McClure, Qualey & Rodack, LLP
Ring oscillator, controlling circuit and methods for realignment
A controlling circuit for ring oscillator is provided. First and second transistors of a first conductive type are coupled in series and between a node and a first power source. Third and fourth transistors of a second conductive type are coupled in parallel and between the node and a second power source. The node is coupled to an input of a delay chain of the ring oscillator. The second and third transistors are coupled in series and gates of the second and third transistors are configured to receive an output signal of the delay chain. When the first transistor is turned off and the fourth transistor is turned on, the node is pulled to a first logic level from a second logic level in order to align a phase of a waveform of the ring oscillator.
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
H
H03K
inventional
Cheng-Hsiang Ruey-Bin Chih-Hsien Tsung-Hsien
Hsieh Sheen Chang Tsai