Simulation of twin t bandpass filter with potentialmeter in pspice!!

Discussion in 'The Projects Forum' started by jin8820, Mar 7, 2011.

  1. jin8820

    Thread Starter New Member

    Dec 8, 2010
    3
    0
    Hi all,

    I am trying to simulate my twin t bandpass filter with adjustable Q and constant gain but i am facing problem on it!!

    i am using PSPICE schematic version 9.1.
    i have included a potentialmeter on my circuit(as attached) on it. when i simulating it, error occur at the potentialmeter node, it showed " Less than 2 connections at node $N_0011".

    below is the output file result:

    Can anyone give me some advice on my problem?? appreciate it alot...

    thanks thanks..
    View attachment twin t bandpass.sch
     
  2. jin8820

    Thread Starter New Member

    Dec 8, 2010
    3
    0
    Hi all,

    seem like i got my solution for my above problem, i make my floating node (potentialmeter) connect to the above wire. (as shown in pic). twin t.jpg

    my purpose to design this filter is to get a constant gain but high Q factor bandpass filter. My center frequency is 225Hz. i need a sharp peak for my filter.
    Can anyone give me some suggestion how and which parameter to adjust to make the filter has high Q (Q=20)?? i have attached as well my graph..
    graph.jpg

    By theory i studied, increasing the C3 value will increase the Q value, but since i tried on it, i still failed to get a high Q filter.

    hope to see ur reply...thanks a lot!!
     
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