A new multiple-probe method is presented for simulation of highly nonlinear ring oscillators using the harmonic balance method. This method is robust and efficient compared to the single-probe method and readily converges for a wide range of single-ended and differential ring oscillators with identical or mismatched delay cells.
['Xiaochun Duan', 'Kartikeya Mayaram']
A multiple-probe approach for robust frequency domain ring oscillator simulation