RC Phase Oscillator

Thread Starter

blin

Joined Jan 9, 2012
1
Hi guys
i am stuck on this assignment.
the question is the following:

Design an RC phase oscillator and use operational amplifiers to condition the output
signal of the oscillator to produce concurrent sine and cosine waveforms.
The output voltage is also to be made variable from ±1V to ±5V. You will each be given a
fixed oscillator frequency
a frequency of 200Hz has been given but i dont know where to go from here.
please someone help because i am stuck nd dont know where to go from here.
ive designed oscilliator using formula 1 over 2x pi x R x C x square root of 6
i have uploaded my design please get back ASAP
 

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PaulEE

Joined Dec 23, 2011
423
Hi guys
i am stuck on this assignment.
the question is the following:

Design an RC phase oscillator and use operational amplifiers to condition the output
signal of the oscillator to produce concurrent sine and cosine waveforms.
The output voltage is also to be made variable from ±1V to ±5V. You will each be given a
fixed oscillator frequency
a frequency of 200Hz has been given but i dont know where to go from here.
please someone help because i am stuck nd dont know where to go from here.
ive designed oscilliator using formula 1 over 2x pi x R x C x square root of 6
i have uploaded my design please get back ASAP

http://en.wikipedia.org/wiki/Phase-shift_oscillator
 

Adjuster

Joined Dec 26, 2010
2,147
Your output amplifier uses an inverting configuration with quite a low input resistance. This may complicate the design of your feedback network due to loading effects.

Perhaps you should consider increasing the resistor, or changing to a non-inverting configuration.
 
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