Network signal output circuit

Abstract

The invention discloses a network signal output circuit. The network signal output circuit comprises a time-delay circuit, an amplifying circuit, a south bridge chip and a network chip, wherein the amplifying circuit is electrically connected with the time-delay circuit. The time-delay circuit receives a first direct current voltage signal and the time-delay circuit can output the first direct current voltage signal after the first direct current voltage signal is delayed. The amplifying circuit receives the first direct current voltage signal which is output delayed. The amplifying circuit can be converted into the output first direct current voltage signal which is delayed to a second direct current voltage signal so as to output to the south bridge chip. The south bridge chip outputs a network clock signal to drive the network chip after the south bridge chip receives the second direct current voltage signal.

Description

technical field [0001] The invention relates to a signal output circuit, in particular to a network signal output circuit in a computer system. Background technique [0002] The motherboard network card chip refers to the network card chip integrated in the motherboard that integrates network functions. The traditional computer motherboard amplifies the IMVP_PWRGD (central processing unit power supply is normal) signal and then outputs the PCH_PWROK (south bridge chip power supply is normal) signal to drive the south bridge. The chip outputs a 100MHZ network clock signal to the network card chip. The traditional PCH_PWROK signal is usually output too fast and the timing is ahead of other signals, so that the network card chip cannot normally receive the 100MHZ network clock signal when the computer system is powered on and self-tested, and the computer system cannot detect the network after it is turned on. Contents of the invention [0003] In view of the above, it is ne...

AI Technical Summary

Problems solved by technology

The traditional PCH_PWROK signal is usually output too fast and the timing is ahead of other signals, so that the network card chip cannot normally receive the 100MHZ network clock signal when the computer system is powered on and self-tested, and the computer system cannot detect the network after the computer system is turned on.

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