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hello madhukar,
sorry to confuse you, it is the negative rail or common, I misused the term ground to refer to the common or negative connection.
because i have seen some designs in the internet that places the output choke in buck and buck-derived topology on the negative rail. I asked...
hi to all!
can anyone tell me why there are some designs that place the output choke on the ground side and not on the positive rail?
one more thing is the output rectifier is also placed at the ground side and not on the positive side?
i've heard that it improves the EMI performance of...
choke for rectifier
hi to all!
can anyone tell me why there are some designs that place the output choke on the ground side and not on the positive rail?
one more thing is the output rectifier is also placed at the ground side and not on the positive side?
i've heard that it improves the EMI...
i2c spike
have a question also...
some applications uses schottky diodes connected to supply voltage and ground. Is this enough to suppress spikes or an additional RC filter needed? And since diodes have intrinsic capacitance when reversed bias, can we just use them?
Please help generate a multi-phase clock in the order of KHz from a reference clock input?
:?: :?:
Simple RC delay will not work at some duty cycle :( while using the propagation delay of logic gates will not be practical since I need milliseconds delay while propagation delay is in the...
Hi hill
Since the fans/motors turn on at the leading edge of the PWM signal, high peak current is drawn from the supply at the leading edge every cycle. Thus, simply delaying the PWM will just delay the first leading edge but not the succeeding leading edges, thus the peak current will not be...
Hi!
A PWM signal is needed to control the speed of fans and I want to add a delay / phase shift to to have 2 signals, one is just a delayed version of the other, so that high surge current is avoided during start-up. Please give me an idea how to implement this using discrete components (op amp...
permittivity fr4
hi mr_ghz,
i also used FR-4 like board from GILAM, and its good esp at freq above 3GHz. i think this is also more cost effective than Duroid.
you can check it out at:
http://www.gilam.com
fr4 permittivity
hi Olxx,
i think you can make the measurement yourself if if not inconvenient to measure. at least it will give you a more accurate value.
regards,
rfdipper
25a relay
hi to all!
can you please help me find a relay with a rating of 25A and is not higher than 12.5mm (0.49 inch). I need to use this but I'm restricted by the height.
appreciate your response.
rfdipper
hi again! :)
I read an article describing how to shorten a transmission line, which is very good if you are saving board space, but the the limiting factor is the high impedance of the shortened line and the capacitors used for resonance. :(
Is there other ways?
Thanks again. :)
so whats the best approach to protect the copper traces but not degrading the circuit perfomance much? :?:
are simulation software accurate enough to predict the effect of plating the copper lines?
solder mask effect on microstrip impedance
how can i take into consideration the effect of the plating to microstrip circuits? :?:
is soldermask advisable?
thanks
0 db coupler
i need to implement a 4x4 butler matrix using microstrip and to avoid line crossover (overlap), i would like to use a 0 dB coupler, but can't find any article describing how to design it. can you please help me?
thanks in advance :)
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