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Recent content by ninju

  1. N

    Gain of cmos inverter

    Refer Rabaey, your question is answered in that book. (reducing Vdd increases gain upto a certain voltage)
  2. N

    Basic Doubt about determining filter order..

    1. Either derive the entire thing. 2. Or put the whole circuit in a simulator and do a .AC and see the no of poles. 3. Or, understand the whole thing intuitively and figure out which components are likely to cause a pole and which cause a zero.
  3. N

    circuit of frequency sweeping

    Use a FPGA, build a NCO, control the frequency, use a DAC and a filter to make it a continuous wave. Building a pure analog circuit with 1-30MHz is pretty complicated using discrete components alone. You might want to look for some FM generator circuits or a circuit that can generate chirp...
  4. N

    On what frequency the shrinking technology runs ?

    Usually, what happens is, as the length is shrunk , the FET starts behaving more like a resistor than a transconductor. Because of this, the gate oxide in smaller length FETs is made thinner to increase Cox (gm increases with Cox). So, for the same area, the reduction in capacitance is actually...
  5. N

    how to do division in VHDL

    Repeated subtraction is one method i can think of. There are a lot of dedicated algorithms. Look up tables too is possible.
  6. N

    FPGA Implementation Verification

    Use the RAM to load your program. Some mapping has to be done. I haven't tried this in Xilinx, only Altera.
  7. N

    Most frequency-wide reciever?

    Please clarify your question. Whats your purpose? What kind of receiver are you looking for? IC or an architecture? or by 'receiver' , do you mean the antenna?
  8. N

    FPGA Design using MATLAB simulink

    I haven't used the Altera one as such. It was a filter generated using matlab's vhdl coder that caused a problem and was un-synthesisable. You'd better ask someone else about this. I have a much much older version of matlab. I doubt its supported anymore.
  9. N

    I need the exact definition of Accuracy.

    https://en.wikipedia.org/wiki/Accuracy_and_precision
  10. N

    When will laplace transform become fourier transformable?

    Laplace transform is a form of fourier transform. Take a signal ,multiply it by e^(sigma t) then take fourier transform, then its laplace transform. We use laplace transform as a more general case with the sigma factor as a variable, just to see for what values of sigma, it converges. In other...
  11. N

    FPGA Design using MATLAB simulink

    I need more details on what you did, also which version of MATLAB you're using. One more word of caution, last time, when i used the HDL coder, it gave an un-synthesizable VHDL code. I don't know how it'll be for verilog.
  12. N

    [SOLVED] RF amplifier with one or two transistors

    Try this: Voltage gain is -RL/R1 and if Rs=RL=R, output impedance = input impedance = Rf/(1-Av)
  13. N

    Is there anyother circuit can replace BUCK circuit?

    Whats more important for you? Area or Efficiency? If you don't want to build a discrete circuit, try an IC. https://www.ti.com/lsds/ti/analog/powermanagement/power_portal.page
  14. N

    Which of these books is best for Microelectronics and why

    I have read Sedra, it was good. I have read two other books by Razavi and they were both pretty good. Almost all books in this field cover almost the same stuff. Sedra is the standard textbook .
  15. N

    IP3 measurement setup

    Do as above. Give two input signals, from the same source, of the same amplitude and frequency. This simplifies things greatly.

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