Linear voltage-stabilized power supply circuit

Abstract

The invention relates to a linear voltage stabilizing power circuit, which comprises a three-end adjustable parallel voltage stabilizer, an electronic switch, an output assembly, a first resistor, a third resistor, a fourth resistor and a fifth resistor, the anode of the three-end adjustable parallel voltage stabilizer is grounded while the cathode is connected with a power unit through the first resistor; the third resistor, the fourth resistor and the fifth resistor are connected with a reference voltage end of the three-end adjustable parallel voltage stabilizer, the other end of the third resistor is grounded through the electronic switch, the other end of the fourth resistor is grounded; the controlling end of the output assembly is connected with the cathode of the three-end adjustable parallel voltage stabilizer while the input end is connected with the power unit of the computer system and the output end is connected with the other end of the fifth resistor as the output end of the linear voltage stabilizing power circuit. The linear voltage stabilizing power circuit can output different voltages according to the different detected signals so as to meet the requirement of different loads, so that the cable laying space and required elements for host machine board can be saved.

Description

technical field [0001] The invention relates to a linear stabilized voltage power supply circuit. Background technique [0002] DDR II SDRAM (Double Data Rate II SDRAM, the second generation of double data rate synchronous dynamic random access memory) is a new generation of memory technology standards developed by JEDEC (Joint Flectron Device Engineering Council, Electronic Device Engineering Joint Committee), and the previous generation of memory Compared with DDR I SDRAM (Double Data Rate I SDRAM, the first generation of double data rate synchronous dynamic random access memory) standard, DDR II SDRAM has obvious advantages in pre-reading capability, delay, power consumption, heat generation, etc. . However, since the two memory interfaces and voltages are different, they cannot share the same memory slot. At present, in order to facilitate users to upgrade the memory, many motherboards integrate two kinds of memory slots, so that both DDR I SDRAM and DDR II SDRAM can b...

AI Technical Summary

Problems solved by technology

Due to the different operating voltages of the two types of memory, generally the two types of memory slots have their own independent power conversion modules. On the one hand, this solution uses more components, and on the other hand, it will take up additional PCB board space, resulting in the motherboard design. Increased difficulty and manufacturing costs

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