Circuit and method for generating negative pulse signal

Abstract

The invention discloses a circuit and a method for generating a negative pulse signal. The circuit comprises a conversion circuit, an adjusting circuit and an inverting circuit, wherein the conversion circuit is used for converting an input rising edge signal into a positive pulse signal; the adjusting circuit is connected with the conversion circuit, and used for adjusting the generated positive pulse signal and outputting a positive pulse signal with a preset pulse width; and the inverting circuit is connected with the adjusting circuit, and used for inverting the adjusted positive pulse signal and converting the inverted positive pulse signal into the negative pulse signal. The circuit and the method provided by the invention are low in cost. The rising edge signal can be converted into the negative pulse signal based on hardware. Moreover, appropriate resistance and capacitance values are selected, so that the pulse width of the generated negative pulse signal can be adjusted.

Description

technical field [0001] The invention relates to the technical field of computer hardware, in particular to a circuit and method for generating negative pulse signals. Background technique [0002] In the field of computer server hardware design, monitoring chips, timing control chips and even some chips with special functions need to sample signals and make further functional outputs based on the sampled signals. For example, when the power button is pressed, it will trigger a negative pulse signal to the timing control chip, and the timing control chip will notify the processor after receiving it, thereby triggering a series of system power-on controls. For different chips, the required signal types are different. Generally, there are four kinds of signals: negative pulse signal, positive pulse signal, falling edge signal, rising edge signal, as attached Figure 1-4 The waveform diagrams of negative pulse signal, positive pulse signal, falling edge signal and rising edge s...

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Problems solved by technology

[0003] In the prior art, the generation of negative pulse signals usually requires expensive professional processing chips, such as CPLD

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