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Recent content by kramper

  1. K

    How to plot frequency response for nonlinear closed loop system

    The nonlinearity comes from the phase detector(PD) and the equation is represent by triangular wave.
  2. K

    Design the PLL with XOR gate PD in simulink

    Hi schmitt trigger, The loop filter is PI (proportional integral) type. The transfer function of the LP is (33.2s^3+266.16s^2+517.88s+742.6)/s^3
  3. K

    How to plot frequency response for nonlinear closed loop system

    Is there any other methods that can be used to plot the frequency response of the nonlinear closed loop system? Because from what I know, the frequency response/bode plot in matlab can be used only if the system is linear. Thanks in advanced. attached is the nonlinear closed loop system.
  4. K

    Design the PLL with XOR gate PD in simulink

    Hi, I would like to know how to design the PLL with XOR gate PD in simulink. Attached is my simulation block. At high input frequency (ex:30MHz) the system is locked, however at lower frequency (ex:100Hz), the system is not locked. Is there any mistake in my model? can someone give advice on...
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