Switching circuit for power supply
A power switching and circuit technology, applied in logic circuits, electrical components, pulse technology, etc., can solve problems such as increased power consumption, and achieve the effect of avoiding instantaneous current and reducing power consumption
Active Publication Date: 2011-09-14
MACRONIX INT CO LTD
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In other words, at this time, the transient current (Transient Current) will flow through the pull-up transistor MPU and the pull-down transistor MPD, resulting in increased power consumption of the conventional power switching circuit 10
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[0061] Please refer to image 3 , image 3 It is a block diagram of a power switching circuit according to a preferred embodiment of the present invention. The power switching circuit 30 includes a level shifter 310 (Level Shift, or translated as a level shifter), an output circuit 320 , a first inverter 330 and a second inverter 340 . The level shifter 310 outputs the first output signal N4 to the inverter 330 according to the control signal V_SEL, and outputs the second output signal N5 to the inverter 340 according to the control signal V_SEL.
[0062] The first inverter 330 and the second inverter 340 may generally be complementary metal-oxide-semiconductor (CMOS) inverters. The first inverter 330 and the second inverter 340 respectively receive the first output signal N4 and the second output signal N5, and invert the first output signal N4 and the second output signal N5 to output non-overlapping ( The first inverted output signal N6 and the second inverted output sig...
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The invention discloses a supply switch circuit, comprising a level translator, a first inverter, a second inverter and a output circuit, wherein the level translator outputs a first output signal and a second signal according to a control signal. The first inverter outputs a first inverted output signal according to the first output signal, and the second inverter outputs a second inverted output signal according to the second output signal. The first inverted output signal and the second inverted output signal do not overlap each other. The output circuit selectively outputs a first level or a second voltage level according to the first inverted output signal and the second inverted output signal. According to the invention, due to the level translator coupled to the output circuit through the first inverter and the second inverter, the first inverted output signal and the second inverted output signal of the output circuit which are not overlapped are provided, thereby avoiding thegeneration of the instantaneous current, and reducing the power consumption of the supply switch circuit.
Description
technical field [0001] The invention relates to a power switching circuit, and in particular to a power switching circuit which reduces instantaneous current and power consumption. Background technique [0002] Please refer to figure 1 , figure 1 For traditional power switching circuits. The conventional power switching circuit 10 includes a level shifter (Level Shift, or translated as a level shifter) 110 and an output circuit 120 . The level shifter 110 outputs the output signal N0 and the output signal N1 according to the control signal VSS_SEL, and the output circuit 120 determines its output voltage to be equal to the voltage level NVSS or the voltage level GND according to the output signal N0 and the output signal N1. [0003] Furthermore, the level shifter 110 further includes a P-type transistor ML0 , a P-type transistor ML1 , an N-type transistor ML2 , an N-type transistor ML3 and an inverter IL0 . The control terminal of the P-type transistor ML0 is coupled to...
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IPC IPC(8): H03K19/00
Inventor 许哲豪梁甫年
Owner MACRONIX INT CO LTD