weak inversion in analog and digital circuits - Lund Institute of ...
weak inversion in analog and digital circuits - Lund Institute of ...
weak inversion in analog and digital circuits - Lund Institute of ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Weak <strong><strong>in</strong>version</strong><br />
EXTRACTION OF U T AND CURRENT REFERENCE<br />
V+<br />
T6<br />
source<br />
s<strong>in</strong>k<br />
V-<br />
T 5<br />
I 1<br />
T3<br />
T 1<br />
T4≡T3<br />
I2 T2≡KT1<br />
R V R<br />
• For T 1 <strong>and</strong> T 2 <strong>in</strong> <strong>weak</strong> <strong><strong>in</strong>version</strong>:<br />
CSEM, E. Vittoz, 2003<br />
I 2<br />
slope K<br />
Q (unstable)<br />
V R = RI 2 =U T lnK<br />
• Self-start<strong>in</strong>g if leakage <strong>of</strong> T 2 larger than that <strong>of</strong> T 1 .<br />
mirror T 1 -T 2<br />
mirror T 3 -T 4<br />
[1]<br />
P(stable)<br />
I 1<br />
page 14