U4082B Datasheet, PDF (19/30 Pages) ATMEL Corporation – Low-voltage Voice-switched IC for Hands-free Operation

Figure 7-5. Receive Attenuator versus Volume Control
10
0
-10
Receive mode
-20
-30
-40
0.1
← Minimum recommended level
0.3
0.5
0.7
0.9
1.2
VCI/V_B
Figure 7-6. Receive Attenuation Gain versus V_S
10
0
-10
-20
-30
-40
2.8
3
3.2
3.4
3.6
V_S (V)
Figure 7-7. Microphone and 1^st-hybrid Amplifier Open-loop Gain and Phase versus Frequency
120
120
100
100
80
Microphone amp.
80
phase
Hybrid amp. phase
60
Gain
60
40
40
20
20
0
0
0.1
1
10
100
1000
f (kHz)
4743D–CORD–03/06
U4082B
19