Power good signal output method and device
A signal output and signal technology, which is applied in the field of good power signal output methods and devices, can solve problems such as affecting the accuracy of power supply status judgment, affecting the overall performance of display driver chips, and protecting circuit misoperations, so as to solve competition and risk-taking problems. , the effect of eliminating burr phenomenon, zero power consumption static current
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Embodiment 1
[0064] FIG. 6(A) shows the circuit diagram of the power good signal output subunit of Embodiment 1 of the present invention, and FIG. 6(B) shows the effect diagram of the power good signal output subunit of Embodiment 1 of the present invention.
[0065] As shown in Figure 6 (A), the power good signal output subunit of the present invention includes a voltage divider module 121 with an enable switch 124, a forward judgment module 122 and a logic AND gate 123, wherein the input power supply voltage VDDN is Positive value means that the enable switch 124 is close to the high potential end, that is, the power supply voltage end (VDDN end).
[0066] Wherein, the voltage dividing module 121 converts the input power supply voltage VDDN into a detection divided voltage VDDN' that can be judged by resistive voltage division. Since the enable switch 124 is provided in the voltage divider module 121 in response to the enable signal EN, the static power consumption of the voltage divider...
Embodiment 2
[0075] FIG. 7(A) shows the circuit diagram of the power good signal output subunit of the second embodiment of the present invention, and FIG. 7(B) shows the effect diagram of the power good signal output subunit of the second embodiment of the present invention.
[0076] As shown in Figure 7 (A), the power good signal output subunit of the present invention includes a voltage divider module 221 with an enable switch 224, a reverse judgment module 222 and a logic AND gate 223, wherein the input power supply voltage VDDN is Positive value means that the enable switch 224 is close to the low potential end, that is, the ground end (GND end).
[0077] Wherein, the voltage dividing module 221 converts the input power supply voltage VDDN into a detection divided voltage VDDN' that can be judged by dividing the voltage by resistors. Since the voltage divider module 221 is provided with an enable switch 224 responsive to the enable signal EN, the static power consumption of the voltag...
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