1.
(a) Sometimes we do not want a linear response from an op amp circuit. For example, what if we want the output voltage to represent the natural logarithm of the input voltage? What can we do for a feedback element to accomplish this? Draw the schematic diagram and explain.
(b) Why is it necessary to connect operational amplifiers so that they invert the output signal even as they add input signals together?
(d) One of the non-linear behaviors that is sometimes required in analog circuits is rectification. Explain the meaning of it?
(e) One common requirement in electronic is to convert signals back and forth between analog and digital. Give an example of a Digital to Analog Conversion circuit diagram hence explain the diagram.
(f) One type of signal that is in frequent demand is the sine wave. We could use an op amp in place of a transistor as the gain element in a Wien Bridge oscillator or a Twin-T oscillator, but they have a problem with requiring multiple capacitors and resistors in some odd configurations for setting the frequency of oscillation. Can we do something with analog integrators and inverters to obtain the same result?
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