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參數(shù)資料
| 型號： | UTCL8115 |
| 廠商： | 友順科技股份有限公司 |
| 英文描述： | FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION |
| 中文描述： | 場效應(yīng)管偏置控制器，偏振開關(guān)與音調(diào)檢測 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 174K |
| 代理商： | UTCL8115 |
UTC L8115 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
10
QW-R123-005,B
* Stripline Elements
* C1
* L2
* C3
C
4
10nF
Q1
*L1
C2
10nF
C
NB
47nF
C
SUB
47nF
R
1
33k
4.7nF
LNB Downfeed
R2
2k
Rcal
Vpol
Fin
Lov
HB
LB
Csub
G1
D1
C
F1
G2
D2
G3
D3
Gnd
Cnb1
Cnb2
Vcc
UTC L8115
SSOP20(150mil)
1
Vcc
N/C
NC
NC
SSOP20(150mil) Applications circuit
The following block diagram shows the main section of an LNB designed for use with the Astra series of
satellites. The UTC L8115 is the core bias and control element of this circuit. The UTC provides the negative rail,
FET bias control, polarisation switch control, tone detection and band switching with the minimum of external
components. Compared to other discrete component solutions the UTC circuit reduces component count and
overall size required.
Single Universal LNB Block Diagram
UTC L8115
Regulator
Vertical
Antenna
Gain Stage
GaAs/HEMTFET
2
Polarity Switch &Tone Detect Input
Gain Stage
GaAs/HEMTFET
3
Mixer
Gain Stage
ASTRA
Universal Band
10.70GHz-12.75 GHz
Horizontal
Antenna
1
Gain Stage
GaAs/HEMTFET
Band
Switch
Output
Local Osc 1
9.75 GHz - Low Band
Local Osc 2
10.6GHz - High Band
IF down feed
950-2050 MHz - Low Band
1100 - 2150 MHz - High Band
+
Tone detection and band switching is provided on the UTC L8115 devices. The following diagrams describes
how this feature operates in an LNB and the external components required. The presence or absence of a 22kHz
tone applied to pin F
IN
enables one of two outputs, L
B
and H
B
. A tone present enables H
B
and tone absent enables
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