Delay stage for voltage-controlled ring oscillator, has predetermined number of delay branches connected parallel to each other to provide different frequency ranges based on amount of parallely connected delay branches

摘要

The delay stage (10) has a set of delay branches (20A, 20B), and a controllable circuit device (27) to attach a predetermined amount of delay branches to a voltage supply. The predetermined number of delay branches is connected parallel to each other to provide different frequency ranges based on the amount of parallely connected delay branches. An output terminal (14) provides output signals which exhibit an output frequency adjusted by the controllable circuit device. An independent claim is also included for a method for operating a delay stage of a semiconductor device.