Mediatek Corporation

Mediatek Singapore Pte. Ltd.

Heng-Meng Liu

Yipin Wu

Yi-Feng Chen

Tsung-Ying Tsai

Sung-Yun Hsueh

Kok-Tiong Tee

A tunable delay circuit includes a first multiplexer, a delay chain, and a second multiplexer. The first multiplexer selects an input signal or a feedback signal as a first output signal according to an enable signal. The delay chain delays the first output signal for different time periods so as to generate a plurality of delay signals. One of the delay signals is used as the feedback signal. The second multiplexer selects one of the delay signals as a second output signal according to a pass signal.

Tunable delay circuit and operating method thereof

A method for providing an on-chip variation determination and an integrated circuit utilizing the same are provided. The method includes: outputting, by a launch register circuit, a test data to the capture register circuit according to the first clock; receiving, by a capture register circuit, the test data from the launch register circuit according to the second clock; adjusting, by a control circuit, a first number of a first chain of delay elements to generate the first clock and a second number of a second chain of delay elements for the capture register circuit to just capture the test data to generate the second clock; and determining, by the control circuit, a path delay between the launch register circuit and the capture register circuit based on the first number of the first chain of delay elements and the second number of the second chain of delay elements.

Method for providing an on-chip variation determination and integrated circuit utilizing the same

A signal generator includes a main ring oscillator and a first ring oscillator. The main ring oscillator is supplied by a power voltage, and is configured to generate an output oscillation signal. The main ring oscillator is coupled through a power mesh to the power voltage. The first ring oscillator is supplied by the power voltage. The first ring oscillator is similar or identical to the main ring oscillator. The first ring oscillator is coupled through the power mesh to the power voltage. The first ring oscillator is used to calibrate a frequency of the output oscillation signal.

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Jhubei, Taiwan

Heng-Meng Liu