opamps

  1. C

    A small problem question about opamps

    Vo = -R13 / R14 x Vx + (R16 / R15 + R16 x R14 + R13 / R14) x Vy Vo = 4 + 4,5 = 8,5V hello everyone In this case, in order to find Vo, the equivalent of Vo comes in this way. But I understood everything until the -R13/R14 x Vx part. But I couldn't understand how to do the inside of the next...
  2. D

    Is this amplification circuit possible?

    I don't know much about opamps. The idea is to use various opamps in series, with different charateristics according to the input voltage, but with the main goal to increase the peak voltage,let's 5 or more volts, and mostly keep the sine wave frequency of the orginal circuit. Is this possible...
  3. [solved] 4-20mA floating output (line) - can it be done w/o actually galvanic isolation ?

    At a facility, I came over some sensory equipment (ref. device A) that feed 4-20mA to a HMI device (ref. device B). During fault location, I couldn't miss noticing that a 4-20mA output from device A, two terminal feeding into a wire with 2 strands to another room - that measuring voltage between...
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