參數(shù)資料
型號: L9216A
英文描述: CAP CER 270PF 3.15KVDC R3 RAD
中文描述: 短環(huán)振鈴用戶接口與地面開始
文件頁數(shù): 29/48頁
文件大小: 1062K
代理商: L9216A
Preliminary Data Sheet
September 2001
Short-Loop Ringing SLIC with Ground Start
L9216A/G
Agere Systems Inc.
29
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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