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Draw the structure of an n-channel JFET with appropriate voltage bias and explain the process of pinch-off. Explain the various regions on the drain characteristic of this JFET for VDS > 0 and .
Why LC oscillators are preferred over RC oscillators to generate high frequencies? Why 2-stage amplifier is required in Wien bridge oscillator in contrast to a single stage amplifier in the phase shift oscillator?
IC 555 काल समंजक का उपयोग करके 20 kHz आवृत्ति का वर्ग तरंग जनित करने के लिए अस्थायी बहुकंपित्र डिज़ाइन करें।
raw the circuit of a Colpitts oscillator. Calculate its frequency of oscillation if value of both the capacitors is and inductor is
.
You want to amplify a triangular wave signal of amplitude and
frequency. Which characteristic of op-amp will be significant in this case? What is its minimum value?
Design a 2-channel op-amp based circuit to give following output relation:
The turns ratio of a transformer used in half wave rectifier is 30:1. The primary is connected to the power mains: . If the diode resistance in forward bias is
and the load resistance, RL is
, determine
i) the peak value, the dc value and the rms value of current;
ii) the ripple factor