Input control diode-based level-shift circuit

Abstract

The invention relates to an analog integrated circuit design and provides a novel topological structure based on an input control diode, in particular, an input control diode-based level-shift circuit. According to the structure, since the diode is adopted, the normal operation of the level shift circuit in the case of turning off source current can be ensured, and the standby power of a WCMLS (Wilson current mirror based level shifter) can be effectively reduced. The input control diode-based level-shift circuit of the invention is composed of N-type MOS devices from MN1 to MN4, P-type MOS devices from MP1 and MP2, a diode Di, a low-voltage inverter, and two high-voltage inverters; the source ends of MP1 and MP2 are connected with VDDH, and the gate ends of the MP1 and MP2 are connected together with the drain end of MN1, and therefore, a current source structure is formed; the source end of MN1 is connected with the drain end of MN3, and the source end of MN3 is grounded; and the drain end of MN1 is also connected with the upper end of the diode Di, the lower end of the diode is connected with the drain end of MN4, and the source end of MN4 is grounded. The input control diode-based level-shift circuit of the invention is mainly applied to the analog integrated circuit design and manufacturing field.

Description

technical field [0001] The invention relates to the field of analog integrated circuit design, especially the field of complex SOC equipment. Specifically, it relates to a level-shifting circuit based on an input-controlled diode. Background technique [0002] In wireless sensor networks, as the systems on chips (SOCs) used in the fields of micro-health care equipment and environmental monitoring systems become more and more complex, if the entire system uses high-voltage circuits, the power consumption will be too large, and low-voltage circuits will consume too much power. The speed of the circuit is difficult to meet the performance requirements. The best solution is to provide different voltages in different modules, the high-speed circuit provides high voltage, and the low-speed circuit provides low voltage. Therefore, it is of great significance to propose a level shifter (level shifter, LS) circuit. [0003] There are currently two mainstream level-shifting circuit...

AI Technical Summary

Problems solved by technology

However, after the source current of this structure is cut off, the voltage at node B will rise, and the high gate voltage of MP2 will greatly reduce the current flowing through MP2, resulting in a drop in the voltage at node A.

Although the voltage drop can increase the source current through feedback control, the current increase is small enough to pull the voltage at node A back to V DDH , eventually stabilizes below V DDH voltage, which will increase the quiescent current and standby power of the inverter behind

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