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IIP3 simulations: qpss/hb vs hb
Hi,What is the difference between obtaining IIP3 of a mixer with qpss+hb engine hb itself?I am getting signficantly different results and I thought at lea "hb" should be consistent.See example PDF...
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Gate resistance effect in simulation
In MOS models available with me, gate resistance is not modeled. For RF designs since gate resistance values are important, is there any other way to calculate this value for a fixed size transistor...
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Query regarding the Verilog-A code given under "Modeling Oscillators with...
Dear All,I was trying to understand the Verilog-A code given under "Modeling Oscillators with Arbitrary Phase Noise Profiles" .( see the link...
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Ccustom inductor in Virtuoso
Dear all,I have a problem that I cannot solve. I want to create custom component for inductor in Virtuoso. I have drawn layout of inductor in Virtuoso, and then imported it to EM simulator (Sonnet)...
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Gt, Gp and Ga: Significance in LNA matching
HiI want to understand how spectre calculates Gt(transducer gain , Gp( power gain) and Ga(available gain). And what is their significance i.e. how they help in understanding matching of LNA?RegardsVipul
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Edit Object Properties for the Current Source
I am doing simulations in which I intend to generate s parameters from the hybrid pi model equivalent circuit of transistor. I have a challenge on implementing the current source in cadence. The...
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On-chip measured Inductor de-embedding
I have measured s-parameter data form VNA for an on-chip inductor along with s-parameters for DE-embedding structures ( short, open and thru).How can the parasitic data now be DE-embedd from the...
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Harmonic Balance Analysis S-Parameter Impedance Data
Just to summarise the what I’m working on: I’m trying to model ultrasonic transducers (CMUTs) using Virtuoso Spectre. The transducer has a small signal circuit equivalent and a large signal circuit...
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Igfinfet simulation
Hi, I'm a new cadence user and I urgenly need to simulate igfinfet model shown here :Can anyone rescue me with a tutorial or any data to simulat it. Thanks in advance. Regards;Bakr
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Simulation of standalone LNA IC
HiI am designing a standalone LNA to be packagedto be matched to 50Ohm antenna output at its input and also 50Ohm load a its output.I believe in this case I will be using two 2-port element source with...
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same output from two PRBS sources
hiI am using two prbs sources in my simulation. In my circuit ,i want to have same random sequence generation from both sources. how to configure in this situation (i do not want to distribute the...
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Calculate input impedance for matching with spectreRF
HiI am designing an LNA and want to match its input impedance to 50Ohms port impedance. During 'sp' analysis in spectreRF , which function will give me idea about this impedance matching.Gp,Ga , Gmax...
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Query on Harmonic Port element in analogLib
Hi In what applications is harmonic port required. In user guide it mentions that this element is required when different impedance need to be set for different harmonics.Can somebody tell application...
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Quantus QRC for RF design parasitic extraction
HiI want to use QUANTUS QRC for extraction of my RFCMOS circuit layout. Can anybody tell what all options or properties need to be set in ICT file in order to generate qrcTechFile to be used for...
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FATAL (CMI-2010) in transient simulation
My spectre version is: Version 15.1.0.644.isr13 64bit -- 22 Oct 2016Error information as following:Internal error found in spectre at time = 35.7142 ps during transient analysis `tran'. Encountered a...
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Simulation of all Diodes with inverted junction-voltage
No matter what diode-model I'm taking or in whatever way I'm measuring, the junction-voltage of the diode always is inverted, meaning that negative voltages are passed through and positive ones are...
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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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