U4254BM-M Datasheet, PDF (11/14 Pages) ATMEL Corporation – Low-noise AM/FM Antenna Impedance Matching IC

U4254BM-M
Figure 14. Test Circuit for AM Large Signal Behavior
LPF
f_cutoff = 500 kHz
50 Ω
f = 500 kHz
V₀
1 nF
50 Ω
AMOUT1 ^{100 nF}
DUT
AMIN
AMOUT
100 nF
Analyzer
5 kΩ
R_in = 50 Ω
115 dBµV 75 dBµV
Figure 15. AM Harmonic Distortion
V_AMOUT
(dBµV)
115 dBµV
110
90
70
55 dBµV
50
45 dBµV
0.5
1.0
1.5
f (MHz)
11
4772B–AUDR–11/03