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參數資料
| 型號： | 935261234512 |
| 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： | 15/44頁 |
| 文件大小： | 241K |
| 代理商： | 935261234512 |
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2000 Jan 24
22
Philips Semiconductors
Product specication
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
TDA6402; TDA6402A;
TDA6403; TDA6403A
TEST AND APPLICATION INFORMATION
Fig.12 Gain measurement in VHF band.
Zi >> 50 Vi =2 × Vmeas =80dBV.
Vi =Vmeas +6dB =80dBV.
Vo =V’meas ×
Gv = 20 log
50
22
+
50
-------------------
V
o
V
i
------
handbook, full pagewidth
MGE698
50
22
50
50
V
VHFIN
IFOUT
e
Vmeas
RMS
voltmeter
spectrum
analyzer
Vo
Vi
D.U.T.
V'meas
signal
source
Fig.13 Input circuit for optimum noise figure in VHF band.
(b) For fRF = 150 MHz:
mixer A frequency response measured = 150.3 MHz, loss = 1.3 dB
image suppression = 13 dB
C3 = 5 pF
C4 =25pF
l2 = semi rigid cable (RIM): 30 cm long
l3 = semi rigid cable (RIM): 5 cm long
(semi rigid cable (RIM); 33 dB/100 m; 50
; 96 pF/m).
(a) For fRF = 50 MHz:
mixer A 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)
l1 = 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)
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