pthoppay
Member level 4
long ring oscillators td delay
Hi,
I am trying to design a basic differtial ring oscillator for a fixed frequency. As i read from the text books the frequency of oscillation is (1/2*n*td), where td is the delay per unit cell.
I was simulating the ring oscillator in spectre but the oscillation frequency is different from the formula, i would have not bothered if the frequency difference is small. But there is a 2 to 3 factor difference. I wasnt able to reson it out the huge difference. Have any people experienced such issues, if so, please help me to resolve it.
Thanks in adavnce,
Prakash.
Hi,
I am trying to design a basic differtial ring oscillator for a fixed frequency. As i read from the text books the frequency of oscillation is (1/2*n*td), where td is the delay per unit cell.
I was simulating the ring oscillator in spectre but the oscillation frequency is different from the formula, i would have not bothered if the frequency difference is small. But there is a 2 to 3 factor difference. I wasnt able to reson it out the huge difference. Have any people experienced such issues, if so, please help me to resolve it.
Thanks in adavnce,
Prakash.