MOSFET linear direct-current voltage-stabilizing output circuit

Abstract

The invention discloses an MOSFET linear direct-current voltage-stabilizing output circuit. The output circuit comprises a first capacitor, a second capacitor, a resistor, a voltage-stabilizing tube and an MOSFET, wherein the first capacitor is connected between the input end and the output end of the circuit; the second capacitor is connected between the first capacitor and the output end of the circuit; the resistor is connected with the voltage-stabilizing tube in series and then connected with the first capacitor in parallel; the MOSFET comprises a grid electrode, a source electrode and a drain electrode; the grid electrode of the MOSFET is connected with the output end of the circuit; the source electrode of the MOSFET is connected with the resistor and the voltage-stabilizing tube separately; and the drain electrode of the MOSFET is connected with the input end of the circuit. By adoption of the way, the MOSFET linear direct-current voltage-stabilizing output circuit has the advantages of wide operating voltage range, capability of reducing the occupied space of a PCB in design, and better device model selection, and the like.

Description

technical field [0001] The invention belongs to the technical field of circuits, and in particular relates to an output circuit of a MOSFET linear DC voltage regulator. Background technique [0002] At present, the traditional triode electronic filter circuit and LM7812 regulator chip used in the circuit have a relatively low input voltage. When the input voltage is higher than 30V, this circuit cannot be used any more. Contents of the invention [0003] The technical problem mainly solved by the present invention is to provide a MOSFET linear DC stabilized output circuit. While maintaining the original function, through various components, a wide voltage input is realized, and when the input voltage is higher than 30V, the circuit It can no longer be used, and it has the advantages of wide operating voltage range, reduced area occupied by PCB design, and better selection of devices. [0004] In order to solve the above-mentioned technical problems, a technical solution a...

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Problems solved by technology

[0003] The technical problem mainly solved by the present invention is to provide a MOSFET linear DC stabilized output circuit. While maintaining the original function, through various components, a wide voltage input is realized, and when the input voltage is higher than 30V, the circuit It can no longer be used. It has the advantages of wide operating voltage range, reduced area occupied by PCB design, and better selection of devices.

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