channel length and u03ba is a scalar less than 1 e g 0 5 or 0 2 that defines the amount of hysteresis in the oscillator 100 for example a small value of u03ba provides less hysteresis than a large value of u03ba on the u201c n u201d side transistors m 8 and m 9 form a second differential pair current into the second differential pair is scaled by u03ba u03b2 contributed by transistor m 10 on the u201c p u201d side a second branch of the oscillator 100 includes transistors m 11 m 12 m 13 m 14 m 15 m 16 transistors m 12 and m 13 form a third differential pair current into the third differential pair is scaled by u03b2 contributed by transistor m 11 the sizing of transistor m 11 is relative to u03b2 set by the w l ratio of transistor m 1 on the u201c n u201d side transistors m 14 and m 15 form a fourth differential pair current into the fourth differential pair is scaled by u03b2 contributed by transistor m 16 thus the current into the third and fourth differential pairs is greater than the current into the first and second differential pairs due to the factor u03ba which is less than 1 an operational amplifier a has a capacitor c across its positive and negative inputs in some implementations the capacitor c operates as a 1 pole filter the size of v control u03b2.