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Harmonic Balance -LC Oscillator
Hi all,I am facing a weird issue. When I am simulating a LC Oscillator in HB, the Estimated oscillating frequency from Tstab Tran differs around 1GHz from the calculated fundamental frequency. The...
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Problem with Hidden states in Verilog A while running PSS/PAC...
Dear All,I wrote a code in Verilog A to generate four different clocks clk1, clk2, clk3 and clk4 from clk, as shown below. These clocks are used for switching in the filter. While doing PSS/PAC...
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Problem with Monte Carlo in ADE XL: no psf written
Hi,I am new to ADE XL and want to run a MC sim bt it behaves weird and I cannot see/browse the results. I am not sure if I am doing anything wrong or if it is buggy. I am ADE L user so I describe what...
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PSS shooting vs. transient with nport (S-aparm) loading
Hello,I am simulating a differential circuit with a tune-load (LC tank), where L is modeled by EMX. I am using AnalogLib/nport cell to include S-parameter behavior of the inductor in my PSS...
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S11 for bandpass filter
I am designing a bandpass filter using active inductor as shown in attached schematic and had a query in this regard. Since this is a BPF I am interested in seeing its S21 response. But for that ckt...
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RF front-end simulation
Dear collegues,I am trying to simulate an RF front-end (LNA+VCO+MIXER) in order to get performances such as conversion gain, noise figure, etc.If I simulate only the LNA+MIXER and use a Vsin to emulate...
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Guarantee LC Oscillator Start Up over PVTs
Hi all and Andrew,I have a question which I think it has been examined thoroughly but I would like to clarify to myself something which is not very clear to me.The question is:Which testbench-analysis...
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Error in Evaluating IIP2 with Monte Carlo
Hello All,I would like to know why Monte carlo iteration is being terminated prematurely while computing IIP2 due to the following error:ERROR (SPECTRE-8003): mc1_subckts: Error evaluating ocean...
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The issues with Ports!!!
As i carrying out simulations using the port instance in analogLib, I noticed that when i define a pulse and dc port, i have this offset of 310.mV on the output of the both the pulse and dc. Please...
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Stability analysis of PLL
I am designing a PLL and I want to plot the frequency response of it. I have chosen to plot it using STB analysis in cadence. So what I have done is I did break the feedback loop from frequency...
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How to compare what Spectre interprets from the raw s-parameter file?
I wanted to know how to view what Spectre interprets from a raw s-parameter touchstone file? Is there a created pole/zero file that that can be compared, and also later reused?
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RF frequency synthesis problem- how low power?
I'm an undergrad working on the analog frontend for a student-developed cube satellite. After looking at the options, I've decided to use the CML Microcircuits CMX994 for the receiver and the CMX998...
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In PSS, direct plot of harmonic frequency gives single frequency - i need range!
Hi, I'm simulating injection locked oscillator, i want to plot the relation between the control voltage and the output frequency.I know that pss is not the best choice for that but i found this...
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PSS issue when enabling APS multicore simulation
Dears,I'm currently facing the following problem:When running PSS simulation using Spectre or APS (Multithreading Disabled), stabilization time simulation (and subsequent PSS iterations) runs through...
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Help, Corner Analysis doesn't work in vco, error in evaluating the expression.
I'm Simulating a vco and want to get the Kvco and its corner analysis.The Kvco itself is evaluated correctly but its corner analysis is not working. The error that showed up to me is:ERROR (ADE-1057):...
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Figures missing in the RF Design Blogs article of "Measuring Fmax for MOS...
Hi,I am following the steps in RF Design Blogs article of "Measuring Fmax for MOS Transistors": https://community.cadence.com/cadence_blogs_8/b/rf/posts/measuring-fmax-for-mos-transistorsHowever, the...
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Error when starting Momentum
Hi,I am trying to run Momentum from Virtuoso Layout suite. After creating the momentum view starting from the layout view of my cell, the setup screen where I set ports frequencies, etc., I hit the...
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Regarding output power of LC-VCO
In most of the LC-VCO architectures, why the output power doesn't remain constant??What parameters are affected for that?
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Adding same (fully correlated) Phase-noise to two LO paths
Dear All,I have 4 LO paths (LO0, LO90, LO180 and LO270) with 25% duty cycle clock output wave forms.These wave forms are almost squarish and captured form another LO generation circuit...
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