ps6_2011_bilateral_design

ps6_2011_bilateral_design - ECE 145a/218A problem set...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 ECE 145a /218A problem set: Reactively matched ampliers: mostly bilateral design. Background: Unilateral Device model. We will assume a highly simplified device model as to the right, with g m W m mS g / 2 m i g R / 0 . 1 0 gd C fF g gs W m fF C / 5 . 0 g ds W m mS G / 1 . 0 Background:Bilateral Device model. g m W m mS g / 2 m i g R / 0 . 1 g gd W m fF C / 1 . 0 g gs W m fF C / 5 . 0 g ds W m mS G / 1 . 0 Problem 1a: Taking g W =100 microns for the bilateral device model, Plot the MAG/MSG stability factor K and B1 for the device of problem 1 vs frequency. At what frequencies is the device unconfitionally stable ? At a design frequency of 50 GHz, what is the maximum stable gain ? Calculate this by hand (!) and then compare to the ADS simulation. Problem 1b: Plot the device source and load stability circles at 50 GHz. What value of series resistance on the input would stablilize the device ? What parallel input resistance ? Repeat for the output. Problem 1c: Add series stabilization on the input so that the stablized MAG is 2 dB less than the transistor MSG at 50 GHz. Plot the input and output Ga and Gp circles at 50
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 3

ps6_2011_bilateral_design - ECE 145a/218A problem set...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online