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參數(shù)資料
| 型號(hào)： | X3211 |
| 廠商： | 友順科技股份有限公司 |
| 英文描述： | LINEAR INTEGRATED CIRCUIT |
| 中文描述： | 線性集成電路 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 198K |
| 代理商： | X3211 |
UTC X3211
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
8
QW-R122-004,C
the power input of the LNB via a high value (10k) resistor. With th input voltage of the LNB set at or below 14V.FET
Q2 will be enabled. With the input voltage at or above 15.5V,FET Q1 will be enabled.The disabled FET has its gate
driven to 0V and its drain terminal is switched open circuit.FET number Q3 is always active regardless of the voltage
applied to Vpol.
Drain
voltage&
Current
Controller
V
SUB
G3
20
μ
A
Q3
D3
Drain
voltage&
Current
Controller
V
SUB
G2
20
μ
A
Q2
D2
Drain
voltage&
Current
Controller
G1
20
μ
A
Q1
D1
+
-
14.75V
Reference
V
POL
Input
V
SUB
Enable
Enable
Enable
Control input switch function
INPUT SENSE
<= <= ≤
14 volts
≥
15.5 volts
POLARISATION
Vertical
Horizontal
SELECT
FET Q2
FET Q1
For many LNB application tone detection and band switching is required.The X3211 includes the circuitry necessary
to detect the presence of a 22kHz tone modulated on the supply input to the LNB.Referrring to the following
schematic diagram,the main elements of this detector are an op-amp enabling the construction of a Sallen key
filter,a rectifier/smoother and a comparator.Full control is given over the center frequency and bandwidth of the filter
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