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Parameterizable Voltage Controlled Oscillator Model

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Dear Community,

I want to simulate an analog, custom PLL circuit (trans, ac, hb using ADE XL). For this I need to implement a behavioral VCO model, easy task in ADS so Cadence should of course offer a block for it, too. Believe it or not, I don´t manage to find anything...
In Cadence all I find is

  • vsin (analogLib) -> no tuning voltage input
  • vsource (analogLib) -> same
  • osc (rfLib) -> same
  • vco_tuning_curve (pllLib) -> no analog signal output, output voltage just represents the frequency in MHz

All are not suitable, as I need "just a simple VCO block": I want to insert a voltage signal and generate an according output signal, using parameters like free running freq (f_LO), and a linear coefficient (KVCO). Is there something I have overseen?

If not: Right now I am at the point that I might need to use the osc (rfLib) block and try to convert the actual voltage value of Vtune into a parameter which I then put into the output frequency property of the osc.

-> next problem arises:

How can I use a voltage value from the simulation and render it usable in the output frequency expression?

I appreciate any help.

Best regards,

Janis


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