CMOS chip power supply
A power supply device, chip technology, applied in the direction of circuit devices, battery circuit devices, measuring devices, etc., can solve problems such as errors, slow operation speed, and low computer service life, so as to slow down the consumption of voltage, prolong life, and simple structure Effect
Inactive Publication Date: 2009-07-01
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
View PDF0 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] As we all know, the CMOS chip in the computer is a readable and writable RAM chip on the computer motherboard. It is mainly used to save the hardware configuration of the current system and the settings of certain parameters by the operator. The CMOS chip is powered by the system power supply when it is turned on. When shutting down, the system is powered by a backup battery, that is, a CMOS battery. Therefore, no matter in the shutdown state or when the system is powered off, the CMOS information will not be lost. The total voltage of the CMOS battery is 3V, and it is in the circuit. It cannot be recharged, so the voltage of the CMOS battery will continue to decrease over time. When the voltage is consumed to be insufficient to supply power to the CMOS information storage circuit, the computer will have a series of problems such as information errors of certain parameters, or slow operation. Usually, the service life of CMOS battery is one to two years, which is far less than the service life of the computer. Therefore, the CMOS battery needs to be replaced frequently to ensure that the setting information of the computer can be preserved.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0008] Please refer to figure 1 , The CMOS chip power supply device of the present invention includes a voltage stabilizing circuit 10 , a power supply circuit 20 , a diode D1 and a control switch 30 .
[0009] The voltage stabilizing circuit 10 includes an adjustable shunt reference source T of model TL431, two voltage divider resistors R1, R2 and a current limiting resistor R3, and one end connected to the voltage divider resistors R1, R2 is connected to the adjustable shunt The reference terminal of the reference source T and the other ends of the voltage dividing resistors R1 and R2 are respectively connected to the cathode and anode of the adjustable shunt reference source T, and the cathode of the adjustable shunt reference source T is connected to the A 5V system power supply is connected to the anode of the diode D1, and the anode of the adjustable shunt reference source T is grounded.
[0010] The power supply circuit 20 includes current-limiting resistors R4, R5 and...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A CMOS chip power supply device comprises a voltage stabilizing circuit, a capacitance, a control switch and a first diode, wherein an input end of the voltage stabilizing circuit is used to connect with a system power supply of a computer, an anode of the first diode is connected with an output end of the voltage stabilizing circuit, one end of the capacitance is connected with a cathode of the first diode and a first input end of the control switch, an output end of the control switch is used to connect to a CMOS chip of the computer, and the other end of the capacitance is earthed. When the computer is started, the system power supply generates a charging voltage through the voltage stabilizing circuit and the first diode to charge the capacitance, when the computer is power off, the capacitance discharges through the control switch to supply power for the CMOS chip. The CMOS chip power supply device has simple structure and relatively low cost.
Description
technical field [0001] The invention relates to a power supply device, in particular to a power supply device for a CMOS chip. Background technique [0002] As we all know, the CMOS chip in the computer is a readable and writable RAM chip on the computer motherboard. It is mainly used to save the hardware configuration of the current system and the settings of certain parameters by the operator. The CMOS chip is powered by the system power supply when it is turned on. When shutting down, the system is powered by a backup battery, that is, a CMOS battery. Therefore, no matter in the shutdown state or when the system is powered off, the CMOS information will not be lost. The total voltage of the CMOS battery is 3V, and it is in the circuit. It cannot be recharged, so the voltage of the CMOS battery will continue to decrease over time. When the voltage is consumed to be insufficient to supply power to the CMOS information storage circuit, the computer will have a series of prob...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/26H02J9/00H02J15/00H02J7/00
Inventor 魏刚
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD