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28 Threads found on edaboard.com: **Calculate iip3**

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

Analog IC Design and Layout :: 08.11.2010 05:06 :: nooshiin :: Replies: **5** :: Views: **1106**

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?

RF, Microwave, Antennas and Optics :: 08.08.2005 00:04 :: hr_rezaee :: Replies: **3** :: Views: **963**

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 (...)

RF, Microwave, Antennas and Optics :: 08.06.2007 21:52 :: fxxjssc :: Replies: **1** :: Views: **6474**

RF, Microwave, Antennas and Optics :: 09.12.2007 07:19 :: khouly :: Replies: **3** :: Views: **2323**

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

Analog Circuit Design :: 08.11.2010 05:22 :: nooshiin :: Replies: **1** :: Views: **2587**

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.

RF, Microwave, Antennas and Optics :: 10.11.2009 08:06 :: BigBoss :: Replies: **2** :: Views: **760**

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

RF, Microwave, Antennas and Optics :: 27.02.2010 06:53 :: alizadeharand :: Replies: **11** :: Views: **2081**

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

Analog IC Design and Layout :: 25.02.2012 06:24 :: dishasoni :: Replies: **0** :: Views: **489**

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.

RF, Microwave, Antennas and Optics :: 12.08.2005 00:29 :: vfone :: Replies: **4** :: Views: **949**

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

RF, Microwave, Antennas and Optics :: 03.12.2005 04:21 :: Mazz :: Replies: **2** :: Views: **1079**

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

Analog IC Design and Layout :: 13.05.2006 11:57 :: gunturikishore :: Replies: **5** :: Views: **1000**

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

RF, Microwave, Antennas and Optics :: 25.08.2006 06:00 :: ghadahamdy :: Replies: **2** :: Views: **889**

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,

RF, Microwave, Antennas and Optics :: 05.01.2007 19:03 :: rosaeidi :: Replies: **2** :: Views: **1544**

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?

RF, Microwave, Antennas and Optics :: 06.06.2008 22:26 :: zhangjavier :: Replies: **2** :: Views: **589**

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

RF, Microwave, Antennas and Optics :: 07.07.2008 08:51 :: fanshuo :: Replies: **7** :: Views: **766**

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

Analog Circuit Design :: 28.09.2011 09:39 :: David.D :: Replies: **1** :: Views: **569**

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

RF, Microwave, Antennas and Optics :: 27.02.2012 06:51 :: dishasoni :: Replies: **1** :: Views: **334**

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

Analog Circuit Design :: 02.03.2013 13:04 :: Bellerophon :: Replies: **0** :: Views: **195**

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

RF, Microwave, Antennas and Optics :: 08.12.2004 14:07 :: abdoeng :: Replies: **6** :: Views: **1673**

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

RF, Microwave, Antennas and Optics :: 12.12.2004 00:37 :: dsjomo :: Replies: **2** :: Views: **666**

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

Analog IC Design and Layout :: 10.02.2005 06:33 :: terryssw :: Replies: **8** :: Views: **6461**

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?

RF, Microwave, Antennas and Optics :: 17.05.2005 10:39 :: yolande_yj :: Replies: **4** :: Views: **835**

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

Analog Circuit Design :: 01.06.2005 08:52 :: ezt :: Replies: **5** :: Views: **1439**

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.

Analog Circuit Design :: 08.05.2006 00:43 :: wchu01 :: Replies: **1** :: Views: **626**

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

RF, Microwave, Antennas and Optics :: 04.02.2008 02:40 :: khouly :: Replies: **13** :: Views: **1868**

dear all
i have some questions about RF mixer.
1. We can find the conversion gain for mixer by using
a. voltage gain
b. power gain
c. S21 parameter ( forward gain versus frequency)
Actually what is the differrence from these three gain?
2. To find linearity of the mixer, normally we **calculate** the **iip3**. We will set two-tone frequeny,

RF, Microwave, Antennas and Optics :: 03.06.2010 21:52 :: surianova :: Replies: **1** :: Views: **555**

Dear all:
The switched capacitor integrator is as following. how to test the linearity of the integrator? I am considering to do it in following way.
1) Input is a pure sin wave, the do pss+pac, then **calculate** the **iip3**
2) input is a pure sin wave, the output is a stair-case sin wave, then sample the output and do DFT the watch the HD3.

Analog Circuit Design :: 13.08.2011 00:07 :: sharezhao :: Replies: **5** :: Views: **621**

Hi,
I read the following link on IP3 calculation:
There are three stages (stage 1 and stage 3 are amp while stage 2 is bandpass filter) which has the OIP3 and gain respectively:
OIP3 +21dBm(125.9) inf dBm(inf) +25 dBm(316.2)
Gain 15 dB (31.62) -3 dB

RF, Microwave, Antennas and Optics :: 11.02.2013 13:30 :: Element_115 :: Replies: **1** :: Views: **1723**

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