[PSES] RFID antenna parasitic resonances affect operation

2013-09-07 Thread Doug Smith
Hi Everyone, I just posted my Technical Tidbit for September 2013 on how parasitic resonances in ane RFID antenna can affect RFID operation and how to measure these parasitic resonances as well as an example. Technical Tidbit - September 2013

Re: [PSES] Spark Gap PCB Layout on AC Mains

2013-09-07 Thread ce-test, qualified testing bv - Gert Gremmen
That depends of course how the transient/surge has been coupled into the mains. If that is due to a ligtning event at a short range, the impedance may be much less. Your analysis is right when the even has been generated far away. Regards, Ing. Gert Gremmen, BSc . -Oorspronkelijk be

Re: [PSES] Spark Gap PCB Layout on AC Mains

2013-09-07 Thread John Woodgate
In message , dated Sat, 7 Sep 2013, "ce-test, qualified testing bv - Gert Gremmen" writes: Anyway, the primary circuit always need to be build for high surge currents, and one should always insert induction to limit surge currents. As the impedance of the spark gap is low, only a small amo

Re: [PSES] Spark Gap PCB Layout on AC Mains

2013-09-07 Thread ce-test, qualified testing bv - Gert Gremmen
The First Google hit . http://www.littelfuse.com/products/gas-discharge-tubes/high-voltage-gdt.aspx (no connections with them) Anyway, the primary circuit always need to be build for high surge currents, and one should always insert induction to limit surge currents. As the imped