HA12181FP
Example of Noise Reduction Effect
20
10
0
Two Signals dummy ANT.
V
CC
=8.2V
AM SG : fc=999kHz, m=30%, fm=1kHz
Pulse : No input
Vout
–10
50Ω
Output (dB)
NRoff
16Ω 16Ω
15p
To
ANT
Pulse SG Output (EMF)
10µs
100mV
P-P
Pulse SG.
50Ω
16Ω
30Ω
65p
–20
–30
–40
Pulse : No input
AM SG.
2µs
NRon
Noise
Figure.2
AM SG : fc=999kHz,
no mod.
Pulse SG :
Refer to Figure.2
–50
–60
0
10
20
30
40
50
60
70
80
AM SG Output (EMF) (dBµ)
90
100
110
120
20
10
0
Two Signals dummy ANT.
V
CC
=8.2V
AM SG : fc=999kHz, m=30%, fm=1kHz
Pulse : No input
Vout
–10
50Ω
Pulse SG.
50Ω
AM SG.
16Ω 16Ω
15p
To
ANT
Pulse SG Output (EMF)
10µs
Output (dB)
–20
NRon
NRoff
16Ω
30Ω
65p
100mV
P-P
10µs
–30
–40
–50
–60
0
Figure.3
Noise
AM SG : fc=999kHz,
no mod.
Pulse SG :
Refer to Figure.2
10
20
30
40
50
60
70
80
AM SG Output (EMF) (dBµ)
90
100
110
120
Rev.2.00 Jun 15, 2005 page 11 of 19
RENESAS [ RENESAS TECHNOLOGY CORP ]
