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參數資料
| 型號： | Q62702-B792 |
| 廠商： | SIEMENS AG |
| 英文描述： | Silicon Variable Capacitance Diode (For VHF Hyperband TV/TR tuners High capacitance ratio Low series resistance) |
| 中文描述： | 硅變容二極管（甚高頻Hyperband電視/訓練班調諧器，高容量的比例低串聯電阻） |
| 文件頁數： | 5/11頁 |
| 文件大小： | 101K |
| 代理商： | Q62702-B792 |
BGC420
High Frequency Products
5
Edition A13, 05/99
Typical Application
Remarks:
1)
2)
3)
4)
To provide low frequency stability C2 should be 10 times C3.
Be aware that also coupling capacitors determine the switching times.
The collector current at Q1 can be estimated by Ic=0.6V / Rx[
W
].
Place C2 as close to the device as possible.
D1
D2
R1 (47k)
Q2
R2 (500R)
R3
10k
R4 (2k7)
Q1
Vc,8
Vb,3
GND,7,2
RFin,1
RFout,6
Vr,5
Vcc,4
on
off
C2, 1nF
L1,100nH
C3, 100pF
Rx
3
C4,150pF C5,100nF
Figure 1. Typical Application and Internal Circuit
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