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參數(shù)資料
| 型號： | TDA6509A |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 3-band mixer/oscillator and PLL for terrestrial tuners |
| 中文描述： | 3波段混頻器/振蕩器，鎖相環(huán)路的地面電視調(diào)諧器 |
| 文件頁數(shù)： | 23/42頁 |
| 文件大?。?/td> | 274K |
| 代理商： | TDA6509A |
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2005 Mar 25
23
Philips Semiconductors
Product specification
3-band mixer/oscillator and PLL for
terrestrial tuners
TDA6508; TDA6508A;
TDA6509; TDA6509A
handbook, full pagewidth
FCE578
L1
C2
C1
PCB
plug
plug
BNC
BNC
RIM-RIM
I1
C4
C3
PCB
RIM-RIM
I3
I2
(a)
(b)
Fig.12 Input circuit for optimum noise figure in LOW and MID-bands.
(a) f
RF
= 50 MHz:
LOW band 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).
l1 = semi-rigid (RIM) cable, length = 5 cm (33 dB/100 m,
50
and 96 pF/m).
(b) For f
RF
= 150 MHz:
MID band mixer frequency response measured = 150.3 MHz,
loss = 0 dB.
image suppression = 13 dB.
C3 = 5 pF.
C4 = 25 pF.
l2 = semi-rigid (RIM) cable, length = 30 cm.
l3 = semi-rigid (RIM) cable, length = 5 cm (33 dB/100 m,
50
and 96 pF/m).
mdb263
D.U.T.
INPUT
CIRCUIT
LOW_RFIN or
MID_RFIN
GND
IFAMP_OUT1
IFAMP_OUT2
BNC
RIM
NOISE
METER
NOISE
SOURCE
2 x 5
turns
2
turns
N1/N2 = 5
Fig.13 Noise figure measurement in the LOW and MID-bands of the TDA6508; TDA6509.
NF = NF
meas
input circuit loss (dB).
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