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Recent content by vojtik

  1. V

    PWM to voltage conversion - OpAmp offset.

    Thanks for the hints. I'll try and let you know. First of all must change the MCU that passed away during the last experiments.
  2. V

    PWM to voltage conversion - OpAmp offset.

    PWM driver information I have: HSD type, output has 4.7nF to GND, VCC has 220nF to GND at driver side. For RHS reccomended values: 1k5 ... 20 kΩ
  3. V

    PWM to voltage conversion - OpAmp offset.

    Guys, I checked once again the circuit. It's correct. Also tried to play with the C1,C2 and resistor values according to different designs in Microchip FilterLab. Used a different piece of TLC271...and no success. No more ideas why this doesn't work.
  4. V

    PWM to voltage conversion - OpAmp offset.

    Thanks. The output goes directly to Analog input pin of an Atmega8 MCU. With the DC input the output is exactly the same as input (+/2mV) so works well with DC. Anything i can diagnose? Have a limited equipment (about 10kHz probe, no oscilloscope at the moment) I overtook this circuit from an...
  5. V

    PWM to voltage conversion - OpAmp offset.

    Hi all. I'm strugling with PWM to voltage converter. PWM duty 0-100%, ampl. 5V, freq.300Hz-3kHz. PWM signal is produced as High Side Driver (pull down resistor at converter's side). Current capability up to 2mA . Please help me to debug the following circuit which is supposed to convert PWM to...
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