Recent content by zhiling0229

  1. Z

    Embedded System wave file player

    Hi guys, I'm trying to build an embedded system wave file player. This is the block diagram for this system that I thought off. A microcontroller will receive an input. The microcontroller will fetch the desire wave file from the EEPROM and will send to the D/A converter and output it to the...
  2. Z

    Converting negative analog voltage to positive

    Thanks Audio guru your a great help  ;D, Was wondering is there an alternative method instead of using another OP-AMP.
  3. Z

    Converting negative analog voltage to positive

    Hey guys, I need to find out how to convert an analog voltage that is negative to a positive voltage. For example a -1.87V to 1.87V. Thanks guys. Really appreaciate it.
  4. Z

    Op-amp or trans-impedance amplifier

    Thanks Audio Guru, I think I have resolve part of the problem already. I'm posting a new problem in the community board hope you can help out.
  5. Z

    Op-amp or trans-impedance amplifier

    hi audio guru, I am not performing any modulation but I will be using my operational amplifier as a current to voltage converter. converting a maximum of 11.4 uA to a maximum of 2V. Do you any operational amplifier that requires a maximum of
  6. Z

    Op-amp or trans-impedance amplifier

    Thanks audio guru. But it looks kind of complex.  ;D I will be using a UV photodiode which the wavelength is from 200nm to 320nm therefore the frequency will be in THz. I don't think i can filter it using the circuit. Here are the two circuits that I plan to used circuit 1 is using a general...
  7. Z

    Op-amp or trans-impedance amplifier

    Hi guys, I'm a newbie. I'm working on an amplifier for my photodiode project. I was wondering which has better performance a general purpose op-amp with a feedback loop or a trans-impedance amplifier or is there a much better way to amplify the current? I'm open to any suggestions. Thanks
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