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Hello Everyone, I have a NFC system (Reader -> Power Amplifier -> Antenna <-> NFC Tag) in which I can generate a H-field strength from 1.5 A/m to 7.5 A/m. So I would like to know how I can measure the Side-Band Amplitude (SBA) as well as lower sideband (@lsb) and upper sideband (@usb) of the system. Many thanks in
what do we mean when we say "current adds up in phase"? For a wire antenna, there's already a current arises from feed source and it causes antenna to radiate, then why we emphasize 'adds up in phase'. It sounds like we use a second source to increase the radiation. Doesn't it?
Hello, I am trying to apply an adaptive biasing technique to source the differential pair of the fully differential amplifier, the adaptive biasing source a current of let say Ib under small signal condition. Under slewing or large signal behavoiral this current is increased proportionally to the input difference amplitude. My question, I alr
amps will take care of themselves Provided you have enough capability to provide the maximum current you need, that is true. Amps represent the load, all you have to do is make sure the source is capable of producing them safely. If the maximum input to your power supply is 40V you have too much voltage from the transformer and you
I recently set up a group The group was set up to provide a forum for discussion of moderately advanced to advanced antenna research. Typically this will mean from undergraduate research projects in universities to more advanced topics. Here's a Wiki
Thanks Betwixt. I'm not quite sure what do mean by the '+' output to the input '-' . I take the + output is the output from the inverter module but the - input?, is it the negative input of the power rails of the op amps?
I am working with gnss sdr software for processing rf signal captured in file. In gnss sdr software configuration the data source mentions adc sampling rate and type as i and q samples. Nothing is mentioned about IF frequency. Does that mean the intermediate frequency is always zero for I and Q components?
Hi, Please give complete informations. The only useful informations is "30mA" With "earth leakage" I think about AC ... which is alternating. And the value usually is given as amperes RMS. But then you emphase that you want it to be positive and negative. Maybe you want to detect DC currents? Why not use a simple amperemeter? Did you look for
What do you mean thin metal? Your undefined solid sheet doesn't have ANY thickness. You need a real material with some thickness to be able to see changes in transmissions of radiowaves. Or to define the sheet with finite conductivity (how you mentioned above), but this is a kind of theoretical behavior and not real life one.
Hi everyone, I am going to use SMD fuses for protection needs of the electronics. Which way is better, using current rating of: 6A 0603 package SMD fuse or three 2A 0603 package SMD fuses? Using three fuses in parallel instead of one makes more sense to me since; Each one of them will get hot lesser, Since smaller current capacity fuses ha
Thanks, i mean a diode connected anode to output, cathode to input... in the old days, such a diode was always needed to protect the regulator in those cases wherever vout gets bigger than vin.
I have a open loop TF given by 2s+100/s^2. As stated in theory, type 2 system should provide zero steady state error for velocity inputs. Could any body explain the limiting factor of this velocity. I mean, what is the maximum velocity input that this system can track?
I am stauding the MOSFET caharcterstics , May I get a Desgin for a MOSFET based Switch for ON and OFF . with least resistance and maximum current . Where I start ? I can choose any MOSFET so please help me?
Hello, attached is the transient pic of the fully differential amplifier I have designed, if you look to the vo+ and vo- you will see the sparks on it, however the differential coltage is clear due to the subtraction, my question, should I be concirned about the individual outputs or only have to look to the differential output (Vo_diff)
Hi everyone, I have been searching for quite a while about the following subject, but canīt seem to find a decent answer on this. Imagine a 4-layer PCB (Top layer, Mid1 layer, Mid2 layer, Bottom layer). Mid1 layer and Bottom layer are GND panes with here and there vias to pass signals from the top layer to the Mid2 layer and back. RF signals on
I don't see any meaningful debugging here. Do you have an oscilloscope? I might suspect that the load dependence of this "noise" may have to do with the source you are powering the converter with, and maybe you are dropping it into UVLO due to inadequate input filter capacitance / quality, or a current delivery limitation of the upstream supply.
Hi, I have been going through an application which requires 62A high side output with around 80A peak current support for 10s for an automotive application. Im checking one part BTS50055-1TMA from infineon. There seems two specification IL(ISO)=70A and IL(NOM)=17A. Im not sure which one to follow. Will this device suit my purpose. Im clueles
Hello. Just to explain what i meant by an internal power net: I am doing power gating, which means that my power domain can be switched off using power switches, and the power net used inside the power domain is different than the main VDD used for the top. It is an internal power net that is the output of the power switches --> VDD_SW1. Also,
Hi all, I am an Engineering Technician, I have been soldering and de-soldering in years. I have designed and home-made toner transfer PCB as well. Now I am thinking to take course for professional PCB design for my career. I am wondering which courses I should take. Did anyone take this course, is it good for beginners? Or any recommendation?
Hi, I am new in this field. I have rtl code of an IP. Now I want to implement wrappers around the i/o ports. Can you please suggest me how to do that? Do i need to write rtl code for the wrappers as well or any other means are available? Thanks in advance.