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Why the HB analysis PXF results are varying with TSTAB period (after...
Dear All,I am running a ring-oscillator with almost sinusoidal voltage output. I am injecting the PAC current at certain point and seeing the PXF result for the oscillator output voltage.I see the...
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channel length modulation slope
Hello i am trying to find the optimal length to have the most insignificant channel length modulation effect.i have managed to create two vertical markers for all sweeps. is there a way to...
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How to append a plot from a .csv file on to an already WaveScan/ViVA plot
Dear All,I have a .csv file with x column (1st column for x-axis values) and y column (2nd column for y-axis values).I have plotted already a waveform in wavescan/Viva.The .csv file is having same x...
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Simulating INJECTION LOCKED OSCILLATOR outside the lock range
I have been trying to simulate injection locked oscillator using HB & HBnoise analysis to get the voltage spectrum & phase noise plot. The ILO is designed such that the current injection is...
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Construct Explorer Expression to evaluate Y over reduced X range
Hello,I am seeking for some help constructing expressions in ADE Explorer. Specifically, I am trying to set up output expressions to calculate specs so that they only apply over a reduced / specific X...
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Can't compile ahdlcmi library
I am trying to use veriloga module in my simulation. But I met an error message ::Compiling ahdlcmi module library.Error found by spectre during AHDL read-in. ERROR (VACOMP-1008): Cannot compile...
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Attach parameter value to exported S2P file name
Hi, I wish to run a set a simulations in Maestro Assembler and to save their output in S2P format.In the Spectre manual I found that I could use %P to attach the (univocal) process ID. It works but it...
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HBnoise Error
I am trying to run a HBnoise simulation after a 2 tone HB Analysis.Here is the HB Analysis setup The HBNoise setup looks like the following My goal is to measure the Noise Figure(NF) by considering the...
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Does hbnoise support the ideal switch from analogLib?
I am running the circuit below and get the phase noise using pss/pnoise as well as hb/hbnoise. It is a frequency divider(divide-by-two) in which I used sample-and-hold circuits instead of latches to...
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How to reuse circuit INITIAL conditions (at simulation time t=0) at multiple...
Dear All,I want to inject a pulse current at certain node of a periodic circuit like Oscillator.I need to check the oscillator's steady state phase shift if the pulse injection happens at different...
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Noise Analysis for Modulated Noise Using Verilog-A Modelling
Hi Community,I am doing experiments about modulated flicker noise and I aim to stick to Verilog-A behavioural modelling.Below is the test bench I brought up and the Verilog-A modules that I wrote...
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K Stability Factor Simulation Results Do not show up
Hi, I have designed an LNA and am going to check the k Stability factor. When I run the s-parameters I plot the k-stability factor, but nothing shows up and the screen is black and nothing is there....
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plotting two op parameters simultaniosly
Hello , I am trying to plot simultaniosly rout and region op on the same plot.A Ids rout,Ids region,(both as a function of vds) were created succsesfully, however when i do one plot and select append...
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test signal iprobe rout calculation
Hello , i am trying to extract small signal Rout of a circuit with test source sweep.For that i have defined and ac sweep of a test source on the output and to divide it by measured current in...
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Modulated PXF results are confusing
I am trying to run modulated PXF to evaluate the supply sensitivity of a VCO. I went through the examples in the following documents:- PSRR_Osc_AN- Virtuoso Spectre Circuit Simulator and Accelerated...
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individual sweep for each simulation in ADEXL
Hello, I am trying to simulate two types of sweep, Ids vs Vgs (vds sweep)Ids vs Vds (vgs sweep).I was able to create one of them separatly by changing the global variables,As shown bellow .However i...
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output resistance test vs I_out(Vout) test
Hello for a basic current mirror when we do an output current characteristics then we sweep test voltage source and measure mos drain current.To calculate the incremental output resistance i saw a...
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simultaneous bias on range of DC sweep
Hello, i am trying to bias the mosfets to be region=2 on a range on Vtest values as shown in the plot bellow.I have defined DC sweep at ADEXL and made several parameters as shown bellow , i have...
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The values of RD and RS in small-signal MOSFET model
Hello,The following figure depicts the small-signal MOSFET mode of a transistor. Rd and Rs represent the ohmic resistance of the drain and source, respectively. It seems that they are only dependent on...
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saturation state OP parameters dont match DC saturation formula
Hello i am trying ti match the following circuit.When i looked at the parameters ,region =2beta=1.911*(10^-3) ( miu_0*Cox )vth=0.473I_ds=101.64*(10^-6)i put W=1u L=180n as transistor sizes.But when i...
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