Level conversion circuit

~胖球

Level conversion circuit [Copy link]

How should I interpret the circuit here? The gate and drain are shorted together. Since the I/O port of the microcontroller can only withstand 0 to 5 V, the output signal needs to be pulled to
12 V so that it can be recognized by the ECU.

chunyang

What is the input signal of V1 in?

chunyang

This level conversion circuit can be realized only by Q1. The introduction of MOS tube is inexplicable. It is necessary to first explain the level of V1 in and the expected function.

threetigher

The conclusion is simple: the picture is wrong.

~胖球

chunyang posted on 2020-3-23 10:27 What is the input signal of V1 in?

It is derived from the UART interface of the microcontroller

~胖球

threetigher posted on 2020-3-23 10:41 The conclusion is simple, the picture is wrong

What kind of picture should it be?

chunyang

~ Fat Ball posted on 2020-3-23 14:53 It is derived from the UART interface of the microcontroller

Then it can be concluded that the circuit is wrong and level conversion cannot be achieved at all.

threetigher

~ Fat Ball posted on 2020-3-23 14:54 What kind of picture should it be

The level of the person who copied the picture is not up to par.