Transcription of Lecture 9: Intercept Point, Gain Compression and Blocking
{{id}} {{{paragraph}}}
Example: tourism industry
Lecture 9: Intercept Point, Gain Compression and Blocking
EECS 142 Lecture 9: Intercept Point, Gain Compression andBlockingProf. Ali M. NiknejadUniversity of California, BerkeleyCopyrightc 2005 by Ali M. NiknejadA. M. NiknejadUniversity of California, BerkeleyEECS 142 Lecture 9 p. 1/29 p. 1/29 Gain CompressionViVodVodViViVodVodViThe large signal input/output relation can display gaincompression or expansion. Physically, most amplifierexperience gain Compression for large small-signal gain is related to the slope at a givenpoint. For the graph on the left, the gain decreases forincreasing M. NiknejadUniversity of California, BerkeleyEECS 142 Lecture 9 p. 2/29 p. 2/291 dBCompression Point VoVi ViPo, 1dBPi, 1dBGain Compression occurs because eventually theoutput signal (voltage, current, power ) limits, due to thesupply voltage or bias we plot the gain (log scale) as a function of the inputpower, we identify the point where the gain has droppedby1 dB.
The input power level is known as IIP2, and the output power when this occurs is the OIP2 point. Once the IP2 point is known, the IM2 at any other power level can be calculated. Note that for a dB back-off from theIP2 point, the IM2 improves dB for dB A. M. Niknejad University of California, Berkeley EECS 142 Lecture 9 p. 8/29 – p. 8/29
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: