Novel power amplification logic control system based on constant-current circuit
A constant current circuit and power amplification technology, applied in the field of logic control systems, can solve problems such as fluctuations and output current instability, and achieve the effects of avoiding damage, ensuring stability, and simple overall structure
Inactive Publication Date: 2015-09-02
CHENGDU CHUANGTU TECH
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the defect that the output current of the current logic control system is not stable when the power grid fluctuates, and to provide a new type of power amplification logic control system based on a constant current circuit
Method used
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[0018] Such as figure 1 As shown, the present invention is composed of a switching power amplifying circuit and a logic amplifying circuit connected to the switching power amplifying circuit. In order to achieve the purpose of the present invention, a constant stream circuit.
[0019] Among them, the constant current circuit consists of operational amplifier P5, operational amplifier P6, field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3, transistor Q4, transistor Q5, resistor R17, resistor R18, resistor R19, resistor R20, resistor R21, Composed of diode D4, polar capacitor C8 and polar capacitor C9.
[0020] When connected, one end of the resistor R18 is connected to the drain of the field effect transistor MOS1, and the other end is grounded, and the P pole of the diode D4 is connected to the source of the field effect transistor MOS1, and its N pole passes through the resistor R17 and the resistor in sequence. R19 is connected to the ...
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The invention discloses a novel power amplification type logic control system. The novel power amplification type logic control system is characterized by mainly comprising a switching power amplification circuit and a logic amplification circuit connected with the switching power amplification circuit, and the logic amplification circuit comprises a power amplifier P4, a NAND gate IC1, a NAND gate IC2, a NAND gate IC3, a NAND gate IC4, a resistor R11 and the like, wherein one end of the resistor R11 is connected with the in-phase end of the power amplifier P4 while the other end of the resistor R11 is connected with the output end of the NAND gate IC4 after passing by a diode D3 and a resistor R16 sequentially. By taking full advantage of stability of the switching power amplification circuit, the novel power amplification type logic control system is capable of ensuring stability of logic control signals and can be applicable to different occasions and environments.
Description
technical field [0001] The invention relates to a logic control system, in particular to a novel power amplification logic control system based on a constant current circuit. Background technique [0002] At present, due to the characteristics of low energy consumption, long service life, safety and environmental protection, LED lamps have become one of the mainstream products for people's living lighting. Since LED lamps are different from traditional incandescent lamps, they need to be driven by a dedicated drive circuit, so there are various protection systems on the market to prevent the drive system from being interfered by internal or external adverse factors. [0003] The logic control circuit is an important control part of the LED lamp protection system, and its running speed and performance stability directly determine the use range and performance of the LED lamp protection system. However, at present, when the power grid fluctuates, the output current of these l...
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IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 周云扬
Owner CHENGDU CHUANGTU TECH