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## SRAM write noise margin (WNM) procedure in cadence

Hai I am trying to get WNM of SRAM. I am following the procedure given in the book "Robust SRAM designs and analysis". I have attached the WNM graph (Fig1_WNM_book) from this book. My doubt is: As per the procedure, BL line is connected to Vdd and BLB line is connected to gnd. The voltage at source node Q is sweeping while monitoring QB an

## [Moved]: Noise Analysis of Pixel Circuit in Cadence

Hello all, I am currently designing some pixel circuits for my bachelor thesis and am trying to analyse the noise of such a pixel using cadence. I have a couple of questions regarding this aspect as I am new to this.. Also please consider that the pixel is a black box (made up of a photodiode and transistors) whose (...)

## [Moved]: Noise in RMS and PSRR calculation in Cadence

Please can anyone one help me in calculating the noise in VRMS. I have got the noise in cadence in uV/sqrtHz now I want to convert the uV/sqrtHz in Vrms. I have the noise result attached. Do I have to use calculator if yes the how? I want to calculate PSRR in cadence of an OTA. Can any one help me step (...)

## [Moved]: Divider pnoise in the PLL

Hi, i want to get the overall pnoise of the PLL in Matlab, so i firstly stimulus the pnoise of several components in the cadence ADE, the simulation pnoise of Divider is about -120~-130dBc/Hz, and the noise power spectral density is about -160~-170dB/sqrt(Hz), i want to know is it normal? if (...)

Hi everyone, I am designing an offset cancellation circuit and I want to do a noise simulation. My goal is to do the simulation using the circuit without the offset cancellation technique and then using the same topology using the offset cancellation technique and compare both noises. I have tried the (...)

## noise and dynamic range analysis an calculation

Need help in understanding some things about noise and dynamic range analysis. 1) We know THD (total harmonic distortion) and THD+N (THD+noise), which is THD measured with transient noise ON in cadence. Am I correct? 2) For a given input frequency and (...)

## [Moved]: Noise Analysis of a Transmission gate in cadence

I have made a simple transmission gate with one input (for signal with sinusiodal voltage input V0), a control (logic 0/1 to make switch On /OFF, with dc voltgae) and an output across a resistor. I want to do the noise analysis of this circuit. 1) Since it is not a differential circuit, how can i have positive and negative output nodes, (...)

## S Parameter in spectre and ADS

See You can see a defintion of NF(k) in Keysight ADSsim and GoldenGate. If you use more than three ports, e.g, port1=RF, port2=IF, port3=LO, NF(2) is different from NF of cadence Spectre. Here you have to use resistor + vsin instead of port3=LO.

## Simulate the jitter of a ring oscillator in Cadence

Hi, i want to simulate the jitter/phase noise of my ring oscillator. The oscillator frequency is about 2 GHz. Actual i just simulated the transient behaviour. I took a look at tutorials, but I'm not sure with all that settings for correct noise simulation. My idea was, to simulate 'transient noise' in transient simulation (...)

## how to simulate the input refered noise of an integrator in cadence/spectre

As the figure shows, do the noise simulation, but the output and negative input node of the amplifier is not "directly" biased, how to get the input referred noise data from simulation? Thanks 129361

There is no tool whose name is cadence. Even if you use cadence ADE, we can use various vendor's simulators such as Synopsys HSPICE, Mentor Eldo, Keysight ADS, Keysight GoldenGate, cadence Spectre, etc. Always describe correct tool's name and vendor's name which you use as tool or simulator.

## SRAM Write Noise Margin Butterfly curve in cadence

please help I need to draw butterfly for Write NM for SRAM cell I cut down the inverter into two halves to get the VTC for both INVA and INVB as it is shown in the figure, the result should be as shown in the graph but I got different result, the green curve is wrong while the red one is right, What is the problem with this curve ?? Please

## Calculation of random jitter fom phase noise of vco in PLL

I have a 16GHZ pll and div by N is 160. I am trying to calculate random jitter from phase noise of VCO. I TRIED IN cadence by setting noise source type as jitter and then selecting FM jitter or PM jitter. I was wondering how to plot jitter information using above choices I have made in (...)

## calculating random jitter in PLL from VCO phase noise

I have a 16GHZ pll and div by N is 160. I am trying to calculate random jitter from phase noise of VCO. I TRIED IN cadence by setting noise source type as jitter and then selecting FM jitter or PM jitter. I was wondering how to plot jitter information using above choices I have made in (...)

## THD of low pass filter for ultra low frequency

I have designed a low pass biquad for cutoff 14Hz. I have done its dft and thd. I got thd 125.814. What does this value mean. In the help guide of cadence calculator, it say the formula returns voltage percentage. Please help me to understand this. With dft I got the follpwing graph 124160 When I use the log scale I

## calculation and plot of phase noise for phase frequency detector in cadence

Hi all, I am trying to find how to find phase noise for phase frequency detector in PLL in cadence. Everyone is discussing about phase noise in VCO. Please any one can help me in finding phase noise value and plot in cadence. Regards, tanya dey

Hi can someone pls explain to me what is PVT analysis and how to do the analysis in cadence. I understand a circuit has to be tested under different conditions say if the voltage varies, and how stable it is in varying temperature and also the same functionality is met even it some changes occur during (...)

## Folded cascode opamp design procedure using cadence

I need folded cascode design step by step, i want to implement it on cadence 180nm suggest me the procedure or ieee paper through which I can design Folded cascode opamp using cadence

## transient and ac analysis on cadence virtuoso

hello I am simulating low noise transconductance amplifier circuit in cadence virtuoso and for the transient analysis I am getting the output current as 10 microampere when the input is fed at 2.4GHz and when ac analysis is done then the output at 2.4Ghz is showing as 10.339 mA.I could not understand the (...)

## How can I get spectral response (frequency domain) of an oscillator like shown in pic

friends how can I get spectral response (frequency domain) of an oscillator like shown in the pic using cadence virtuoso....

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