Impedance transformation
Download
1 / 7

Impedance Transformation - PowerPoint PPT Presentation


  • 87 Views
  • Uploaded on

Impedance Transformation. Resistance of Inductor. R= R sh (L/W) R sh is the sheet resistance Rsh is 22 mOhms per square for W=6um. If the outer diameter is 135 um, the length is approximately 135um x4=540 um. R=22 mOhms x (540/6)=1.98 Ohms.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Impedance Transformation' - dai-townsend


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Resistance of inductor
Resistance of Inductor

  • R=Rsh(L/W)

    • Rsh is the sheet resistance

    • Rsh is 22 mOhms per square for W=6um.

    • If the outer diameter is 135 um, the length is approximately 135um x4=540 um.

    • R=22 mOhms x (540/6)=1.98 Ohms

Q=(ωL)/R=(2π2.4G0.336 nH)/1.98 Ω=2.56


Include resistor in the tank circuitry
Include Resistor In the Tank Circuitry

Q=2.427/(3.076-1.888)=2.04

Inclusion of parasitic resistance

reduces the circuit Q from 10.


Problem
Problem

  • The gain drops significantly when the resistive loss in the inductor is accounted for.


Assignment
Assignment

  • Redesign the circuit so that it meet the following specifications:

    • fo=2.4 GHz

    • Q(circuit quality factor)>7

    • Av=Vout/Vin=-6 dB

    • Rs=50 Ohms


Design constraints
Design Constraints

  • Design constratins:

    • Av=Rp/(Rs+Rp)

    • Rp=Rind(1+Qind*Qind)

    • Qcirc=ωo(Rp*Rs/(Rp+Rs))C=ωoAvRsC

    • ωo=1/sqrt(LC)

    • Qind=ωoL/Rind


Submission check list
Submission Check List

  • Determine the Qind that achieves the Av.

  • Submit the circuit schematic

  • Submit AV as a function of frequncy from 1M to 10 GHz.


ad