BigBoss
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20th May 2019, 03:27BigBoss replied to a thread Altium 18 DRC unrouted net BUG! in PCB Routing Schematic Layout software and SimulationAltium 18 has plenty of bugs..That's why they have released 19. Experienced PCB Designers are still using Altium 17.3 replies | 342 view(s)
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17th May 2019, 15:06BigBoss replied to a thread Matching 75ohm antenna to 300ohm receiver in RF, Microwave, Antennas and OpticsOpen Dipole Antenna has approx. 300 Ohm Impedance but there is a Balun in the TV Connector5 replies | 784 view(s)
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17th May 2019, 15:04BigBoss replied to a thread RF Amplifier Performance Characteristic in RF, Microwave, Antennas and OpticsHow do you know that ?? If an amplifier produces harmonics, so there are some unwanted errors.. -Bias point is wrong -Load condition is too low or...4 replies | 622 view(s)
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15th May 2019, 21:35Because you're using Behavioral Elements so their Frequency Responses are constant and flat for any frequency..1 replies | 105 view(s)
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14th May 2019, 23:04BigBoss replied to a thread Help for my Collpits oscillator circuit in RF, Microwave, Antennas and OpticsLook at this layout, does it look like to yours ??11 replies | 1074 view(s)
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14th May 2019, 22:57BigBoss replied to a thread New Project! Looking for suggestions with spectrum analyzers in Digital communicationConverting 18-40 GHz needs also precise RF systems, not so easy. You cannot find anything around 300 $ even to convert 18-40GHz into lower...3 replies | 190 view(s)
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14th May 2019, 16:31BigBoss replied to a thread Help for my Collpits oscillator circuit in RF, Microwave, Antennas and OpticsThe problem is your layout.. It's too bad for an oscillator.Components should be SMD, the distances between the components must be short as much...11 replies | 1074 view(s)
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12th May 2019, 14:02BigBoss replied to a thread RF Amplifier Performance Characteristic in RF, Microwave, Antennas and OpticsThe one of the most important specification of an PA is Linearity. If you drive the amplifier to where the amplifier works at nonlinear region, it...4 replies | 622 view(s)
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11th May 2019, 23:40BigBoss replied to a thread ADS:Error while adding bat54 component in ads layout from HFDiode library in Electromagnetic Design and SimulationThe message is clear.. The layer which is used for landing of that component is not valid.Change the layer with a valid one, error will be...4 replies | 822 view(s)
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10th May 2019, 04:40BigBoss replied to a thread cadence simulation without schematic view... in Analog Integrated Circuit (IC) Design, Layout and FabricationCreate a Config View of the Design.The Config View will partition the circuit blocks with different and available views then you can change "the...2 replies | 598 view(s)
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8th May 2019, 18:24BigBoss replied to a thread Allegro to Altium Conversion in PCB Routing Schematic Layout software and SimulationDo you want me to convert this .brd file to ODBC++ ?3 replies | 736 view(s)
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8th May 2019, 16:36BigBoss replied to a thread Allegro to Altium Conversion in PCB Routing Schematic Layout software and SimulationFirst, this has been drawn with very old version. 15.X..It may be a problem.. Second, I can export into some different format like ODBC++ or IPC...3 replies | 736 view(s)
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8th May 2019, 04:13BigBoss replied to a thread ADS:Error while adding bat54 component in ads layout from HFDiode library in Electromagnetic Design and SimulationChange the Units in Technology Library..If it's mils, change it as mm etc.4 replies | 822 view(s)
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7th May 2019, 10:51BigBoss replied to a thread Need help understanding an LNA design method in RF, Microwave, Antennas and OpticsI think R5=5 Ohm represents the Internal resistance of the Battery for that they aim, but C2=0.1uF is not very meaningful for s-parameter simulations...11 replies | 1202 view(s)
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6th May 2019, 09:41BigBoss replied to a thread What is Real GND in high frequency IC design？ in RF, Microwave, Antennas and OpticsThat Bondwire might be very serious trouble @ 70GHz..If you use a IV Foundry, doesn't it have a Backside VIA ??5 replies | 255 view(s)
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5th May 2019, 19:23You can find lot of information about Transmission Lines here.. https://www.ece.rutgers.edu/~orfanidi/ewa/ Also, there are tons of paper about...4 replies | 966 view(s)
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5th May 2019, 15:00BigBoss replied to a thread How to get nonlinear model for rd01mus mosfet rf amplifier? in RF, Microwave, Antennas and OpticsI guess you can request ADS/AWR Model. Look at Notes at ---> http://www.mitsubishielectric.com/semiconductors/products/hf/sirfpowermod/index.html1 replies | 152 view(s)
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5th May 2019, 14:501-When you analysis the circuit with Short Circuit Conditions, Y-Parameters are useful. 2-Balun Circuits can be driven ODD Mode or EVEN Mode e.g....4 replies | 966 view(s)
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5th May 2019, 14:41BigBoss replied to a thread Input and output impedances of transmission line in RF, Microwave, Antennas and OpticsStart to sweep the length from 0 to 180 degree, you'll observe that when the TL's length arrives to 90 degree, the real axis will show you 25 Ohm.3 replies | 777 view(s)
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3rd May 2019, 14:17As I have seen, the Comparison Frequency OR Divided VCO Frequency is Swinging around so Phases are coincident but swinging to left and right. I...2 replies | 587 view(s)
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3rd May 2019, 08:28BigBoss replied to a thread [SOLVED] Small signal gain (S21) of Peaking stage of doherty power amplifier in Analog Circuit DesignNormal..Because C-Class Amplifier is biased lower than Vbe treshold so Ic=0 then Gain=-.. dB. In order to check the Power Gain of an C-Class...2 replies | 179 view(s)
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2nd May 2019, 21:16BigBoss replied to a thread Algebraic System Response Equation into Circuit Design in Mathematics and PhysicsFundamental Math. Functions such as SQRT, MUL, DERIV etc.can be converted onto Circuits.Complex ones can also be realized with DSPs. FPGAs can also...2 replies | 666 view(s)
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2nd May 2019, 14:00A valuable paper on Balun Design.. http://www.jpier.org/PIER/pier134/10.12100809.pdf7 replies | 1562 view(s)
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1st May 2019, 09:43BigBoss replied to a thread Generating dummy transistors and resisors in Cadence Vertuoso in Analog Integrated Circuit (IC) Design, Layout and FabricationCopy the actual devices in the schematic without any connection then place them in layout. You can make them all pins are short circuited and they...4 replies | 2132 view(s)
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30th April 2019, 05:49BigBoss replied to a thread How do we get Sparamter results with "term" used as input-output in ADS in Analog Circuit DesignIf your hypothesis is correct, this circuit should have been simulated by ADS but gives an error.. Any circuit which the Sources are not...15 replies | 2594 view(s)
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30th April 2019, 04:44BigBoss replied to a thread How do we get Sparamter results with "term" used as input-output in ADS in Analog Circuit DesignAll Linear Time Invariant Circuits in this universe ( passive,active,linear or nonlinear) must satisfy this equation below. Simulators use these...15 replies | 2594 view(s)
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29th April 2019, 22:33BigBoss replied to a thread How do we get Sparamter results with "term" used as input-output in ADS in Analog Circuit DesignS-parameter simulation is a subset/kind of AC Simulation so there is a very low level stimulus but hidden.Otherwise simulation will not run without...15 replies | 2594 view(s)
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29th April 2019, 22:28BigBoss replied to a thread Problem with ads port configurations in PCB Routing Schematic Layout software and SimulationYes, that's right.. Otherwise there is no sense at all to place the VIAS right ?? ADS Momentum presumes the GND Layer is infinite,ideal and...3 replies | 902 view(s)
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29th April 2019, 15:46BigBoss replied to a thread Problem with ads port configurations in PCB Routing Schematic Layout software and SimulationADS warns you about the thickness of the substrate because there is a hidden GND Port just underneath the real Port. If the electrical length that...3 replies | 902 view(s)
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29th April 2019, 15:40BigBoss replied to a thread How do we get Sparamter results with "term" used as input-output in ADS in Analog Circuit DesignADS stimulate the circuit with a very low signal level by default s-parameter definition even there is no field for signal spec..That's it you don't...15 replies | 2594 view(s)
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