AD633 multiplier connection error

Discussion in 'General Electronics Chat' started by syee10, Oct 4, 2010.

  1. syee10

    Thread Starter Member

    Mar 26, 2010

    Currently i am using Proteus 7.4SP3 to simulate the AD633 multiplier. The two input is a trend of pulses and i want to get the output. The problem is that it occur 2 warnings which is then stopped my simulation.

    1. [SPICE] DELMIN increased to 1.11022e-016 due to lack of time precision
    2. [SPICE] TRAN: Timestep too small; timestep = 0: trouble with node #v:u1:nc#branch

    I had attached the jpg for you to refer. Please help and commend about the problem. I need your help very much. Thanks =)
  2. timrobbins

    Active Member

    Aug 29, 2009
    Start by using sine wave inputs rather than square wave to check everything works as it should.

    Sims don't like abrupt changes - you could put the square wave inputs through RC filters to smooth the waveform edges applied to the AD633 - or you could reduce the 'reltol' sim parameter and reduce the time iteration. You may also need to set the I.C. voltage across the caps to help a bit.

    Ciao, Tim
  3. gootee

    Senior Member

    Apr 24, 2007
    If there is an option to set something like TSEED (as in LTspice), try setting it to 0.1 x 10e-6.