CMOS Optical Preamplifier Design Using Graphical Circuit Analysis

Gain×Bandwidth (Ω×rads/sec)
2.5
2
1.5
1
0.5
15 0
x 10 12
10
20
10
5
0
−10
0 −20
View A R (kΩ)
f 20*log (K ) View B
10 cm
f
5.2 Developing an Analytic Circuit Model 130
Figure 5.20 Plot of transimpedance gain-bandwidth product vs. feedback resistance
and current mirror gain.
Gain×Bandwidth (Ω×rads/sec)
x 1012
2.5
2
1.5
1
0.5
0
15
10
R f (kΩ)
5
0
Gain×Bandwidth (Ω×rads/sec)
x 1012
2.5
2
1.5
1
0.5
0
−20 −10 0
20*log (K )
10 cm
10 20
View A
View B
Figure 5.21 Two projections of the GBW plot in Figure 5.20.