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| 型號(hào)： | MPC100 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Wide Bandwidth 4 x 1 Video Multiplexer(寬帶4 x 1視頻多路復(fù)用器) |
| 中文描述： | 寬帶4 × 1視頻多路復(fù)用器（寬帶4 × 1視頻多路復(fù)用器） |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大?。?/td> | 128K |
| 代理商： | MPC100 |
By Christian Henn
THE MPC100 ANALOG MULTIPLEXER IMPROVES
RF SIGNAL DISTRIBUTION
When designing high-performance systems for RF and video
applications requiring amplifiers, multiplexers, DC restora-
tion circuits, switched and continuous multipliers, or pro-
grammable gain amplifiers, finding the right component to
do the job is not easy. The new 4 to 1 video multiplexer
MPC100 opens the door to high-speed signal distribution
without the headaches. This component contains four
wideband open-loop amplifiers connected together inter-
nally at the output with a bandwidth of 180MHz at 1.4Vp-
p signal swing. When the user selects one channel by
applying a digital “1” to the corresponding SEL input (see
Figure 1), the component acts as a buffer amplifier with a
high input impedance of 0.88M
||1pF and a low output
impedance of 11
.
The MPC100 can be used to design a bus-controlled distri-
bution field, as shown in Figure 3. In this application, a
driver device, which is controlled by a memory and a
parallel-to-serial converter, shifts the information about the
field state into the output latches, U
1
, U
2
, and U
3
. When the
strobe line is triggered the new latch information is stored in
the output latches, which controls whether the buffers of the
MPC100 (U4-U9) are in an “on” or “off” state. The MPC100
operates with a fast make-before-break switching action to
keep the output switching transients small and short. As
shown in Figure 2, the switching time from one channel to
the next is less than 0.5
μ
s, and the signal envelope during
transition rises and falls symmetrically and shows practi-
cally no overshoot or DC settling effects. A transmission
FIGURE 1. MPC100 Wide Bandwidth 4
X
1 Video Multi-
plexer.
FIGURE 2. Switching Time from Channel to Channel of the
MPC100.
SWITCHING ENVELOPE
O
IN
1
1
DB1
IN
2
3
DB2
IN
3
5
DB3
IN
4
7
DB4
SEL
1
11
V
OUT
SEL
2
SEL
3
SEL
4
14
13
9
8
FIGURE 3. Serial Bus-controlled Distribution Field Using the MPC100.
MPC100
SEL Inputs
3
MPC100
SEL Inputs
3
Parallel Out
HC4094
15
SER
Out
1
5
7
1
5
7
4
5
6
7 14 13 12 11
3
1
Parallel Out
HC4094
15
SER
Out
3
1
SER IN
CLOCK
STR
OE
2
9
2
9
0
MPC100
SEL Inputs
3
MPC100
SEL Inputs
3
1
5
7
1
5
7
4
5
6
7 14 13 12 11
Time (
μ
s)
Mailing Address: PO Box 11400 Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd. Tucson, AZ 85706
Tel: (602) 746-1111 Twx: 910-952-111 Telex: 066-6491 FAX (602) 889-1510 Immediate Product Info: (800) 548-6132
1993 Burr-Brown Corporation
AB-049
Printed in U.S.A. March, 1993
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