Crash-proof logic circuit and notebook computer

Abstract

The invention discloses a crash-proof logic circuit and a notebook computer. The crash-proof logic circuit comprises a charge chip, a first power supply module, a CPU (Central Processing Unit), a first resistor, a second resistor, a capacitor and a driving module, wherein a first end of the capacitor is connected with a first end of the first resistor and a signal output end of the charge chip respectively; a second end of the capacitor is connected with a first end of the second resistor and a signal input end of the driving module respectively; a signal output end of the driving module is connected with the input end of the CPU; the first power supply module is connected with a second end of the first resistor and a second end of the second resistor respectively; the charge chip is used for outputting indication signals when power is supplied power current is suddenly reduced; the capacitor is used for receiving the indication signals; the signal output end of the driving module is controlled according to the second resistor and the capacitor to output low-level signals firstly, then the frequency of the CPU is reduced, and high-level signals are further output. By adopting the crash-proof logic circuit, the notebook computer can be prevented from power off in high-speed operation or crash down if an adaptor is plugged out, and the service life of a battery is prolonged.

Description

technical field [0001] The invention relates to the field of computers, in particular to a logic circuit for preventing power failure and a notebook computer. Background technique [0002] With the diversification of the use of notebook computers, people have higher and higher requirements for the performance of notebook computers. When the notebook computer is running a high-power consumption program, the CPU of the notebook computer is in a full-load working state, the frequency is high, and the power consumption is relatively low. Large, if the adapter is unplugged or the power is suddenly cut off at this time, the battery of the notebook computer needs to be used to continue the power supply. In the prior art, the above process is generally realized through the EC (Embed Controller, embedded controller) in the notebook computer to receive and charge. The chip sends the signal that the adapter is unplugged. After internal processing according to the received signal, the l...

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Problems solved by technology

[0002] With the diversification of the use of notebook computers, people have higher and higher requirements for the performance of notebook computers. When the notebook computer is running a high-power consumption program, the CPU of the notebook computer is in a full-load working state, the frequency is high, and the power consumption is relatively low. Large, if the adapter is unplugged or the power is suddenly cut off at this time, the battery of the notebook computer needs to be used to continue the power supply. In the prior art, the above process is generally realized through the EC (Embed Controller, embedded controller) in the notebook computer to receive and charge. The chip sends the signal that the adapter is unplugged. After internal processing according to the received signal, the low-level signal is sent to the CPU to reduce the frequency of the CPU so that the laptop can continue to run the previous program through its battery power supply, but the EC It takes a certain amount of time to judge the current state, and the down-frequency signal cannot be sent to the CPU in time. At this time, the power consumption of the notebook computer is too large, which causes the battery discharge current of the notebook computer to be too large, so that the self-protection is turned on, and power failure occurs. , affecting user experience and reducing battery life

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