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I was using a test board I designed to measure component level radiated emissions. During the measurements I started to suspect that some of the emissions were coming from the test board. The only ...
Figure 1 shows how a Sallen-Key high pass filter (HPF), can be switched on/off using only one extra transistor and resistor. Figure 1 A Sallen-Key HPF filter topology that can be switched on/off using ...
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