Hello Everyone,

I need to convert a single input ended to a differential one. They give me an example using only resistors as in the image I attached. I´m not sure how to calculated the different values of the resistors or analysed this circuit. Could anyone help me?

Thank you.

 

Hello there welcome to AAC
Did your instructor show you the difference between single ended inputs and or outputs and differential inputs and or outputs?
Say no please.

 

Thank you for your fast response. They taught me the basics but maybe for my inexperience I´m missing something here

 

First question,
Analog as in a micorphone, or digital as in LVDS / RS422 ?

 

It´s an analog signal.

 

First question,
Analog as in a micorphone, or digital as in LVDS / RS422 ?

It´s an analog signal.

 

Hello there welcome to AAC
Did your instructor show you the difference between single ended inputs and or outputs and differential inputs and or outputs?
Say no please.

Thank you for your fast response. They taught me the basics but maybe for my inexperience I´m missing something here

 

Analog, you need to either use a transformer or a differential amplifier

such as

https://www.allaboutcircuits.com/textbook/semiconductors/chpt-8/the-instrumentation-amplifier/

 

Analog, you need to either use a transformer or a differential amplifier

such as

https://www.allaboutcircuits.com/textbook/semiconductors/chpt-8/the-instrumentation-amplifier/

The TS wants single-ended to differential, not differential to single-ended, which an instrumentation amp does.

Analog single-ended to differential can be done with two op amps, one inverting and one non-inverting.

 

The TS wants single-ended to differential, not differential to single-ended, which an instrumentation amp does.

Analog single-ended to differential can be done with two op amps, one inverting and one non-inverting.

@crutschow, your right, sorry mis read,

Yes the OP wants either a transformer or a single ended to differential amplifier

Wonder what his frequencies, voltages and bandwidth are ?

e.g.

https://www.ti.com/tool/TIPD131?utm...pWTdGn94KezX7mNCHQgaAt_GEALw_wcB&gclsrc=aw.ds

 

@crutschow, your right, sorry mis read,

Yes the OP wants either a transformer or a single ended to differential amplifier

Wonder what his frequencies, voltages and bandwidth are ?

e.g.

https://www.ti.com/tool/TIPD131?utm...pWTdGn94KezX7mNCHQgaAt_GEALw_wcB&gclsrc=aw.ds

Hello again,

Thank you both of you for your time. I knew you can use and OP to convert differential entries to singled one but not the way around.

The entry specifically it´s from a NTC sensor to measure temperatures. Then they use a microcontroller to measure it. But before that they use this "bridge" of resistances to convert it to a differential signal. I´m not sure how it´s works...

 

I´m not sure how it´s works...

Neither am I.
That does not create a true differential signal.

 

Neither am I.
That does not create a true differential signal.

Thank you for your help. I think I'm gonna use some of your ideas using the OP. There are another way to create a differential signal without this component?

Regards.