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Q. Why positive feedback is used in oscillator?
The main application of positive feedback is in oscillators. An oscillator generates AC output signal without any input AC signal. A part of the output is fed back to the input and this feedback signal is the only input to the internal amplifier. This signal is amplified again and again to produce oscillations. In positive feedback the feedback voltage is in same polarity with the input signal. And this positive signal is amplified to produce oscillations. Thus positive feedback is used in an oscillator to increase the gain. The case of negative feedback the feedback voltage is in opposite polarity with the input signal. This is amplified to produce growing oscillation. Thus the gain will decrease.
Q. A Silicon Transistor Whose Common Emitter Output Characteristics Are Shown In Dig Is Used In The Circuit With V cc =22.5v, R c =5.6k, R e =1k, R 2 =10k, And R 1 =90
Q. Show Maximum Differential Input Voltage of amplifier? This is the maximum value of differential input voltage v p - v n that can be applied without damaging the op amp.
Three transformers are provided with the following rating values: 1) 2400/240 V, 55kVA, Req1 = (0.1 + 0.0Y) Ohm and Xeq1 = (0.15 + 0.XX) Ohm. 2) 240/120 V, 25kVA, Req1 = (0.1
Q. With a suitable block circuit, show how linear sweep voltage is generated ? The above figure shows a basic sweep waveform generator. The switching action of the switch
Q. Consider the dual-slope A/D converter of Figure. (a) Calculate the total charge on the integrator due to the input voltage Vin during the signal integration time T. (b) Ob
Hey Dear i have a hw in MATLAB by applying Finite Element Method there(Electromagnetic) and i need your help with it. please take alook at the question and let me know if you can h
What is the use of 8251 chip? 8251 chip is mostly used as the asynchronous serial interface among the processor and the external equipment.
When you have a three phase short circuit of power cables laid in a trefoil formation they repel apart very dramatically. Why is this and what is happening?
Q. Show Proper cash management? Proper cash management: cash management is a important task of finance management he has to access to various cash needs at the difference time
explanation
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