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1000 Threads found on edaboard.com: Solid Angle
Just my rule of thumb: Other considerations apart, one with a total track length - less is better. Other things being similar: one with fewer vias - less is better. One with split ground plane - worse than one solid One with all components 0, 90 or 45 degree aligned -better than one at different angles Layout nicely labeled on the silk screen
I'm wondering how solid state device will operate at -200C ?? There must be some special materials for that ..
Hello. What is the role of RB resistor here? I know that the -Vbb biases the transistor below cutoff but I am wondering what's RB's function? Can I just remove that? Thanks. 159520
Power electronics is the application of solid-state electronics to the control and conversion of electric power. The first high power electronic devices were mercury-arc valves. In modern systems, the conversion is performed with semiconductor switching devices such as diodes, thyristors, and power transistors such as the power MOSFET and IGBT.
Here is my power oscillator along with a simple AM modulator I have found in an old book (uses Be BJTs for tube cathode modulation). But I wonder, will a power mosfet suit better as a modulator as far as concern fewer components count? Will I be able to modulate it on a single stage (line source) with something like this https://diyaudioprojec
Hi Can you explain why the number of resonance frequency in SRR(split-ring resonator) more than a Ring without a slot? Thanks in advance
Hello All, I did an optimization in matlab for a function that describes the transmission coefficient of a 3 layered dialectric stucture with different width for each layer. My optimization goes through interval of and for every phase (360 points) give the corresponding widths for maximum transmissiom at that phase angle. After sim
Hi, I am working on a grid-connected converter. I need a 3-phase PLL. I prefer not to implement it through software. I would be grateful if you introduce me a 3-phase PLL chip with low noise susceptibility; if it is available and you are aware of. I found a couple of single-phase PLL, but not a 3-phase one. Thanks,
I tried to start designing a Class C power amplifier at 5 GHz (for any vlaues of gain and output power) I used TSMC 180 nm technology. I build the following circuit to test some concepts 158960 I found that the max available gain is in -dB (Attenuator) also when I modified the terminals' impedances as shown in the circ
I'm working on reflectarray antenna design. I'm considering offset feed angle of horn such as 15 deg and 30 deg. What must be the values of Xmin, Xmax, Ymin, Ymax, Zmin and Zmax in the boundary conditions? Also, considering symmetry planes, how must they be set? When should we set 'Open Add Space' to all XYZ values? I manually set the polarizati
The initial incident angle between the feeding horn and the reflectarray antenna is zero degree. For array simulation, waveguide port is used while for unit cell, Floquet port is used. In waveguide port modelling, we click the Port and manually set the polarization angle. However, in the Floquet port, during the unit cell design, how to set the pol
50 ohms is only for transmission line connections of that characteristic impedance. You may need it at the front, if that's how the signal come in and you may need it at the back, if that's where it's going. But on a short-haul PCB at frequencies an IC op amp can work properly at, there's no reason to burden the signal and its source otherwise.
My major at college started out in mechanical and aerospace engineering. I remember I was never eager to solve statics exercises --the kind that went 'Calculate horizontal and vertical vectors of force applied to a tree by one end of a hammock containing an individual weighing 200 pounds.' My mind was drawn more to things in motion, interacting,
Hello, I'm working on Proteus to build SCR triggering circuit and then put some example loads; like, a motor. I actually don't have a deep understanding of power electronics, I know they are used to big electronic control; like controlling heavy machines that need variable AC voltage. Of course there are a lot of other applications; they
From the below link, it appears that when an alu elec cap fails due to electrolyte drying out?it fails open circuit, which is in some ways harmless?..and so what we can do, is simply put a few solid polymer capacitors in with the capacitor bank, so that when the alu elec's fail open, then the solid polymer ones will be there to give some support?.d
Hi, We want to use solid polymer electrolytic capacitors in our 12kW electric drone power supply, for longevity. But we hear they are more susceptible to vibration damage than wet electrolytics. However, if we use a radial leaded solid polymer type, then surely the leads would ?cushion? the vibration such that the solid polymer (...)
i found this equation for calculating transmitter power output on the internet, volts times amps times cosine phase angle between voltage and current. would an engineer actually use this equation?
Hi, There is no solid GND plane on the microcontroller board. Then HF nearby ...malfunction is quite expectable. --> Use one layer for GND only. No cuts, no other traces. Then try again. Klaus
Hi, Many (most) members in this forum don't use a GND plane at all. Some of them think copper_pour can replace a GND plane. I don't recommend both. In most circuits a single, but solid GND plane (one layer GND without splits and without other signal's traces) is sufficient. Now you use two GND planes. In some cases two GND plane bring a ben
Hi, could somebody tell me what exactly the outcome of an RCS-simulation, as shown in the attached pic, is. I guess it is the RCS value, seen by a radar looking at a certain angle to the object. In the attached example, RCS values are high for Theta~30deg and low for boresight or Theta>50deg. The object will be quite invisible (undetectable) fo