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參數資料
| 型號： | L9215A |
| 英文描述： | CAP CER 2200PF 3.15KVDC R3 RAD |
| 中文描述： | 短回路正弦波振鈴用戶接口 |
| 文件頁數： | 31/50頁 |
| 文件大小： | 1115K |
| 代理商： | L9215A |
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Data Sheet
September 2001
Short-Loop Sine Wave Ringing SLIC
L9215A/G
Agere Systems Inc.
31
Supervision
(continued)
Power Ring
(continued)
PWM Input Signal and Sine Wave Power Ring Sig-
nal Output
(continued)
Modulation waveforms showing PWM are in Figure 14
below.
Figure 14. Modulation Waveforms
5 V V
CC
Operation
A PWM signal was generated with an HP
8116
Function Generator modulated with a 20 Hz signal. The
optimal frequency used was 10 kHz. THE PWM signal
amplitude was 5.0 V (0 V to 5 V). This signal is shown
in Figure 15.
12-3575F
Figure 15. 5 V PWM Signal Amplitude
This input produced 44.96 Vrms ringing signal on
tip/ring under open loop conditions and 42.0 Vrms was
delivered to 5 REN load. The ringing output on ring,
with V
CC
= 5 V, is shown in Figure 16.
1660
Notes:
The modulating 20 Hz signal THD was measured at 1.3 %.
The tip/ring 20 Hz signal THD was measured at 1 %.
V
BAT1
= –70.6 V, V
BAT2
= –26.5 V, V
CC
= 5.019 V.
PWM input 10 kHz, 5.0 Vp-p.
R
1
= 10 k
, C
1
= 0.22
μ
F, C
2
= 0.47
μ
F.
Figure 16. Ringing Output on RING, with V
CC
= 5 V
12-3381(F)
A. Upper = Pwm Signal Centered at 10 kHz
Lower = Modulation Signal
12-3380(F)
B. Same as A but Expanded
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