72 408
Assignments Done
98,8%
Successfully Done
In April 2019

# Answer to Question #85272 in Electric Circuits for Anand

Question #85272
Draw the circuit of phase shift oscillator using n-p-n transistor. Explain how
positive feedback is achieved in this circuit.

Here is the phase-shift oscillator circuit with NPN transistor:

The positive feedback is provided by the RC phase-shift network. In the example above each $C_nR_n$network shifts the phase angle between each successive RC section by an angle of approx. 60°, thus making total phase shift 3x60°=180°.

60° is a result of choosing appropriate capacitor and resistor to achieve

$\phi=\text{tan}^{-1}\frac{1}{2\pi fC_nR_n}=60^\circ.$

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Assignment Expert
16.04.19, 17:11

Dear Nitin,