# How can u convert square wave signal to sine wave

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#### olanre

##### Junior Member level 1
convert square wave to sine wave

I have been working on aninverter but I found out the inverter could not power on a television or computer monitor.I think probably the problem is due to the characteristics of the output waveform,which is square.Please how can I solve this problem?[/url]

#### plusminus

##### Full Member level 1
how to convert square wave output to sinewave

Use a passive low-pass filter. Mostly an inductor in series with your load or a capacitor in parallel. But you never get a real nice 50 or 60Hz sinewave.

alarape aliyu idowu

### alarape aliyu idowu

Points: 2

#### didiet78

##### Junior Member level 1
how to convert square to sine

Change your inverter with modified sine wave
Or technology.niagarac.on.ca/people/mcsele/i2k.htm, Professor Mark Csele's Projects Page - The I2K Power Inverter

Annal Manickam

### Annal Manickam

Points: 2

#### Davood Amerion

convert sine wave to square wave

I think output power of inverter is not sufficient,
so its output voltage dropped when connect to load.

Points: 2

### Annal Manickam

Points: 2

#### olanre

##### Junior Member level 1
convert square to sine wave

Re 12v-220v modified sine wave inverter reply by didiet78. I appreciate your reply to my request. I have look through the circuit diagram but the text is written in a language i don't understand. The transformer in the inverter schematics, is it not a laminated core transformer? Can u please direct me to the site where i can get detail of the schematics.Thanks a lot

Arnold De La Cruz

### Arnold De La Cruz

Points: 2

#### A.Anand Srinivasan

converting a square wave to sine wave

well powering up a tv needs very high voltage and hence pulse transformers are used for this purpose... they r specialised to have square wave as their input,,,, ordinary transformers suffer in the case of pulse due to the abrupt transition...

#### nguyennam

how to convert square wave to sine wave

Some cases, people can convert the squarewave voltage to sinewave one by using the resonance transformer with primary winding connected to the square source, and the secondary in parallel with a capacitor making a resonance circuit at that frequency and providing the sinewave output. The sinewave here is perfect.

Arnold De La Cruz

### Arnold De La Cruz

Points: 2

#### andre_luis

##### Super Moderator
Staff member
sine wave 12v-220v pdf

It is possible to filter also 3rd and 5th order harmonics by swicthing a square wave at defined timmings. See that :

The implementation bellow works with 2 levels of waveform. In practice, is harder to implement. The solution purposed above is easier to perform.

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#### newtonn

##### Newbie level 3
am very happy to be among of top 10 engineers..................................happy

Points: 2