ruwan2
Member level 5
Hello,
I am familiar with DSP in recent years, but not in analog circuit analysis. When I try to simulate a charge pump circuit in a PLL, I have a few questions on the charge pump.
1. A RC network behaves different for a voltage source and a current source. For a current source, the voltage cross the capacitor increases linearly while it is not linear for a voltage source. The same Laplace transform can be used for a current source driven RC network? Or, some modifications are needed?
2. How do I simulate a current source charge pump? I don't see a mechanism or library component for the charge pump simulation in Matlab/Simulink. There is a current source component in "Electrical Sources", but it is not for this PLL simulation purpose. I don't see it is useful here.
Can you help me on the questions?
Thanks,
I am familiar with DSP in recent years, but not in analog circuit analysis. When I try to simulate a charge pump circuit in a PLL, I have a few questions on the charge pump.
1. A RC network behaves different for a voltage source and a current source. For a current source, the voltage cross the capacitor increases linearly while it is not linear for a voltage source. The same Laplace transform can be used for a current source driven RC network? Or, some modifications are needed?
2. How do I simulate a current source charge pump? I don't see a mechanism or library component for the charge pump simulation in Matlab/Simulink. There is a current source component in "Electrical Sources", but it is not for this PLL simulation purpose. I don't see it is useful here.
Can you help me on the questions?
Thanks,