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參數(shù)資料
| 型號(hào)： | CMY200 |
| 英文描述： | Downconverter |
| 中文描述： | 下變頻器 |
| 文件頁(yè)數(shù)： | 9/10頁(yè) |
| 文件大?。?/td> | 157K |
| 代理商： | CMY200 |
GaAs Components
CMY 200
Data Sheet
9
2001-01-01
Supplementary Remarks to CMY 200
This ultralinear down-converter device is developed especially for an excellent
intermodulation performance at low DC power consumption and a low demand of LO
power as used e.g. for the second mixer of double conversion TV tuners.
So this down-converter is optimized for a RF-frequency of 1200 MHz (1000 MHz to
1400 MHz) and an IF-frequency range of about 40 MHz to 100 MHz.
This mixer MMIC device contains a mixer, a gain controlled LO buffer stage and an IF
amplifier stage mounted into the very small MW-6 plastic package.
All ports are unsymmetric, RFport and IFport are near 50
.
The RFport is matched to 50
simply by a series inductance (the parasitic capacitance
at the RF-port to ground must be kept as small as possible).
The LO-port is a high impedance port with a inner DC connection (internal AGC for LO
buffer), a external DC block is necessary.
The LO port has a slightly negative input impedance within a frequency range of
500 MHz to 1100 MHz, no high source impedance should appear within this frequency
range, if DC is blocked or LO is matched (
R
< 300
).
Any noise spurious onto the LO source with the frequencies
f
=
f
LO
±
f
IF
should be
avoided.
1900
0.36
–
111
0.50
–
13
0.50
–
88
2000
0.36
–
113
0.50
–
14
0.48
–
90
Typical Reflexion Coefficients of CMY 200,
Z
0
= 50
(cont
’
d)
f
Input Impedance into
RF-Port (Pin #6) @
P
LO
=
–
2 dBm;
f
LO
= 1185 MHz
Reflexion Coefficient
Impedance into
IF-Port (Pin #4) @
P
LO
=
–
2 dBm;
f
LO
= 1185 MHz
Input Impedance into
LO-Port (Pin #1)
Reflexion Coefficient
Reflexion Coefficient
MHz
Mag
Ang
Mag
Ang
Mag
Ang
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