Startup circuit and power supply system integrated with same
A technology for starting circuits and power supply voltages, applied in control/regulating systems, adjusting electrical variables, instruments, etc., which can solve the problems of increasing chip power consumption and area, reference voltage drift, and increasing chip area, so as to improve PSRR and reduce area. , the effect of reducing costs
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[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0012] The starting circuit of the present invention is as figure 1 As shown, it includes PMOS tubes MP1, MP2, MP3, MP4, MP5, NMOS tubes MN1, MN2, MN3, an inverter INV1, a capacitor unit, a resistor unit R1, and a voltage stabilizing unit. The specific connection relationship is as follows: NMOS tube MN2 The gate terminal of the inverter INV1 is connected to the input terminal of the inverter INV1 and used as the input terminal of the start-up circuit, and the output terminal of the inverter INV1 is connected to the gate terminal of the NMOS transistor MN1, the source terminals of the NMOS transistors MN1, MN2, and MN3 and the substrate The bottoms are all connected to the ground, the gate terminal of the PMOS transistor MP1, the drain terminal of the MOS transistor MP2, the drain terminal of the NMOS transistor MN2, the first terminal of the c...
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