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參數(shù)資料
| 型號(hào)： | 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)： | 19/42頁 |
| 文件大小： | 274K |
| 代理商： | TDA6509A |
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2005 Mar 25
19
Philips Semiconductors
Product specification
3-band mixer/oscillator and PLL for
terrestrial tuners
TDA6508; TDA6508A;
TDA6509; TDA6509A
8.
This is the level of signals close to the IF frequency which can interfere with the dividers. Typical interference signals
are channel S3: f
osc
= 256.15 MHz,
5
32
f
osc
= 40.02 MHz. The LOW and MID RF inputs must not be connected to
any load or cable; the HIGH RF inputs are connected to a hybrid (balun).
Crystal oscillator interference is the 4 MHz sidebands produced by the crystal oscillator. The rejection must be
greater than 60 dB for an IF output signal of 110 dB
μ
V for versions TDA6508; TDA6509 or 100 dB
μ
V for versions
TDA6508A; TDA6509A.
10. Reference frequency rejection measures the level of reference frequency sidebands with respect to the sound
sub-carrier f
ssc
.
11. Channel SO2 beat is the interfering product of the picture carrier frequency f
pc,
f
IF
and f
OSC
in channel SO2:
f
BEAT
= f
osc
2
×
f
IF
= 37.35 MHz. Another possible mechanism is: 2
×
f
pc
f
osc
. For the measurement,
V
RF
= 80 dB
μ
V.
9.
handbook, full pagewidth
MDB220
2
1
0.5
2
1
0.5
∞
0
+
j
j
43.25 MHz
161.25 MHz
2
0.5
1
Fig.5 Input admittance (S
11
) of the LOW band mixer (43.25 to 161.25 MHz); Y
O
= 20 mS.
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