| Electronics > Projects, Designs, and Technical Stuff |
| Low-leakage triac or solid-state relay |
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| Zero999:
--- Quote from: perieanuo on December 14, 2018, 04:32:49 pm --- --- Quote from: Hero999 on December 14, 2018, 01:44:21 pm --- --- Quote from: CodyDowling on December 13, 2018, 03:15:20 am --- --- Quote from: perieanuo on December 09, 2018, 12:39:03 pm ---Hi, Do you mentioned frequency involved? Regards,pierre ... --- End quote --- I didn't but, ideally, I'd like to be able to get very high impedance up to 100kHz. The RF components seem like they shouldn't start really leaking until much higher, so I thought that might be a good jumping off point. --- End quote --- I'm confused. Do you want to switch 100kHz current with this relay? Or do you just need it to not leak a 100kHz applied between the control and load circuits? A TRIAC is no good for switching a 100kHz current and MOSFETs will leak a considerable amount, at that frequency. You need a reed relay to switch that frequency current. --- End quote --- As I already excluded reed in my earlier post (I understood the signal needed to be switched at high freq,reed can't do quick, not that the signal itself has 100k). I give up... In fact hero999 is right if signal is HF and commutation speed is slow, very slow. I need a coffee :) and clearer specs, which f for signal,which bandwidth for signal to be commuted... Envoyé de mon iPad en utilisant Tapatalk --- End quote --- Yes, I did notice that, but it confused me. Where did he say he wanted to switch the signal at 100kHz? It seems more like he wanted to switch a 100kHz signal, at a low frequency. To chop a DC or AC signal up at 100kHz, with isolation, use a couple of MOSFETs driven by a pulse transformer. You're right. We need a better specification. |
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