I do not know if a generator that outputs +/-20V into a 50 ohm load.

Which is not what the TS is looking for. He is looking for 0-20V into high imoedance. The specs say it can do that. They may be lying, but I would not assume so.

 

Which is not what the TS is looking for. He is looking for 0-20V into high imoedance. The specs say it can do that. They may be lying, but I would not assume so.

Yes BobTPH what i'm looking for is a generator driving its output (High Impedance) from 0 to 20V sine wave (or square wave). The max frequency: 200KHz is ok (not critical).

 

My budget is in order for a the Siglent you quote. But, these Sigilent can produce a 20Vpp wave with an offset of 10V ? As in the attached picture ?

No, I checked SDG1032X but not other models.....maybe a job for today as need to PD check more before shipping them out.

 

I'm away this weekend but Monday evening (UK) i'll run up the sdg1032x and validate it for you...

 

OK, I'm sad to say the Sigilent SDG1032X, or at least my 2y old one, can't do 20vp-p with a 10v offset. It's output is limited to 20v pp max, or 10v p-p with a 5v offset

 

So basically output is limited to ±10V? Their specs are grossly misleading then.

What does it do when you exceed the limit, clip?

 

Mill device: understood.

In English, we say run-of-the-mill or plain vanilla, meaning ordinary (italiano: ordinaria/ordianrio)

 

So basically output is limited to ±10V? Their specs are grossly misleading then.

What does it do when you exceed the limit, clip?

Just won't let you enter the parameter, or adjusts other parameters to fit...

Not sure if current specs apply to my box...

 

I use this B+K 3010 Function Generator. It has DC offset adjustment.
Specifications say ±20V. However mine clips at 15V.

 

OK, I'm sad to say the Sigilent SDG1032X, or at least my 2y old one, can't do 20vp-p with a 10v offset. It's output is limited to 20v pp max, or 10v p-p with a 5v offset

Thank You very much for your check. So, if I'd like to get a wave as the following, i need to put an extra circuits like an active clamper, that shifts the 10Vpp output of the function generator, to a 10Vpp + 10V ?

 

I can just about get 19V P-P with full 10V offset into my scope with my old Philips PM5167, at 10MHz. So if you could find one going cheap......

 

Shifting the output is easy...

Any good rail-to-rail opamp with a 24v supply will do it, or a single BJT

 

Shifting the output is easy...

Any good rail-to-rail opamp with a 24v supply will do it, or a single BJT

Something like this one ?
https://www.amazon.co.uk/RELAND-SUN...0&qid=1684882344&sprefix=ad820,aps,161&sr=8-3

 

Something like this one ?
https://www.amazon.co.uk/RELAND-SUN-Operational-Amplifier-Unity-gain//B09Y45KLMJ/ref=sr_1_3?crid=2BU028BP0ZRIH&keywords=ad820&qid=1684882344&sprefix=ad820,aps,161&sr=8-3

Possibly if it can be adapted. That says unity gain which implies a voltage follower or an inverting configuration whereas my example is non-inverting and a gain of 2.

Better to find an opamp in a DIP package that can easily be soldered on some stripboard. What frequency range, and only sine waves or others as well?

 

Possibly if it can be adapted. That says unity gain which implies a voltage follower or an inverting configuration whereas my example is non-inverting and a gain of 2.

Better to find an opamp in a DIP package that can easily be soldered on some stripboard. What frequency range, and only sine waves or others as well?

A sine wave of 200KHz. The image of the amplifier shows a potentiometer (it seems a potentiometer) so i hope it has some kind of control on the gain. But the product has no specs or technical detail. And no feedback from users.

 

I have this monstrosity, Global Specialties 9004 combination signal generator, RF generator, frequency counter and power supply.

Shown generating a 20Vpp sine at 1Mhz with 10V offset. It clips if I go any higher on either amplitude or offset.

 

Bob!
What a treasure you have got there? Where did you get it?

 

Used on Ebay, I think about $250. A real aoace saver!

 

I have this monstrosity, Global Specialties 9004 combination signal generator, RF generator, frequency counter and power supply.

Shown generating a 20Vpp sine at 1Mhz with 10V offset. It clips if I go any higher on either amplitude or offset.

Very beautiful, i like it. The only problem is the space it takes up. That is the wave i am looking for.

 

An alternative:



Use a fast diode such as 1N914, 1N4148, 1N60P, etc. You need some RL for this circuit to work. Might be 1 Meg since your load is a high impedance.