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Recent content by netloginkk

  1. N

    Power MOSFET testing

    But i have a continuous power supply of 20A. How do i switch it on and off for getting low pulse widths. Do i need to use a MOSFET (apply pulse to gate and supply between drain and source) to get pulsed o/p and apply to drain of mosfet (DUT).
  2. N

    Power MOSFET testing

    Mr.David Levy, Tested RDS(ON) for continuous current upto 5A (max. continuous current is 52A and pulsed current is 260A), but the device is getting hot. Thank you for the help, I just started to understand POWER MOSFET. Just curious about pulse test.
  3. N

    Power MOSFET testing

    Thanks for the reply... and sorry for taking long time (i was busy with other work). I will try the continuous current test. But i am more interested in pulse test as most of the times i have to do pulse test. Do you mean pulse of 10V is applied to gate or constant 10V at gate and pulsed...
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    Power MOSFET testing

    Thank you for the reply. But if you connect the power supply directly to drain, then Vds is equal to your supply voltage. So you will burn the FET.
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    Power MOSFET testing

    Hi, I am testing IRF4905. (Datasheet: http://www.irf.com/product-info/datasheets/data/irf4905.pdf ) For measuring RDS(ON), at VGS=-10 and ID=-38A, i have used the following circuit The drain resistor is a rheostat. After applying pulsed gate voltage, i am varying VDD (10V to 30V) and the...
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    FPGA@40MHz, data@250kHz

    I have to send 16 bit serial data to fpga using PCs serial port or parallel port. depending on my 16 bit data fpga controls some other devices and reads 16 bit data from them. this 16 bit data has to be sent to PCs serial port or parallel port serially my fpga clock is 40mhz.
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    FPGA@40MHz, data@250kHz

    Hi, I am writing a code for Xilinx fpga in vhdl fpga works at 40Mhz clock but I communicate with fpga at 250kHz ( control the fpga and read the result using PC's serial or parallel port, if required with external clock). I have to send the data serially through pc and read the result serially...
  8. N

    High frequency microstrip pcb

    thank you guys i will back after i go through.....
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    High frequency microstrip pcb

    Thank you WimRFP and rupeshchannawar i am almost a fresher to microstrip or rf.... yes i want to measure the parameters of component (surface mount amplifiers, mosfets, switches say hmc313, inductors.....). i need to measure both the input and output reflections of the components and sometimes...
  10. N

    High frequency microstrip pcb

    i need to design microstrip pcb (50Ω char. impedance @ say 1-5GHz) for testing SMD type components. I use RT duroid 5880 5mil/10mil someone told me that i have to maintain track width / dielectric height = 2 for 50 ohm char. impedance if so the width will be constant, but i need to change the...
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