1000 Threads found on edaboard.com: Biasing Inductor
Due to gain-bandwidth product limitation for any amplifier it is usually easier to reduce gain in lower frequencies than increase it on high frequency end in order to get flat response. Different measures can be used: smaller series capacitor(s) at input and output circuits, adjusting biasing inductor(s), designing high-pass matching circuit etc. D
RF, Microwave, Antennas and Optics :: 08-03-2007 03:59 :: RF-OM :: Replies: 1 :: Views: 836
I want to simulate an inductor and expect to get S-parameter of out of it. I want to simulate it with a particular DC biasing, let say 20 mA. Can this be done in HFSS? Which excitation should I use.
Electromagnetic Design and Simulation :: 01-27-2005 08:50 :: wlcsp :: Replies: 0 :: Views: 914
Can u all tell me how to deside the value of RFC chock/inductor( depending on freq. band and current) that we r using for biasing for any PA,LNA. i am confuse.
Analog Circuit Design :: 07-01-2006 01:19 :: tomhive :: Replies: 1 :: Views: 1292
For DC biasing for power amplifiers or diode switches, inductors are often used as RF choke.
How do we decide the value of inductor to use for the RF choke?
RF, Microwave, Antennas and Optics :: 09-26-2006 11:05 :: ckJJ :: Replies: 5 :: Views: 3439
Give more informations about the used Mosfet, Drain current? package type? datasheet?Is there any spice model of this mosfet? To get some informations.
There is no simple biasing network unfortunately.
But you can start with : 1nH inductor 10nF & 10uF shunt bypass capacitors.
7pF coupling capacitors.
Should be ok at 1 GHz.
RF, Microwave, Antennas and Optics :: 04-11-2010 13:05 :: jayce3390 :: Replies: 4 :: Views: 907
I used ac simulation to find my inductance and Q factor..I will recheck the s-p analysis later.
There is another problem....I implemented a cascode active is meeting my specs....Now i have to implement tunability...What do you suggest is d best way...i'm thinking of changing the bias my g
RF, Microwave, Antennas and Optics :: 09-21-2012 22:28 :: mustangyhz :: Replies: 9 :: Views: 2244
Can a Ferrite bead be used as RF Choke instead of inductor being used as RF Choke in LNA biasing circuit. attached is the application circuit
RF, Microwave, Antennas and Optics :: 08-04-2010 03:20 :: ah.vinod :: Replies: 1 :: Views: 1022
It's just for biasing purpose which is very necessary when the supply voltage of vdd and ground. In this manner the dc voltage of all ports of opamp is vcm.
Analog Circuit Design :: 03-22-2011 05:46 :: Milad-D :: Replies: 2 :: Views: 694
The Rbias is used in order not to make the signal quantity flow through the biasing network so that the full signal gets appeared at the gate/base of the transistor.Usually the value of Rbias is high so that it provides a high impedance path to signals.
Hope it helps
RF, Microwave, Antennas and Optics :: 06-21-2011 20:00 :: santom :: Replies: 3 :: Views: 1233
Thanks guys for helping.
I have seen that option , but if I change the layout , that is by dragging , will MWO simulate the schematic (keeping in mind the layout) because if I introduce a bend say for instance, inductance is introduced.
Secondly, my circuit has a dc bias, I am biasing a diode via choke (which will be transmission line based) and
RF, Microwave, Antennas and Optics :: 05-05-2011 20:48 :: MobiNaz :: Replies: 6 :: Views: 1241
I am working on a reconfigurable decoupling and matching network. To make it reconfigurable i need to use varactor diodes ,which will help me tune uptmy network from uplink to downlink frequencies. I need to know how can i model and achieve biasing of these varactor diodes. Using skyworks 2019-2023 hyper abrupt varactor diodes.
Electromagnetic Design and Simulation :: 01-08-2013 19:01 :: nabeel71 :: Replies: 5 :: Views: 493
i am designing VCO circuit using 45nm tech
i found VCO topology in one paper with W/L ratio of FETS and inductor value (2.4nH) for 180nm tech given in that paper
mosfet W/L ratio is cal by keeping L as 45nm
my question is how to scale inductor value for 45 nm tech
thanks in advance
Digital Signal Processing :: 12-13-2013 17:04 :: micpro :: Replies: 1 :: Views: 336
Who have experience in planar inductor design on standard microstrip (not mmic) substrates?
RF, Microwave, Antennas and Optics :: 06-28-2001 16:45 :: HMX :: Replies: 7 :: Views: 4205
Can anyone tell me where I can find any writing or formula or equation about
PLANAR inductors ?
I have a pcb with a planar inductor and I want to calculate the inductance of it.
the PCB is single Layer and the shape of it is like this :
Can anyone Help me?
RF, Microwave, Antennas and Optics :: 07-23-2001 01:48 :: tiger2000 :: Replies: 13 :: Views: 9216
Has any one a tool to synthesize planar mutally coupled inductor?
I need this configuration to design a 7-13 GHz balun on GaAs.
I could analyze the inductors with MWO EM-Simulator, but I would like to avoid a trial and error synthesys without having a good starting point for dimensions, space, number of turns and width of the microstrips.
Other Design :: 05-08-2002 11:16 :: Tomp :: Replies: 3 :: Views: 2701
Check Maxim also. the only thing you have to do is matching impedances at input and output, and insert an inductor to biasing the Chip.
But be careful, normally high frecuency amlpifiers are made for a single frecuency, or a limited range of frecuencies, because they are frecuency compensated to avoid unstabilities
Professional Hardware and Electronics Design :: 05-17-2002 03:56 :: algilsan :: Replies: 2 :: Views: 940
I am looking for a low noise inverter chip (8pins) to generate the negative voltage for biasing GaAs Fet's gate.
I tried the Maxim and Linear Technology chips. They performed good but they did'nt accomplish with the temperature range requiride.
Does somebody suggest me some other manufacturer?
Thanks in advance
Other Design :: 07-10-2002 21:01 :: nandopg :: Replies: 2 :: Views: 2058
I want a build a inductor for high frequency and i don't have a measuring device only i have a multimeter i can build a circuit where i can see how is the measure of one inductor in high frequency, somebody have a circuit??? :?
Professional Hardware and Electronics Design :: 07-29-2002 20:41 :: ironjaycuttler :: Replies: 9 :: Views: 1561
i need 1mH - 3mH inductor with low DC resistance . approximatly it should be below 1.5 ohms. If anyone know where it is available please let me know asap. its very urgent.
Professional Hardware and Electronics Design :: 09-14-2002 09:00 :: niks :: Replies: 5 :: Views: 4587
I need to design an inductor with following specifications:
Can anyone suggest a good matrial /core shape and design?
RF, Microwave, Antennas and Optics :: 11-29-2002 12:13 :: billano786 :: Replies: 12 :: Views: 2051
I am looking for a certain paper about spiral inductor.
I have ever heard other people talking about that, the content is about
using multi-layer metal to form a 3-D inductor.
What is special about this paper is that the each turn of the inductor,in this paper, goes in different metal layer. For example
RF, Microwave, Antennas and Optics :: 12-31-2002 07:50 :: mike_bihan :: Replies: 3 :: Views: 1128
Recently I got some problem about 'spiral inductor modelling'.
After obtaining S-parameters from network analyzer, we had to translate it into some kind of equivalent circuit to simulate it in hspice. Some methods of annealing were used for this process. Since there will be many sets of resolutions during the process o
RF, Microwave, Antennas and Optics :: 01-22-2003 11:45 :: mike_bihan :: Replies: 1 :: Views: 1042
About extracting on-chip spiral inductor parameters from measurement!
Any one can share me with the experience of extracting spiral-inductor equivelent from S-parameter?
The case is : After obtaining S-parameter of On-chip CMOS Spiral inductor from measurement, the pad extraction should be done to obtain the accurate result. Then the (...)
RF, Microwave, Antennas and Optics :: 01-25-2003 09:47 :: mike_bihan :: Replies: 3 :: Views: 1678
Anyone have infornation about RF transister biasing? Especially, class B,C.
RF, Microwave, Antennas and Optics :: 02-10-2003 00:18 :: boy :: Replies: 4 :: Views: 1882
How can calculate spiral coil on PCB ?
PCB Routing Schematic Layout software and Simulation :: 02-13-2003 05:31 :: myasar :: Replies: 5 :: Views: 6093
I want to know how accurate is HFSS to help me guess the value and quality factor of a planar spiral inductor on silicon (integrated circuit).
I want to know if, based on the layers description (insulators, metals and silicon) HFSS is able to simulate losses and give to me an accurate set of S parameters.
Thanks a lot
RF, Microwave, Antennas and Optics :: 02-22-2003 14:56 :: Humungus :: Replies: 8 :: Views: 3282
: Need plugins of Ansoft HFSS to compute Q of spiral inductor, can any people offer hand?
Electromagnetic Design and Simulation :: 02-25-2003 10:20 :: mike_bihan :: Replies: 4 :: Views: 1908
Anyone know which EM tool can precisely predict CMOS spiral inductor Q and model ? Where can find the example or document ?
Electromagnetic Design and Simulation :: 02-26-2003 06:21 :: cswang :: Replies: 4 :: Views: 3381
Anyone knows link for spiral inductor model for HSpice, thanks
Professional Hardware and Electronics Design :: 03-10-2003 16:40 :: dd2001 :: Replies: 0 :: Views: 726
I want to design an inductor working around 2 KHz of 160uH. Going by exprience of you peolple what is the maximum value of Q factor that can be obtained practically?
Professional Hardware and Electronics Design :: 03-23-2003 12:11 :: billano786 :: Replies: 8 :: Views: 1224
How can I calculate the Q factor of non-symmetric 2-port inductor from the S-parameter information ?
RF, Microwave, Antennas and Optics :: 06-11-2003 04:35 :: junction_crosstalk :: Replies: 4 :: Views: 3079
i want inductor with folowin specs-
- SMD small size
- Larger value i want from 1mH - 30mH
- LOW DCR (this is very imp for me)
- good curent carryin capacity
Professional Hardware and Electronics Design :: 06-27-2003 01:35 :: niks :: Replies: 2 :: Views: 660
i have came across the Q factor for inductor.
1.)how about finding the Varactor Q and value? The varactor is either pn-diod or mos-cap.
2.)how the measure the s-parameters of the varactor?
RF, Microwave, Antennas and Optics :: 06-28-2003 09:24 :: RC13 :: Replies: 2 :: Views: 1554
Active biasing is often used in rf power amplifiers where emitter or source is grounded. Such amplifiers are usually dissipating heat. To improve temperature stability negative dc feedback is used to keep average collector (drain) current constant. Feedback is usually made with PNP transistor.
RF, Microwave, Antennas and Optics :: 10-14-2003 22:26 :: Borber :: Replies: 6 :: Views: 2727
Hello, I want to realize a 3-order lowpass filter on chip. F cut @ 20GHz
A series inductor should be used.
I'm not sure that spiral inductor will have a good performance near that freq. And series transmission line is difficult to realize.
Can I make the trans line as
or use CPW?
Which structure( spir
RF, Microwave, Antennas and Optics :: 07-05-2003 00:57 :: yorkyong :: Replies: 2 :: Views: 1005
biasing mixer is possible only with mixers that have DC and above IF output. Applaying DC bias to IF port can improve isolation if needed. Such a mixer can be used allso as an AM modulator for example for TV video modulation.
RF, Microwave, Antennas and Optics :: 10-13-2003 06:57 :: Borber :: Replies: 7 :: Views: 2855
Does onyone has a publication which has the exact dimensions of a microstrip rectangular spiral inductor?I want to simulate it for a project i have but i have not the exact dimensions.I want to point out for another time that i want a microstrip spiaral inductor.
thank you for your help
Electromagnetic Design and Simulation :: 10-05-2003 14:13 :: peter-gr :: Replies: 2 :: Views: 2415
Can anybody tell me how to design a coplanar spiral inductor on Si, without ground plan on the beneath side of the Si chip.
Is there an equation for a raw design?
RF, Microwave, Antennas and Optics :: 10-17-2003 13:47 :: yzriver :: Replies: 0 :: Views: 869
anyone who have experience modeling spiral inductor?cmos technologies
i have read a lot of papers,have used 2-pi&1-pi model,but the result is so poor...
who can give me some valuable advice on it,thanks a lot
RF, Microwave, Antennas and Optics :: 11-05-2003 03:09 :: pigkiller :: Replies: 30 :: Views: 4943
i want to know what is the best EM simulator to simulate the spiral inductor on sillicon substrate accuratly
Electromagnetic Design and Simulation :: 11-06-2003 00:51 :: khouly :: Replies: 12 :: Views: 4342
how to simulate quality factor of an spiral inductor in ADS?please
RF, Microwave, Antennas and Optics :: 11-14-2003 03:12 :: xlgic :: Replies: 2 :: Views: 2581
I tried to draw a layout of spiral inductor in virtuoso, it is not recoganized as an inductor. Do I need any other tools? or did I make any mistakes? thanks!
RF, Microwave, Antennas and Optics :: 12-04-2003 12:25 :: viviana :: Replies: 12 :: Views: 7738
I need to design meander line inductor(microstrip line).But I don"t know how to design.
I don"n know what software can help me.Please help me.
RF, Microwave, Antennas and Optics :: 12-16-2003 06:57 :: MSH :: Replies: 3 :: Views: 4406
I am leanring ADS.
Does anyone know about simulating spiral inductor with ADS ??
Electromagnetic Design and Simulation :: 12-22-2003 03:14 :: myem :: Replies: 3 :: Views: 2569
You can refer attached paper using lumped element as biasing instead of radial stub
RF, Microwave, Antennas and Optics :: 01-09-2004 23:50 :: activewei :: Replies: 6 :: Views: 2562
Does anyone knows how to design a biasing voltage reference circuit with enable/disable function in CMOS?
Normal stable biasing reference point are generated from a chain of equal size PMOS loads. How can we improved this with a enable/disable circuitary which is stable in process and temperature variations? :?:
Analog Circuit Design :: 02-18-2004 00:37 :: wylee :: Replies: 6 :: Views: 2181
I am using a bjt for LNA designing .Which biasing network is most suitable to achieve minimum NF and K>1.
RF, Microwave, Antennas and Optics :: 02-26-2004 01:18 :: ahmer saeed :: Replies: 3 :: Views: 929
what is phemt?what is the biasing condition of phemt?Is its biasing condition is same as N channel FET?
RF, Microwave, Antennas and Optics :: 03-09-2004 06:15 :: ahmer saeed :: Replies: 6 :: Views: 2043
Hi all I wonder where I can find an inductor to be used as RFC at 10Ghz ?
RF, Microwave, Antennas and Optics :: 03-22-2004 04:11 :: StoppTidigare :: Replies: 10 :: Views: 1422
What is the more used planar inductor simulator? I have heard about m-a-g-n-e-t, s-o-n-n-e-t , asitic, fasthenry but not all of them are designed to simulate CMOS structures.
Any comment about these simulators?
RF, Microwave, Antennas and Optics :: 03-26-2004 13:31 :: nafraf :: Replies: 1 :: Views: 954