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參數資料
| 型號： | L9216A |
| 英文描述： | CAP CER 270PF 3.15KVDC R3 RAD |
| 中文描述： | 短環振鈴用戶接口與地面開始 |
| 文件頁數： | 27/48頁 |
| 文件大小： | 1062K |
| 代理商： | L9216A |
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Preliminary Data Sheet
September 2001
Short-Loop Ringing SLIC with Ground Start
L9216A/G
Agere Systems Inc.
27
Supervision
(continued)
Power Ring
(continued)
Sine Wave Input Signal and Sine Wave Power Ring Signal Output
(continued)
It is recommended that the input level at RING
IN
be adjusted so that the power ring signal at tip and ring is just at
the edge or slightly clipping. This gives maximum power transfer with minimal distortion of the sine wave. The tip
side will saturate at a nominal 1 V above ground. The ring side will saturate at a nominal 3 V above battery. The
input circuit for a sine wave along with waveforms to illustrate the tip and ring saturation is shown in Figure 12.
12-3532J
Figure 12. RING
IN
Operation
The point at which clipping of the power ring signal begins at tip and ring is a function of the battery voltage, the
input capacitor at RING
IN
, and the input signal at RING
IN
and Vcc. Typical characteristic conditions showing the
onset of clipping are given below.
Table 21. Onset of Power Ringing Clipping V
CC
= 5 V, Cinput = 0.47
μ
F
Table 22. Onset of Power Ringing Clipping V
CC
= 3.1 V, Cinput = 0.47
μ
F
Input
T/R
V
BAT1
(V)
–70.15
–68.06
–66.00
–64.08
–62.04
–60.05
Vrms (mV)
891
858
833
814
789
747
Vrms (V)
46.88
45.11
43.69
42.57
41.21
39.11
Gain
52.62
52.58
52.45
52.30
52.23
52.36
Input
T/R
V
BAT1
(V)
–70.12
–68.07
–66.06
–64.01
–62.00
–60.00
Vrms (mV)
894
855
824
799
780
749
Vrms (V)
47.15
45.11
43.38
41.95
40.79
39.09
Gain
52.74
52.76
52.65
52.5
52.29
52.19
GND
V
BAT
PT
+1
TR
27.5x
RING
IN
0.47
μ
F
INPUT
L9216
V
TIP
V
RING
–1
3 V
100 k
1 V
V
BAT
= –75 V
71 V
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