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125 kHz RFID Reader - changpuak.ch
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125 kHz RFID Reader
• This circuit is used here : Coffee Tally Sheet • Kaffee-Strichliste
Reading RFID-badges operating at 125 kHz is very easy. You just have to put a carrier (125 kHz)...
Related topics : 125 khz rfid tag reader / 125 khz rfid tag / rfid reader circuit 125khz / 125khz rfid reader software / rfid tag and reader circuit
Direct Coupled Resonator Bandpass Filter Designer
Inspired by the paper " Direct-Coupled Resonator Filters " by Seymour B. Cohn, June 1956.
If you want to build a filter like this one, we highly recommend, that you simulate the amplitude response first ! Due to the capacitive coupling, the attenuation above the passband is rather poor if you choose the bandwidth too large. We suggest to start with a bandwidth not larger than 10 %.
Example...
Related topics : rf wire wound chip inductors / murata rf chip inductors / rf chip inductor
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