Linear voltage-stabilizing device
A technology of linear voltage regulator and linear voltage regulator, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of increasing cost, increasing chip area and power consumption, occupying a large area, etc., and achieving reduction Effects of performance degradation, reduction in chip area and power consumption
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Embodiment 1
[0047] Example 1, such as figure 2 As shown, the degenerate state detection circuit 4 is used to detect the degenerate state in the circuit of the reference voltage source 3, if the degenerate state is not detected, the circuit will close the PMOS transistor 24 through the amplifier 22, and the circuit works normally; when the degenerate state When the detection circuit 4 detects that the output of the reference voltage source 3 circuit is low, the output polarity of the amplifier 22 is reversed, and the degenerate state detection circuit 4 turns on the PMOS transistor 24. At this time, the battery 1 is connected to the input terminal M of the reference voltage source 3. After charging, the voltage of the reference voltage source 3 gradually increases, and the reference voltage source 3 enters a normal working state. At the same time, the degenerate state detection circuit 4 is turned off and the PMOS tube 24 is controlled to be closed, and the circuit enters a normal working ...
Embodiment 2
[0048] Example 2, such as image 3 As shown, the two amplifiers 21 and 22 in Embodiment 1 are combined into one amplifier 25 . When the reference voltage source 3 is in a normal state, the amplifier 25 is used to amplify the difference between the feedback voltage point and the output reference voltage of the reference voltage source 3, and control the opening and closing of the PMOS tube 26 according to the difference; and in the reference voltage source When 3 is the degenerate state, the amplifier 25 is used to eliminate the degenerate state, amplify the degenerate state detection signal and control the PMOS transistor 27 to charge the output node of the linear voltage regulator 2 until the degenerate state is completely eliminated.
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