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High Frequency Switch (2N4391)

2015-10-09 17:31  
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This article describes the High Frequency Switch (2N4391). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:2N4391.

This is high frequency switch circuit. This circuit uses the 2N4391. When it is off, it will provide a high off-impedance (<0.2pF) and low on-resistance of 30 ohm. Here is the circuit :

High Frequency Switch circuit schematic diagram

This circuit has attenuation > 80dB @ 100 MHz and insertion loss about 6 dB. It can be immediately achieved if we use an “ideal” switch and proper layout.

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