Design and Analysis of a Novel Noise Cancelling Topology for Common Gate UWB LNAs - VLSI Design and Test - page 171

% NF Contribution in UWB LNA

M1
42%

M2
22%

M5
L1
other
5%

Lo
11%

M4
9%

M3
5% L2

6%

n by UWB LNA components for entire range of 3.1-10.6 GHz Fig. 2. Noise contribution

16

Frequency (GHz) Frequency (GHz)

14

12

10

8

6

4

2

0

f f 1 .52 .53 . .5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12

82 2.72 2.68 2.67 2.69 2.73 2.77 2.82 2.88 2.90 2.98 3.06 3.14 3.20 3.28 3.37 3.47 3.57
10 2.87 1.82 1.03 0.55 0.33 0.35 0.54 0.88 1.31 1.80 2.35 2.86 3.27 3.78 4.31 4.83 5.36
18 1.40 1.26 1.16 1.09 1.03 0.99 0.96 0.93 0.92 0.90 0.89 0.89 0.88 0.88 0.88 0.82 0.83
19 0.15 0.12 0.10 0.09 0.09 0.11 0.16 0.23 0.33 0.48 0.67 0.88 1.08 1.36 1.71 2.10 2.55

M1

5.47 5.18 4.16 3.39 3.01 2.8

M2

0.00 14.1 10.4 7.74 5.76 4.1

Ls Lo

0.00 4.97 3.30 2.49 1.89 0.1

M3

0.00 0.00 0.42 0.30 0.23 0.1

Fig. 3. Noise figure cont tribution of UWB LNA major components at all frequencies

Fig. 4. Prop osed noise cancellation concept for UWB LNA