Beranda > level shifter > Level Shifter

Level Shifter

A common engineering task is to convert a positive to negative signal into a range suitable for a single supply ADC.  This circuit will convert a +/-5V signal into a 0 to 3.3V signal so that it can be sampled by an ADC on a 3.3V  microprocessor.


A = (R4/R1) x (R1+R2)/(R3+R4)

If R1= R3, and R2=R4, then 

A= (R4/R1)

We want to convert a 10Vpp signal to a 3.3V signal so the gain should be 1/3.  We can choose R4 to be 33K and R1 to be 100K.

Now we need to choose the positive offset such that the signal is centered at 1.6V.

The gain off the offset voltage is: 

Aoffset= (R2+R1)/R1 x R3/(R3+R4) = R3/R1.

For the previous resistor values, the gain is 1 since R3=R1, and so we use an offset voltage of 1.6V.

Do you need help with an electronics design?  Daycounter provides contract electronics design services. Contact us to give you a quote on your electronics design project.


  1. Belum ada komentar.
  1. No trackbacks yet.

Tinggalkan Balasan

Isikan data di bawah atau klik salah satu ikon untuk log in:


You are commenting using your account. Logout /  Ubah )

Foto Google+

You are commenting using your Google+ account. Logout /  Ubah )

Gambar Twitter

You are commenting using your Twitter account. Logout /  Ubah )

Foto Facebook

You are commenting using your Facebook account. Logout /  Ubah )


Connecting to %s

%d blogger menyukai ini: