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參數資料
| 型號： | 935260937112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| 封裝： | PLASTIC, SOT-341, SSOP-28 |
| 文件頁數： | 9/37頁 |
| 文件大小： | 296K |
| 代理商： | 935260937112 |
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1999 Jan 13
17
Philips Semiconductors
Product specication
5 V mixer/oscillator-PLL synthesizers for
hyperband tuners
TDA6404; TDA6405;
TDA6405A
Fig.8 Input circuit for optimum noise figure in the VHF band.
(a) For fRF = 50 MHz:
VHF mixer frequency response measured = 57 MHz;
loss = 0 dB.
Image suppression = 16 dB.
C1 = 9 pF; C2 = 15 pF.
L1 = 7 turns ( 5.5 mm; wire = 0.5 mm).
I1 = semi rigid cable (RIM): 5 cm long.
(semi rigid cable (RIM); 33 dB/100 m; 50
; 96 pF/m).
(b) For fRF = 150 MHz:
VHF mixer frequency response measured = 150.3 MHz;
loss = 1.3 dB.
Image suppression = 13 dB.
C3 = 5 pF; C4 = 25 pF.
I2 = semi rigid cable (RIM): 30 cm long.
I3 = semi rigid cable (RIM): 5 cm long
(semi rigid cable (RIM); 33 dB/100 m; 50
; 96 pF/m).
handbook, full pagewidth
MBE286 - 1
L1
C2
C1
PCB
plug
BNC
RIM-RIM
I1
C4
C3
PCB
RIM-RIM
I3
I2
(a)
(b)
F=Fmeas loss (of input circuit) (dB).
Fig.9 Noise figure (F) measurement in the VHF band.
handbook, full pagewidth
MGL277
VHFIN IFOUT1
IFOUT2
D.U.T.
NOISE
SOURCE
NOISE
FIGURE
METER
BNC
RIM
INPUT
CIRCUIT
C
T
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