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Type: Posts; User: BigBoss

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1. ## Thread: average value of as square wave

by BigBoss
Replies
6
Views
203

### Closed: Re: average value of as square wave

Vmean=Vpeak*(thau/Period)

thau:duty cycle
2. ## Thread: Plotting of VCO output power vs frequency in cadence spectre

by BigBoss
Replies
3
Views
178

### Closed: Re: Plotting of VCO output power vs frequency in cadence spectre

Sweep Vtune and look at Vout in dBm for first harmonic ( or whatsoever..) ..very simple.
3. ## Thread: Microstrip to layout in ADS for power amplifier design

by BigBoss
Replies
14
Views
592

### Closed: Re: Microstrip to layout in ADS for power amplifier design

I said that use PDK of Cree, not model standalone..
There will be DRC rules,LVS rules,and other stuffs such as VIAs,Transmission Lines,Resistors,Capacitors, etc. therefore PDK is a must..Otherwise...
4. ## Thread: When to connect RF Bypass capacitor, and a Resistor in place of RF choke?

by BigBoss
Replies
1
Views
162

### Closed: Re: When to connect RF Bypass capacitor, and a Resistor in place of RF choke?

Depends on the frequency of operation.
Resistors can be used because SRF of the Coils are very close or exceeds it.This is valid for capacitors too..
Coil can be part of matching circuit.. It's an...
5. ## Thread: how to get higher P1dB,in point

by BigBoss
Replies
2
Views
196

### Closed: Re: how to get higher P1dB,in point

It depends on the nonlinearity of the active device.Increasing bias current or playing with load gives a you a headroom to play in but it's not exact solution.
For instance, if an active device has...
6. ## Thread: Microstrip to layout in ADS for power amplifier design

by BigBoss
Replies
14
Views
592

### Closed: Re: Microstrip to layout in ADS for power amplifier design

Will you send your design to Cree to make manufacture ?? If it's so, you have to use PDK of Cree otherwise it doesn't make sense to place a layout view of active device.
Place PINs for DGSS...
7. ## Thread: Microstrip to layout in ADS for power amplifier design

by BigBoss
Replies
14
Views
592

### Closed: Re: Microstrip to layout in ADS for power amplifier design

There is nothing to be explained more... Simply place a PIN in schematic view and move on..You can place you layout element in layout view between those PINs later on..
Or simply leave unconnected.....
8. ## Thread: Microstrip to layout in ADS for power amplifier design

by BigBoss
Replies
14
Views
592

### Closed: Re: Microstrip to layout in ADS for power amplifier design

If I understand you correctly, you would use a component/transistor/other element later on but you want to place its place in schematic now.. right ??
In order to do this, you don't have to place...
9. ## Thread: Bridge diode thermal problem

by BigBoss
Replies
10
Views
620

### Closed: Re: Bridge diode thermal problem

RS605M is not an appropriate choice for this kind of application.It's used in HV applications rather than Low Voltage/High Current.
2200uF/per Amper is a good rule of thumb for 50Hz applications.But...
10. ## Thread: Need documets related to extraction of Inductance using Cadence Assura

by BigBoss
Replies
4
Views
436

### Closed: Re: Need documets related to extraction of Inductance using Cadence Assura

Inductance extraction of Assura is not so accurate.You'd better use an EM simulator..
11. ## Thread: How the stability analysis in analog and RF design related?

by BigBoss
Replies
3
Views
297

### Closed: Re: How the stability analysis in analog and RF design related?

NDF ( Normalized Determinant Function ) is a generalized stability measure but it's quite difficult to apply..
However ADS and MWOffice supply NDF test Set-ups for that, it's worth to examine..

by BigBoss
Replies
6
Views
672

### Closed: Re: ADS Filter simulator

I couldn't see your specification but they might be overrated or impossible to realize..
It may also be a bug of ADS.

by BigBoss
Replies
1
Views
268

### Closed: Re: OrCAD PSpice is this a good deal?

It's good deal..You cannot find any pro package less than -1000-1500 \$.
I own Allegro since 1997 and it's pretty good..

by BigBoss
Replies
6
Views
672

### Closed: Re: ADS Filter simulator

What is wrong ??

by BigBoss
Replies
4
Views
252

### Closed: Re: Problem during simulation model MRF13750 in ADS

Did you install prerequisite RF High Power Model Kit ?155797

by BigBoss
Replies
4
Views
252

### Closed: Re: Problem during simulation model MRF13750 in ADS

Did you put the Model Including Block in your schematic ??
17. ## Thread: differential amplifier design using ngspice

by BigBoss
Replies
5
Views
301

### Closed: Re: differential amplifier design using ngspice

Microcap has recently been made public for everyone so it's free without any restriction.It's been used for serious circuit designs by professional engineers now it's free.....

by BigBoss
Replies
3
Views
241

### Closed: Re: Error opening earlier saved file in ADS

Look at the OS compatibility table and decide your OS is supported by you version of ADS or not..
19. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by BigBoss
Replies
12
Views
501

### Closed: Re: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

If OIP3 is 38.91dBm, P1dB is not correct or vice versa. 9.6dB difference should theoretically be between them but this difference is huge..
I don't know what you're doing but there is surely be an...
20. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by BigBoss
Replies
12
Views
501

### Closed: Re: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

Not really.. You can choose same frequency for P1dB too and two plots can be layed down on a same chart..But simulation set-up will be surely different.
21. ## Thread: Capacitance from S parameters

by BigBoss
Replies
4
Views
462

### Closed: Re: Capacitance from S parameters

If you obtained s-parameters, you have to know how to extract Impedance.Since the impedance is known, the capacitance/inductance is also known..
22. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by BigBoss
Replies
12
Views
501

### Closed: Re: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

-There is no such definition "Right IP3".. This specification already varies within Bandwidth in a moderate tolerance..
23. ## Thread: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

by BigBoss
Replies
12
Views
501

### Closed: Re: How to determine tone 1 and tone 2 in ADE IIP3 simulation (hb) for a 60 GHz LNA?

Yes, looks fine..
24. ## Thread: S parameter extraction for MOSFET internal parameters

by BigBoss
Replies
10
Views
607

### Closed: Re: S parameter extraction for MOSFET internal parameters

You do fundamental errors..

-DC OP gives you "static" intrinsic parameters, not dynamic..Briefly it computes intrinsic parameters for given DC OP.
-s-parameters relate the Input and Output to...

by BigBoss
Replies
12
Views
501