Self-calibration circuit with built-in clock

Abstract

The invention provides a self-calibration circuit with built-in clock, which includes a timing management circuit, a clock generator and a self-calibration unit. The clock generator is used to generate and output a clock signal to the self-calibration unit through its output. The self-calibration unit completes the self-calibration based on the clock signal sent by the clock generator, and issues an effective self-calibration lock signal after the self-calibration is completed. The input end of the sequence management circuit is connected with the enable signal, and the output end thereof is connected with the enable end of the clock generator. When the enable signal jumps from the invalid level to the valid level, the clock control signal output by the timing management circuit jumps from the invalid level to the valid level; when the enable signal jumps from the valid level to the invalid level, the timing The active level of the clock control signal output by the management circuit jumps to an inactive level after several clock cycles. In this way, the problem of generating logic errors due to premature shutdown of the clock signal can be solved.

Description

【Technical field】 [0001] The invention relates to the technical field of circuit design, in particular to a self-calibration circuit with a built-in clock. 【Background technique】 [0002] During the working process of the self-calibration circuit, the clock is generally provided by the outside of the system, but in order to reduce the complexity of the system design, the built-in clock technology has gradually become the mainstream, but the built-in clock also has a disadvantage: when the system is turned off, the clock signal is also closed at the same time. Therefore, some circuit modules may not be able to send out signals in time, resulting in logic errors. [0003] Therefore, it is necessary to provide an improved technical solution to solve the above problems. 【Content of invention】 [0004] The purpose of the present invention is to provide a self-calibration circuit with a built-in clock, which can delay the clock signal to be turned off by several cycles after t...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a self-calibration circuit with a built-in clock, which can delay the clock signal for several cycles to turn off after the self-calibration is completed, thereby solving the problem of logic errors caused by prematurely turning off the clock signal

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