Can anyone explain this??

Discussion in 'General Electronics Chat' started by YazanJuve, Dec 26, 2009.

  1. YazanJuve

    Thread Starter New Member

    Dec 13, 2009
    Can anyone please explain the below circuit? It is used for current and voltage sampling but i need to know the details :) thx
  2. Wendy


    Mar 24, 2008
    The 4066 is a quad switch, think of it as a SPST.

    It appears to be a circuit to sample voltage and current, under remote control from some other source (hence the 4066).

    U2A is a virtual ground, so the op amps can use a single power supply and still swing plus and minus.

    U2C is a simple buffer, R13 and R16 are simple voltage dividers feeding U2D, another simple buffer. The end result is a very overcomplicated voltage probe.

    Not sure what U3 is, the 4066 switch allows it to switch ranges. It is implied that it measures the current flow, though how is missing.