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參數(shù)資料
| 型號： | 2689J2 |
| 廠商： | BEL FUSE INC |
| 元件分類： | 電信用變壓器 |
| 英文描述： | HIGH FREQUENCY MAGNETICS Wideband Hybrid Signal Combiner & Splitter |
| 中文描述： | TELECOM TRANSFORMER |
| 文件頁數(shù)： | 2/2頁 |
| 文件大?。?/td> | 49K |
| 代理商： | 2689J2 |
CORPORATE
Bel Fuse Inc.
198 Van Vorst Street
Jersey City, NJ 07302
Tel
201-432-0463
Fax
201-432-9542
www.belfuse.com
FAR EAST
Bel Fuse Ltd.
8F / 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel
852-2328-5515
Fax 852-2352-3706
www.belfuse.com
EUROPE
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite F23, Preston
Lancashire, PR1 8UD, U.K.
Tel
44-1772-556601
Fax 44-1772-888366
www.belfuse.com
HIGH FREQUENCY MAGNETICS
Wideband Hybrid Signal Combiner & Splitter
1999 Bel Fuse Inc. Specifications subject to change without notice. 06.99
TM9923
T149
Pin
1
Symbol
ASIG
Name and Function
A signal. Input for splitter configuration.
Output for combiner application.
Common point of transformer 1.
Must be connected externally to COM2.
B signal. Output for splitter configuration.
Input for combiner application.
C signal. Output for splitter configuration.
Input for combiner application.
Common point of transformer 2.
Must be connected externally to COM1.
Ground. Connect to circuit ground.
162
external resistor.
7 pF external capacitor.
2
COM1
3
BSIG
4
CSIG
5
COM2
6
GND
R1
C1
APPLICATIONS NOTES
The 2689J2 hybrid transformer operates with 75
terminations over an extremely wide frequency
spectrum (3 dB response: 20 kHz to 800 MHz).
It can also be used as a pulse transformer with
very fast pulses (typical rise time: 0.5 ns). The
2689J2 operates as either a signal splitter or a
signal combiner. As a signal splitter, the trans-
former provides two identical output signals
(which are in phase with each other) from a
single input. Each of the two output signals is
3 dB down from the input signal (half the power
of the input signal). There is a high degree of
separation or transhybrid loss between the two
output signals. As a signal combiner, the trans-
former provides a single output signal from two
identical input signals (which are in phase with
each other). The output signal has twice the
power of either input signal.
PIN DESCRIPTIONS AND TERMINATIONS
PIN DIAGRAM
SIGNAL SPLITTER
SIGNAL COMBINER
1
2
3
ASIG
COM1
BSIG
6
5
4
GND
COM2
CSIG
2689J2
ASIG
COM1
GND
BSIG
CSIG
R
1
INPUT
INPUT
75
LINE
75
LINE
COM2
C
1
75
LINE
OUTPUT
2689J2
ASIG
COM1
GND
BSIG
CSIG
R
1
OUTPUT
OUTPUT
75
LINE
75
LINE
COM2
C
1
INPUT
2689J2
75
LINE
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