Positive and negative voltage output power module with voltage stabilizing function

A positive and negative voltage, output power technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the problems of high output ripple voltage, large interference, large power consumption, etc., to achieve high output voltage regulation accuracy, overall The effect of low cost and few components

Pending Publication Date: 2017-08-29
ANHUI NORMAL UNIV
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Problems solved by technology

[0002] Positive and negative output power modules are widely used. At present, the positive and negative power supply adopts single-ended input and double-ended output. The output ripple voltage is high and the interference is large. It cannot be applied to equipment that is sensitive to ripple interference, and the volume is relatively large and the output efficiency is low. , higher power consumption

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  • Positive and negative voltage output power module with voltage stabilizing function

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Embodiment Construction

[0019] The technical problem to be solved by the present invention is to realize a positive and negative voltage output power supply module with voltage stabilizing function. Including input voltage divider circuit, operational amplifier voltage regulator circuit, positive and negative voltage control output circuit, under the condition that the voltage can be separated into two symmetrical positive and negative power supplies, the accuracy of voltage regulation is guaranteed as much as possible, and the system structure is simple and low cost is achieved.

[0020] see figure 1 It can be seen that the module includes a series step-down module composed of capacitor C1 and resistors R1 and R2. Through the voltage divider composed of resistors R3, R4, R5, R6 and capacitor C2, the voltage entering the dual operational amplifier LM358 and the potential of the voltage dividing point Strictly equal, the voltage dividing point is connected to the operational amplifier LN1 (+), the vol...

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Abstract

The technical purpose of the invention is to provide a positive and negative voltage output power module with the voltage stabilizing function. The module includes an input voltage divider circuit, an operation amplifying voltage stabilizing circuit and a positive and negative voltage control output circuit. A power supply Vin achieves the voltage stabilizing function through a resistor and is connected with the operational amplifier non-inverting input terminal through symmetrical series-connection resistor voltage divider circuits, according to the working characteristics of a double-operation amplifier LM358, voltage-stabilizing amplifying is conducted, the double-power-supply working environment is converted through a single supply power, and capacitor filtering of the non-inverting input terminal achieves symmetrical bipolar positive and negative voltages. On the premise that the voltage is divided into two groups of symmetrical positive and negative voltages, the voltage stabilizing accuracy is ensured as much as possible. Meanwhile, the module is simple in system structure and low in cost, positive and negative double voltage output is input to a direct-current power supply single terminal, and the problem that most applications need a device using positive and negative power supplies for supply power is solved.

Description

technical field [0001] The invention relates to the field of a power supply, in particular to the field of a positive and negative voltage output power supply circuit with a voltage stabilizing function. Background technique [0002] Positive and negative output power modules are widely used. At present, the positive and negative power supply adopts single-ended input and double-ended output. The output ripple voltage is high and the interference is large. It cannot be applied to equipment that is sensitive to ripple interference, and the volume is relatively large and the output efficiency is low. , Larger power consumption. [0003] Operational amplifiers are widely used in our lives, and have strong common-mode rejection capability, high gain, and low input impedance. Therefore, using it as an amplification link can greatly improve various technical indicators of the regulated power supply. Through the improvement of the circuit, a single power supply operational amplifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 周正仙帅文洁汪玲洪慧慧撒骄杨张诗语邹翔王林陈强
Owner ANHUI NORMAL UNIV
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