Which way is the best for dividing the voltage?

[doctoragon]

I have a voltage source thats output is 200V and frequency is up to 2kHz max.
How can I divide this signal without signal form and phase shift for 200V/4V rate?
Can I use transformer in charge adapter? all I know, used ferrite cored transformes for SMPS and in kHZ frequency range.
Can be used voltage divider made of resistor. But there is a problem like that. Resistor values creep with ambient temperature. I guess, must be made compensator cicuit with used diode or any temperature sensor for compensate the signal.
Can be used op-amp for reducing voltage. But op-amp output is depend ambient temperature like resistive divider.

Thanks for replies.

 

[thylacine1975]

Without a doubt your best bet is a simple resistive voltage divider for simplicity and bandwidth (DC -> GHz+).

If you're worried about temperature variation, use high precision resistors for the divider - 0.1% tolerance components are readily available (read: cheap), and you can find (expensive) parts better than 0.01% for demanding applications.

If your circuit source/load impedances make the resistance values impractical, then you'll probably need active components such as op-amps. These are available in very low temperature coefficient variants (for example "chopper stabilised", Analog Devices' so called "zero drift" range etc) with offset drift values of order 50 nV/degree C. In the absence of more detail about your application I can't say for certain, but a 2kHz bandwidth requirement is fairly gentle for even high precision circuits - so don't be too alarmed about introducing phase shift errors when reaching for an op-amp.

 

[jiripolivka]

If your source and load have a common ground, you can use a simple resistor voltage divider. If you are concerned of temperature variation, you should work on the divider, select stable resistors or use a thermistor, and calibrate the divider over temperature.
Without the common ground you will have to use a capacitor voltage divider, and again calibrate its response over temperature, etc. You can also use an audio transformer (like in old phone modems), the same procedure.

 

[FvM]

Without the common ground you will have to use a capacitor voltage divider

May be appropriate in special cases, but hardly a general solution, I think. A differential voltage divider (resistive or compensated RC), as it's used in differential oscilloscope probes should be widely applicable.