High-speed widerange voltage to current converter

Discussion in 'Analog & Mixed-Signal Design' started by prof_zlyh, Aug 29, 2016.

  1. prof_zlyh

    Thread Starter New Member

    Aug 29, 2016
    2
    0
    Hello.

    I have differential voltage signal, which represents pulses. Form of this pulses can be rectangular, gauss, exponential and parabolic. Duration of this pulse can be between 50 and 1000 ns. Rise time and fall time of rectangular pulse 2-5 ns. Amplitude of this pulses can be between 10 mV and 2.5 V. I need to convert this voltage pulses to current pulses with amplitude (current signal also should be differential) from 10 nA to 1 mA. Furthermore, output of this converter should be isolated from external circuit, because there is high voltage (about 300 V). So, i need high-speed wide-range voltage to current converter. Do you have any suggestions?
     
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    How About a resistor in series with a transformer?
     
  3. AlbertHall

    Well-Known Member

    Jun 4, 2014
    1,931
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    The transformer will need to be a bit special to handle the pulses faithfully.
    What is the output impedance of this voltage source?
     
  4. prof_zlyh

    Thread Starter New Member

    Aug 29, 2016
    2
    0
    Output impedance is 50 Ohm.
     
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