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 a delay chain of the ring oscillator. The second and third transistors form a pseudo pass-gate inverter. An input of the pseudo pass-gate inverter is configured to receive an output signal of the delay chain. The first and fourth transistors are controlled by a realignment signal. When the realignment signal is in a realignment state, the first transistor is turned off and the fourth transistor is turned on, and when the realignment signal is in a normal state, the first transistor is turned on and the fourth transistor is turned off.
TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD
H
H03K
inventional
Tsung-Hsien Cheng-Hsiang Ruey-Bin Chih-Hsien
Tsai Hsieh Sheen Chang