# Calculate iip3

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56 Threads found on edaboard.com: Calculate iip3

## Have this circuit in ADS and i want to calculate IIP3

i have this circuit in ADS and i want to calculate iip3 . can anybody help me?

## i need help for calculate iip3

hi i hope :the sentence is correct:?: i cant calculate iip3 for lna with ads?:sad: pleas help me

## How to define the IIP3 of receiver???

Hi how much is enough as iip3,is depend from the maximum input signal that you expected to receive without distortion,you can try to calculate iip3 with AppCAD (it's free).

## IIP3 & noise figure in Aplac

How I can calculate iip3 & noise figure & 1dB com. with Aplac I designed gilbert cell mixer with mosfet (BSIM3 model) and i want to quickly compute main parameter of mixer with aplac v7.6. any one can help me?

## IIP3 @ 10MHz offset for WCDMA

First of all I don’t know what MWJ article you are talking about. This is a standard RF systems formula. Second, you have to follow the WCDMA spec for levels, spacing, etc. Third, seems that you are looking to calculate the LNA iip3 not Receiver iip3. They are different things.

## How to calculate IIP3 for a system according to standards

Dear all, I know the expression of P_iip3=(3P_in-P_im,in)/2; it leads to P_in=(2P_iip3+P_im,in)/3, to get P_in,max, let P_im,in=F (noise floor). P_in,max=(2P_iip3+F)/3. There are two variables in equation, P_in,max and P_iip3. In RF system design, which one should be (...)

## Formula for calculating IIP3

calculate it , or simulate , it if u want to calculate it , check the book of the razavi , RF microelectronics , it is very good khouly

## how to simulate IIP3 in ADS

can u explain more than? i cant calculate iip3 with this formula:ip_3=ip_3(vout,ssG,.....):-( thaaaaaaaaaaaaanks

## How to draw the IIP3 versus bias current in spectre?

Write your iip3 equation in the outputs menu and then make your simulations by changing bias current utilizing parametric simulation.So, when you change bias current, for each step PSS+PAC will calculate iip3 and you'll obtain iip3 vs bias current curve.

hi all i want to calculate iip3 in ADs. I have 2 inputs LO and Rf freq for zero if receiver for wimax .the centre freq is 5.20 GHz.what will be the indices and equation required to calculate iip3 pls help

As your circuit is characterized by voltage (and not power) gain, be sure you appy and measure correct sources and loads. A common practice is to talk about equivalent power levels. for example you can express the input voltage as equivalent power to 50 Ohm load. To do so, take the 50 Ohm source and connect to 50 Ohm resistor. Take the input volt

## IIP3 of Mixers on Spectre

One point that people miss while following those tutorials is that port instance at ouptput and input. They should be given a proper source resistnace, according to your circuit. Dont follow blindly the same procedure if you are designing with CMOS as the given examples are with Bipolar transistor. calculate appropriately your input and output

## questions in receiver nonlinearity specs for mobile WiMax

Hello all, I am trying to get the receiver specs for a mobile WiMax tranceiver, in the standard, the only indication i found to receiver nonlinearity is given by the "adjacent and nonadjacent rejection at BER=10e-6 for 3 dB degradation C/I" numbers. I really don't understand the term "for 3 dB degradation C/I"?, the standard doesn't give any de

## IIP3 for RF front end in 802.16a

I need iip3 of front-end for designing a 5 GHz Mixer in 802.16a. How I can calculate the value of the power of the input interferer,

## How to calculate THD in spectre

yes it is, as can be seen in the wavescan user guide (calculator functions) for THD just multiply it with 100 and you can use it to calculate ENOB or SN(D)R

## IIP3 measurement_two tone analysis

the 3rd order intercept point (2F1-F2) this should produce a frequency close to the RF signal so select channel and calculate the 2F1-F2 = Fchannel khouly

## The design steps for the Gilbert cell down conversion mixer

Hi, thanks...... how to calculate the widths of the transistors for a given frequency is not clear....... Thanks........

## How to simulate IIP2 of an LNA in Cadence?

Hello, In order to simulate the IIP2 with Cadence, you do the same when you calculate iip3. But you choice the order of intemodulation which is 2. The attachement file can help you. Good work

## How to simulate the IIP3, NF of a non-50 ohms input circuit?

For a circuit whose input impedance is high, how to simulate its iip3, gain, NF so that I can use these parameters to calculate the iip3, gain, NF of the overall cascade chain?

## How to make IIP3-NF larger?

I've never used 0.35 Thus I do not know exactly You'd better calculate it yourself. Bosco Leung's book on microwave VLSI circuit design would be helpful. thankyou! I guess there maybe some optimum value for iip3-NF under certain current . Is it possible to achieve iip3 around 10dBm NF<15dB current tail<1mA 2G downconverti

## How to calculate the third order distortion of the cascaded components? Any equations

The Cascade calculation formula of Gain/NF/OP1dB/OIP3 can use Cascade or the tool I developed[/URL

## How down-conversion mixer IIP3 influnce the receiver linearity?

Use the free software SysCal to simulation, you don't need to calculate yourself.

## P1 dB and iip3 for homodyne receivers

hi all i am simulating zero -IF receiver for wimax. i want to calculate 1 dB compression point but in HB it is not allowing 0 Hz as output frequency. and for 3 mixer tones what is the iip3 equation pls help thanks

## How to calculate the IM3?

1. Suppose PA OIP3=+40dBm 2. At PA output port, one CW is +26dBm. 3. At PA output port, another CW is +14dBm. 4. How to calculate the IM3 of the two CWs at the PA output? Thank you very much.

## Newbie: what is IIP3 and how is it measured via Sginal Generator andSpectrum Analyzer

hello all, for the moment i am measuring some characteristics of a mixer with RF, LO & IF ports. I have read some article about taking measurements but not every thing is so clear enough. I have few questions. 1. very basic question. since we give LO and IF to a mixer and measure RF at output (up-conversion). when we say i/p power vs o/p power. w

## Swept PSS Analysis - SpectreRF - IIP3

Greetings Reader, I am simulating an amplifier (A simple one) The amp is merely a differential pair with a tail current source and resistive load. Differential Input Differential output. I placed 2 ports at the Gates of the Pair - each of them having first and second sinusoid amplitude set to pin in dBm and swept pin in a swept PSS analysis

## DC Offsets in Direct Conversion receiver

Anyone can show argorithm of DC offset calibration Circuits? Thanks. My understanding is that they send a KNOWN training sequence at first, where the direct receiver will receive and distort it due to DC offset errors, but then since it already knows the sequence, it can calculate the error in I and Q due to DC offset, a

## How to start learning analog circuit design

Choose one text book and read it very carefully> Try to do all of the exercise. Start to design a very simple Op-amp. Use your hand calculation to calculate the gain, bandwidth, pole etc..Change the size of the cap, the transistors and observe how these affect to the output. Use your spice simulatio to check the result. This is a very good start.

## what is difference between IP3in and IP3out?

hi all,how i calculate IP3in and IP3out in ads2003 regards

## what do you think about Hspice for RF design?

Because it lacks for display function like NF, iip3 and 1dB point, another fatal problem is that it can't show data on smith map. You still can write your own equations to compute these parameters but its not intuitive. For linearity analysis, most people use FFT to calculate the 3rd order or 2nd order IM term. But it needs a long time to do a

## How pac analysis works in spectre??

1. You can have your small-signal excitation input in the "pacmag" parameters of vsin source. If you have more then one input excitation, the output is just the linear combination of the response by these many excitation by superposition. 2. The pac analysis will include frequency conversion effect, i.e. you can calculate the gain from one side

## OIP3 & OP1dB values of an active mixer

To Mazz, From P1dB figure, we can find that the POWER gain is roughly -32dB, but the VOLTAGE gain figure shows that the VOLTAGE gain is 0dB, so the difference between these two values is resulted form the difference of Zin and Zload, or, impedance mismatch. OIP3(dBm) = iip3(dBm) + "POWER" Gain(dB) ; OIP3(dB) = iip3(dB) + "VOLTAGE" Gain(dB).

## Mixer gain: Gain_Power? Gain_Vol? Gain_Vol_dB?

But since other blocks like LNA use power gain, how to calculate gain, NF, iip3, P1dB... with power gain and voltage gain directly? If can not, it is no point to use db for voltage. Am I correct?

## How to use Hspice to find IIIP3, noise figure, input and output impedance of LNA

Hi. HSpice is not a very good choice for RF applications. However, there are some ways to calculate those parameters. by .DC analysis, HSpice will automatically declare dc power consumption but for ac power consumption you should use integral operator and its not a very easy way. for Noise Figure, by using .noise statement HSpice will report input

## some basic questions on LNA

U can use L transformer to obtain amflification . ( eailier i'd discused with my teacher about it , at that time i had to write program on Matlab to calculate circuit 's parameters . I did some mistakes , and didn't get any amplification . I thought as khouly that passive netword does not give amplification . After doing more accurately program i g

## a problem about output matching of LNA

There are several ways: 1. Use HP-ADS, import your circuit. You can use L, T or Pi matching filter and add it to the output of LNA (drain). Let the HP-ADS generate the Smith Chart for you and all you need to do is to adjust the values of C and L and check the Smith Chart to see if you are getting what you want. Sometimes C or L tapped matching f

## Help me bias and get suitable w/l ratio for a mixer design

hi.. i'm a undergraduate student and now i'm working on designing a downconvert mixer for my project. for the purpose of learning, i'm working on single balanced mixer. i have the circuit. but i really dont no how to bias it and determine suitable w/l ratio. i have no experiance in rf analog ic design. i have read a lot of book like "rf microelectr

## Simulating gilbert cell mixer layout

I have used ADS to compute the conversion gain, 1dB compression point, noise figure and IP3. but when i tried to compute IP3 i face some problem. the problem is at my IF freq my upper and lower intermodulation tone is not identical. mean that at frequency (2F1-F2)-LO and (2F2-F1)-LO dont have the same amplitude. so if i compute IP3 using upper side

## RFIC and 50 Ohm matching

Hello, In RFIC, there is no need for 50 Ohm matching since the distance between the source and the load is small compared to the wavelength. this implies that there is no need for matching inside the RFIC. So now the output impedances and input impedances are not 50 Ohm (for example, input impedance of Mixer or output impedance of LNA). so ho

## What does characterization mean?

If you had obtain the Intermodulation Intercept Point, Noise Figure and Gain/Loss of the various analog block within your design then from which you can then calculate the overall system noise figure and iip3. You could find the detail calculation example in Razzavi's RF IC Design.

## Can anyone tell me something about harmonic balance?

in cadence, you should choose PSS simulation which is similar compared to HB simulation with different calculate method(time domain), and it will cost more simulation time.

## How to simulate for mixer iip2 using spectreRF?

you should not choose (flo - (f1 + or - f2) as the second harmonic the iip2 frequency should be (f1- f2), i think you can detect the power of (f1- f2) at the if port .and calculate the iip2 use the formula "IIP2=Pin+(Pfund,out-p(f1- f2),out)" .Pfund,out is the power at IF port with the Pin in the RF port ,and p(f1- f2),out is the outout power at

## Steps for making a LNA with 1420 MHz, noise factor of 0.5 db and gain above 20 db

as far as i know all the real transistors are bilateral , coz the s12 is finite and have small valuse , which effect the design , but in some cases the transistor assumed to be unilateral to simplfy the hand calculation but u hvae the simulators , so u can work with bilateral , and make the simulator calculate everything but u need to know ,

## CMOS down conversion mixer

yeah.......I have gone through all those books...what my problem is.....while designing any circuit,generally we try to relate the specs and from those we calculate the required bias voltages and widths of the transistors.......how to ralate the same in the mixer as noise figure and 1 dB compression point and others we can not directly formulate..

i think u can replace the Iand Q with single path just to calculate the total NF , gain , and iip3 then apply the result to I and Q khouly

## Testing the receiver of transceiver chip.

I think you can make a couple of things. First, you surely need an RF signal generator that you haven't mentioned. Applying an in band CW (slightly offset respect to LO) tone to the LNA, you can acquire the ADC output (a logic analyzer is OK for that) and do the math to see the output spectrum, so you can calculate the gain, linearity, passban

## Is IP3 always 10dB higher than P1dB?

10dB rule only applies when the power coefficient is constant, which is roughly true in block with single transistor and without feedback. In more complicated case, the difference is usually larger. By the way, iip3 is a virtual number (intecept point of fundamental and 3rd order curves extrapolated from linear region); it indicates how linear is