100KHZ Sawtooth Generator crcuit?

[imgemini]

hi friends
i am looking for 100Khz Sawtooth Generator criuit for my college Lab project ....

niose Generator also works :arrow:

 

[williB]

how about a voltage controlled oscillator..

 

[imgemini]

ds

it ok but is it hard to find VCO ........ plesae post cricuit if u have

 

[JimB]

An ICL8038 function generator IC may do.

Try this link:

**broken link removed**

JimB

 

[chemelec]

An XR2206 is also a good Function Generator IC.

 

[imgemini]

hi

i will be great ful if u come up with cricuit

 

[JimB]

Have you ever heared of Google?
Do you do anything for yourself?

I gave you a reference for the 8038 in my original post.

Try this for the XR2206.

https://www.elexs.de/sinus1.htm

JimB

 

[John Sorensen]

100kHz is toward the high end of the ICL8038's capability, but it's also obsolete. You may still be able to find some.

I think the OP needs to put a little more effort into his own research, though.

j.

 

[Roff]

Haven't we been through this exercise before?
Do you need A, B, or C? How many volts peak-to-peak?

 

[imgemini]

fe

thx,s friends

great help

 

[imgemini]

hi

A will be great..........

should be 100Mhz or more but DV offset the output should be 17V - 20V

 

[RDL2004]

The XR2206 circuit looks to be fairly easy to build and will probably make a nice piece of bench equipment. I ordered a couple of those chips and intend to build one pretty soon. Thanks for the info.

 

[k7elp60]

imgenini wrote

should be 100Mhz or

I think you meant 100Khz
I think if you generate a square wave at 100Khz and then feed it to an op amp integrater you will have the wave form that you need.

 

[John Sorensen]

Do you need A, B, or C? How many volts peak-to-peak?

I would say only A is a sawtooth. B and C are ramps. But I wouldn't be contentious about it.

j.

 

[TheOne]

Run a astable 555 timer at 100kHz (it is very near its limit) and you will get the sawtooth waveform of the timing capacitor. You can use a opamp buffer/amplifier to prevent loading of this signal.

If you have to make your own, the basic building blocks are: Constant current source, flip-flop, 2 comparators, a capacitor, and resistor.

Charge the cap from the current source, detect the upper voltage trip with the comparator, flip the flip-flop and discharge the cap through a resistor while detecting the lower voltage trip. Flip the flip-flop and start the charge cycle again..

You have now effectively made your own 555!

At 100kHz you will need a fairly fast comparator like the LM311

 

[John Sorensen]

If you have to make your own, the basic building blocks are: Constant current source, flip-flop, 2 comparators, a capacitor, and resistor.

Probably the biggest difference between the 555 and the 8038 is that the 8038's capacitor is charged by a current source, while the 555's is not. So the 555 will not put out a real sawtooth, but may be close enough.

j.

 

[TheOne]

If a "true" sawtooth is not that important, a simple uni-junction oscillator may also do.

 

[Roff]

Do you need A, B, or C? How many volts peak-to-peak?

I would say only A is a sawtooth. B and C are ramps. But I wouldn't be contentious about it.

j.

Well, John, then I guess I have to get contentious.
According to this site, waveform A is a triangle wave, and the other two are sawtooths (sawteeth?). I gotta say they all look like triangles to me - maybe A shoulda been called an isosceles triangle wave. I can see why the other two are called sawtooth waves.