Single power electric level shift circuit with digital filtering function

Abstract

The invention discloses a single power electric level shift circuit with a digital filtering function. The single power electric level shift circuit with the digital filtering function mainly resolves the problems that an existing electric level shift circuit is too large in static power consumption, fluctuating in output voltage and difficult in multi-power-signal transmission. The electric level shift circuit comprises source drain interchange circuits (1), a single power supply circuit (2), a schmitt trigger (3), an electric level shifter (4) and a digital filter (5). The source drain interchange circuits (1) output voltage signal V1 and are respectively connected on the schmitt trigger (3) and the electric level shifter (4). The single power supply circuit (2) provides voltage control signal V4 for the schmitt trigger (3). The schmitt trigger (3) provides voltage control signal V2 for the electric level shifter (4). The electric level shifter (4) provides voltage signal V3 for the digital filter (5). The digital filter (5) outputs voltage signal V OUT. According to the single power electric level shift circuit with the digital filtering function, the stability of output voltage is improved, the static power consumption is reduced, the accuracy of electric level transformation is improved and sharp plus interference waves are removed by filtering. The single power electric level shift circuit with the digital filtering function can be used for an analogue integrated circuit.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, in particular to a single power supply level shift circuit with digital filtering function, which can be used for analog integrated circuits. Background technique [0002] With the rise of smart phones, proximity detection and light detection sensor chips have become a current research hotspot. In order to enhance its versatility, these sensor chips are compatible with I 2 C protocol, usually the operating voltage range of the chip is 2.15V ~ 3.6V, I 2 The operating voltage range of the C interface is 1.7V ~ 3.6V, and the level shift circuit becomes one of the indispensable modules. [0003] In the multi-chip system design, the power supply voltage between the chips is different, the required power line is too long, and the blockage between the signals is serious, so the level shift circuit becomes one of the indispensable modules. [0004] figure 1 The traditional level shift cir...

AI Technical Summary

Problems solved by technology

[0005] The above dual power supply level shift circuit increases the static power consumption, increases the design complexity and cost of the chip, makes signal transmission difficult, and the output voltage fluctuates

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