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Recent content by vaibhavwaman

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    Diode forward voltage drop at lower forward current

    Is making linear approximation for calculating forward voltage drop at lower current than 10uA is good option ? I want to pass current approximately 100nA via this diode and want to understand forward voltage drop in this case ? Or is their any specific reason for which datasheet dont give...
  2. V

    Overvoltage protection circuit

    Sorry It was not mentioned in schematic. As per BOM Q2 is PDTA124EU,115 and Q3 is PDTC114EU,115. my intention is to use low cost descrete based overvoltage protection ciruit. Do you recommend to use this ciruit for overvoltage protection ?
  3. V

    Overvoltage protection circuit

    Hello, In mentioned circuit there is overvoltage protection is implemented at input using P channel MOSFET and transistor. When there is voltage higher than D2 it starts conducting and then respectively Q2 also starts conducting making Q1 turn off. What will be the voltage across Vgs in case of...
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    Series termination selection for oscillator output pim

    I am using IC oscillator for microcontroller clock input. there due to harmonics of oscilltor we have observed failure in radiated emission level test. after adding 47Ohm of series termination resistor we have passed the radiated emission test. I want to prove this theoratically using...
  5. V

    Minimum on time calculation in DCM mode

    Hello, I am working on Buck converter design using LMR14006 converter. In this at light load it enters into DCM (discontinues conduction mode). So for this I wanted to understand how to calculate minimum on time of swich in this DCM mode ? Thank you. Best Regards, Vaibhav
  6. V

    N Channel MOSFET Turn On Behaviour

    Hello, When I simulated below N channel MOSFET circuit, I observed though MOSFET is connect to ground it starts conducting from Drain to source after ~30V ? why this is happening ? This MOSFET has 200V VDS breakdown voltage but still it conducts far earlier. Rise time of Drain voltage is also...
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    Supercap charging using load switch and current limit resistor

    We are using load switch and current limiting resistor to charge supercap from 5V, As we have 3.3V available at source we convert it to 5V using boost converter to charge supercap till 5V to get more backup time. We are using FPF2125 switch to protect reverse current flowing from supercap to...

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