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Demystifying Switched Capacitor Circuits
book

Demystifying Switched Capacitor Circuits

by Mingliang (Michael) Liu
June 2006
Intermediate to advanced content levelIntermediate to advanced
336 pages
10h 24m
English
Newnes
Content preview from Demystifying Switched Capacitor Circuits
Basic MOS Device Physics
5
The transconductance can also be expressed as
g
C
W
L
I
I
V
m
nox d
d
eff
==2
2
µ
(1.6)
Interestingly, Equation (1.6) indicates that g
m
can be determined by the ratio of
the drain current (I
d
) to the effective gate-source voltage (V
eff
). What’s more, it is
possible to make the transconductance be independent of the value of (W/L) as long
as that ratio is kept as a constant. Hence, to a fi rst-order approximation, the scaling
of the transistor geometry does not affect g
m
. This is a desirable feature because the
voltage gain and accuracy can be maintained while the device is being downscaled
(however, this argument does not hold in ...
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Publisher Resources

ISBN: 9780750679077