поискавой системы для электроныых деталей |
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VMMK-3603-TR1G датащи(PDF) 8 Page - AVAGO TECHNOLOGIES LIMITED |
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VMMK-3603-TR1G датащи(HTML) 8 Page - AVAGO TECHNOLOGIES LIMITED |
8 / 10 page 8 Figure 14. Biasing the VMMK-3603 Figure 12. Evaluation/Test Board (available to qualified customers upon request) VMMK-3603 Applications and Usage Information Table 3. VMMK-3603 Demo Board BOM Component Value DUT VMMK-3603 C1 100 pF C2 8.2 pF C5 0.1 μF C6 100 pF R1 820 Ohms R2 10 Ohms L1 10 nH Biasing and Operation TheVMMK-3603 is biased with a positive supply connected to the output pin Vd through an external user supplied bias decoupling network. Nominal current draw is 22 mA. A typical biasing scheme is shown in Figure 12. Figure 13. Example demonstration circuit of VMMK-3603 for broadband operation (1 GHz to 6 GHz). A layout of a typical demo board is shown in Figure 14. The output bias decoupling network can be easily constructed using small surface mount components. The value of the output inductor can have a major effect on both low and high frequency operation. The demo board uses a 10 nH inductor that has a self resonant frequency higher than the maximum desired frequency of operation. If the self-resonant frequency of the inductor is too close to the operating band, the value of the inductor will need to be adjusted so that the self-resonant frequency is sig- nificantly higher than the highest frequency of operation. A 10 ohm resistor is placed in series with the inductor to help provide greater bandwidth and to help with low frequency stability. To help with low frequency stability an 820 ohm resistor is used to shunt the input line to ground. 8.2 pF capacitors are used as dc blocks on the RF input and RF output lines. Typically a passive component company like Murata does not specify S parameters at frequencies higher than 5 or 6 GHz for larger values of inductance making it difficult to properly simulate amplifier performance at higher fre- quencies. It has been observed that the Murata LQW15AN series of 0402 inductors actually works quite well above their normally specified frequency. The parallel combination of the 100 pF and 0.1 μF capaci- tors provide a low impedance in the band of operation and at lower frequencies and should be placed as close as possible to the inductor. The low frequency bypass provides good rejection of power supply noise and also provides a low impedance termination for third order low frequency mixing products that will be generated when multiple in-band signals are injected into any amplifier. Amp Input Vdd Output Output Pad Ground Pad Input Pad 50 Ohm line 50 Ohm line 100 pF 0.1 µF 10 nH 8.2 pF 820 8.2 pF 10 |
Аналогичный номер детали - VMMK-3603-TR1G |
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Аналогичное описание - VMMK-3603-TR1G |
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