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Recent content by padoh

  1. P

    comparison between ABCD and T param

    what is the difference between ABCD param and T param? which of these should be used for deembedding when the centre frequency is 1.8GHz?
  2. P

    Matlab Codes_s parameter to transmission line parameters

    Consider two structures in cascade I wil name the combined structure as C. I have the s-parameters for the structure A and for the overall structure C. I want to extract the s-param for the structure B. i need to use matlab for the purpose. The technique i have chosen is to convert S-param...
  3. P

    convergence error in cadence using n-port

    I am simulating a differential class E amplifier in candence spectre. I have included n-ports at the input lines to include the effect of PCB traces (s2p file). I have run the PSS analysis. I am getting the following errors Error requirements were not satisfied because of convergence...
  4. P

    Concatenating n 2D matrices into a single 3D matrix

    i want to concatenate around a 100 2D matrices into a 3D matrix. e.g cat[3,A,B] would combine the A and B matrices into a 3D matrix say if i want to combine 100 matrices into a 3D matirx id have to use this command cat[3,A1,A2,A3...] which is tedious any solutions?
  5. P

    Concatenating n by n matrices in matlab

    i want to concatenate around a 100 2D matrices into a 3D matrix. e.g cat[3,A,B] would combine the A and B matrices into a 3D matrix say if i want to combine 100 matrices into a 3D matirx id have to use this command cat[3,A1,A2,A3...] which is tedious any solutions?
  6. P

    conversion of s param file to t param file in matlab

    is there any command for converting an S-parameter text file into a Transmission (ABCD) parameter file in matlab?
  7. P

    PVT corner simulations

    is there any difference between PVT simulations and PVT corner simulations or do they just mean the samething? (w.r.t LNA design)
  8. P

    distributed power amplifier

    CMOS 130nm..i just applied a 500f cap n even then the gain is negative ..upto several micros of capacitance, the gain is still negative..its a three staged cascoded DA with inductive degenration..a transmission line at the input.. - - - Updated - - - ive attached a ppr..plz see fig2..my design...
  9. P

    distributed power amplifier

    its kind of confidential..can u just specify some of the reasons tht might be the causes.. frequency from 100M to 2G..plz it would be a great help..m just stuck up..
  10. P

    distributed power amplifier

    ive designed a distributed LNA..but as i place the input coupling cap of 50p or greater or infact any capacitor at the i/p, my gain becomes negative? can anyone plz suggest where is the problem in the design? the o/p coupling cap works fine
  11. P

    size of transistor for driving another transistor

    can a 1mm transistor be driven by a 20um transistor for length 130nm? is there any way of determining this?
  12. P

    [SOLVED] use of switch in analoglib cadence

    yeah id rotated the switch n used it instead of flipping it so the terminal connections were wrong..
  13. P

    [SOLVED] use of switch in analoglib cadence

    thanks a lot!! but i still cannot turn on the switch..all the parameters are ok, ive generated a pulse using the port component with 50% duty cycle, yet the output voltage at the switch is a constant zero level..ive checked switch polarities also..ive just used a simple circuit with port switch...
  14. P

    [SOLVED] use of switch in analoglib cadence

    i am using the switch component in analog lib in cadence..other than the parameters of open switch resistance and closeswitch resistance, there's another parameter of resistance in the switch properties..wats does thgis parameter 'resistance' specifies??
  15. P

    how to determine bondwire parameters

    i have a packaged ic and i need to find out the length of the bond wires used inside the package, how do i find those ? also there are vias inside the package will they have considerable inductances so that they affect the performanec of the ic? but more importantly how do i find the exact...

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