Alternative Circuits for Low Threshold Voltage Diodes

Abstract

The invention discloses a substitution circuit of a low-threshold voltage diode. The substitution circuit comprises an input voltage detection circuit (100), an output voltage control circuit (200) and an output voltage switch circuit (300). The input voltage detection circuit (100) is used for detecting input voltage of the input end (IN), reducing the input voltage to form first input voltage and outputting the first input voltage to the output voltage control circuit (200). The output voltage control circuit (200) is used for performing inverted output of the first input voltage to form switch control voltage, controlling the voltage and opening and closing of the output voltage switch circuit (300) through a switch. When the output voltage switch circuit (300) is opened, voltage drop between the input end (IN) and the output end (OUT) is close to zero. When the output voltage switch circuit (300) is closed, reverse leakage current is zero. The defect that the low-threshold voltage diode with small voltage drop at the positive output end during breakover cannot be provided inside a silicon material chip in the prior art is overcome.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to an alternative circuit under the condition that the integrated circuit technology cannot provide low threshold voltage diodes. Background technique [0002] Low-threshold voltage diodes are mostly used in battery charging and discharging circuits and power supply circuits that require a lower conduction voltage drop, especially when the power supply voltage is low. Due to the high threshold voltage of ordinary diodes, the power supply voltage output through the diode becomes lower, so low-threshold voltage diodes are critical. [0003] The output voltage of low-threshold voltage diodes decreases less than that of ordinary diodes, and usually higher power supply voltages can be obtained; in addition, in some special applications, the power supply voltage is relatively low, and the chip is more sensitive to the power supply voltage. It is hoped that the power supply voltage will ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a low-threshold voltage diode with a low voltage drop at the positive output end when the silicon material chip is turned on, aiming at the above-mentioned defects in the prior art that cannot provide a low-threshold voltage diode inside the silicon material chip. alternative circuit

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