Winston Hsu
Ring oscillator having a stable output signal without influence of MOS devices
A ring oscillator having a stable output signal without influence of MOS devices is disclosed. The ring-oscillator has a bias circuit to drive a plurality of delay cells. The bias circuit has a first loading unit with a p-n junction, a second loading unit with a p-n junction, and a resistor electrically connected to the p-n junction of the second loading unit. The second loading unit and the resistor are positioned at a current path of a current mirror, and the first loading unit is positioned at another current path of the current mirror. The area of the p-n junction in the second loading unit is not equal to the area of the p-n junction in the first loading unit. The magnitudes of the current passing on the two current paths are only controlled by characteristics of the p-n junctions of the first and second loading units.
eMemory Technology Inc.
H H
H03K H03K
inventional inventional
Chien-Hung
Ho