Voltage-stabilizing circuit by adopting LCpi-type filter and using bridge rectifier circuit for rectifier

Abstract

The invention discloses a voltage-stabilizing circuit by adopting LCpi-type filter and using a bridge rectifier circuit for rectifier, which comprises the bridge rectifier circuit, a filter circuit and a voltage-stabilizing system with a controllable precise voltage-stabilizing function, wherein the bridge rectifier circuit is internally provided with a diode D2, a diode D3, a diode D4 and a diode D5; the filter circuit comprises a capacitor C3, a capacitor C4 and an inductor L, the first end of the capacitor C4 is connected with the negative electrode of the diode D3 and the first end of the inductor L, the second end of the capacitor C4 is connected with the positive electrode of the diode D2 and the second end of the capacitor C3, the second end of the inductor L is connected with the first end of the capacitor C3, and the capacitor C3 is in parallel connection with the input end of the voltage-stabilizing system. Deficiencies that when bridge rectifier is adopted in the prior art, a single capacitor is adopted for filter after rectifier output, ripple voltage is excessively large and too much, and the subsequent circuit is influenced are solved; and the LCpi-type filter is used for head filter processing after rectifier output, and the ripple factor can be effectively reduced.

Description

technical field [0001] The invention relates to the field of voltage stabilizing technology, in particular, it is a voltage stabilizing circuit rectified by a bridge rectifier circuit using LCπ type filter. Background technique [0002] A power supply is a device that provides power to electronic equipment, also known as a power supply, and a device that converts other forms of energy into electrical energy is called a power supply. Generators can convert mechanical energy into electrical energy, and dry batteries can convert chemical energy into electrical energy. Generators, dry batteries, etc. are called power sources. A device that converts alternating current into direct current through a transformer and a rectifier is called a rectified power supply. An electronic device that can provide a signal is called a signal source. The crystal triode can amplify the signal sent from the front, and then transmit the amplified signal to the circuit behind. The transistor can ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a voltage stabilizing circuit rectified by a bridge rectifier circuit using LCπ-type filtering to solve the problem of excessive ripple voltage and excessive influence when using a bridge rectifier in the prior art and using single-capacitor filtering after rectification output. The shortcomings of the follow-up circuit, using the LCπ-type filter to perform the first-stage filter processing after the rectified output, can effectively reduce the ripple coefficient, provide high-reliability voltage for the follow-up processing, and use the reference voltage regulator based on controllable precision Technically designed voltage stabilization system for voltage stabilization

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