circuit of a multistage amplifier. Identify the stages and describe the operation and principle features of the amplifier. You should also make an estimate of the maximum output current of the
amplifier.

Show how an ideal OperationalAmplifier with an open loop gain = A can be used to provide:
i) a non-inverting amplifier with gain= +6v/v.
ii) an inverting amplifier with gain= -3v/v.
iii) an integrator with gain= +3.
Explain the purpose of every component in your circuits.
Please see attached for full question.

FIGURE 4 shows an amplifier circuit. Write a short report on the operation and performance of the circuit. In completing the report you should:
- Explain the operation of the circuit and in particular the role of resistors R1 and R2.
- Build the circuit in PSpice and use it to determine:
(i) the quiescent value of Vout
(ii)

For the depletion-load amplifier, let W1=80microm, L1=4micrometers, W2=8 micrometers and L2=32 micrometers. If the body-effect parameter X=0.2, find the voltage gain neglecting the effect on ro.
a. -44.72 V/V
b. -45.6V/V
c. 44.72 V/V
d. 45.6 V/V

An audio amplifier has the following frequency response (transfer function):
At 20 Hz, gain = 30 dB.
At 60 Hz, gain = 37 dB.
At 120 Hz, gain = 40 dB.
At 10,000 Hz, gain = 40 dB.
At 12,000 Hz, gain = 37 dB.
At 16,000 Hz, gain = 30 dB.
The gain of the amplifier is constant from 120 Hz to 10 kHz at 40 dB.
a. Wh