Topband: Vacuum relay hold vs. energizing current components

F3WT ars.f3wt at wanadoo.fr
Mon Apr 2 14:37:55 EDT 2007


Hi all,

  Just incidently I saw recently in a magazine new ICs  doing smart  
relay-driving by energizing first and after switching reducing to  
hold current. But it was    for smaller (reed)relays on pcb, reducing  
very much consumption. Good for TRXs if one doens't want for instance  
switching diodes and related IMD issues  or in automatic tuning  
couplers, etc..
  Wonder whether such ICs do also exist for larger relays  sort of    
mimicking   PE1MWB's nice discrete circuit?
73
Pierre, F3WT






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