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| 型號(hào)： | P3324 |
| 英文描述： | 44 PIN, 48 KB ENH FLASH, 3804 RAM, 36 I/O, -40C to +85C, 44-QFN , T/R |
| 中文描述： | 變壓器V.22BIS |
| 文件頁(yè)數(shù)： | 3/5頁(yè) |
| 文件大?。?/td> | 119K |
| 代理商： | P3324 |
P3324
ETALDOC 597/4
Page 3 of 5
September 2000
MATCHING RECOMMENDATIONS
The following recommendations start with the simplest implementations and progress to enhanced
performance utilizing additional components. Good performance is achieved even with the simplest
configurations. The implementations assume a low impedance balanced TX drive and a relatively high
impedance RX input, as is commonly available, though use with other TX/RX arrangements is
straightforward. Note that there are no changes to components on the line side, or in the hybrid, whether
600
or complex reference impedance selected, thus assisting country configuration. For complex
impedance, the matching circuits derived are suitable for reference impedances of the type 270 +
750//150nF e.g. European CTR21 and 220 + 820//120nF (or 115nF) e.g. Australia, South Africa, etc., and
yield similar performance characteristics. For other impedances, please contact ETAL.
Minimum Cost Implementations
Insertion Loss: 2.2dB @ 2kHz
Frequency Response : ±0.1dB 200Hz – 10kHz
Return Loss: 18dB 200Hz – 4kHz
Transhybrid Loss: 22dB 200Hz – 4kHz
Improved matching and hybrid
Insertion Loss (Line to RXA): 3.2dB @ 2kHz
Frequency Response : ±0.1dB 200Hz – 10kHz
Return Loss: 20dB 200Hz – 4kHz
Transhybrid Loss: 30dB 200Hz – 10kHz
Insertion Loss: 1.3dB @ 2kHz
Frequency Response : ±0.5dB 200Hz – 4kHz
Return Loss: 18dB 200Hz – 4kHz
Transhybrid Loss: 14dB 200Hz – 4kHz
Insertion Loss (Line to RXA): 2.5dB @ 2kHz
Frequency Response : ±0.5dB 200Hz – 4kHz
Return Loss: 20dB 200Hz – 4kHz
Transhybrid Loss: 18dB 200Hz – 4kHz
600
Fig. 2
LINE
600
560
RXA
TXA2
TXA1
4.7 F
600
Fig. 4
LINE
600
10nF
560
1k
1nF
10k
RXA
TXA2
TXA1
4.7 F
LINE
270
(220)
750
(820)
150nF
(120nF)
4.7 F+
820
100nF*
*Note: 100nF capacitor should have a temperature stable dielectric
+ Note: 2.2 F capacitor may be acceptable
100
Complex European CTR21/(Australia, etc.)
Fig. 3
RXA
TXA2
TXA1
10nF
1nF
LINE
270
(220)
750
(820)
150nF
(120nF)
750
100nF*
*Note: 100nF capacitor should have a temperature stable dielectric
+ Note: 2.2 F capacitor may be acceptable
120
Complex European CTR21/(Australia, etc.)
Fig. 5
RXA
TXA2
TXA1
1k
10k
4.7 F+
Patented
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