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 ...
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Weak <strong><strong>in</strong>version</strong><br />
• Cha<strong>in</strong> <strong>of</strong> <strong>in</strong>verters<br />
Vo2 Vo4 Vo6 Vo8 V L<br />
V H<br />
3<br />
von =v<strong>in</strong>+1 2<br />
STANDARD TRANSITIONS IN HOMOGENEOUS SYSTEM<br />
4<br />
1<br />
v o1<br />
v o2<br />
v o3<br />
v o4<br />
v o5<br />
v o6<br />
0<br />
0 1 2 3<br />
CSEM, E. Vittoz, 2003<br />
v o7<br />
2T d /T 0<br />
v o8<br />
2T d<br />
n = 1.6<br />
v B = 4<br />
normalized time t /T 0<br />
• Characteristic time : T 0 =CU T /I 0<br />
• Transitions become st<strong>and</strong>ard after a few stages<br />
• Normalized delay time T d /T 0 only depends on V B <strong>and</strong> n.<br />
v H<br />
v L<br />
page 22
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