#garfield Logs

Jul 27 2024

07:20 PM aandrew: rue_shop2: https://ibb.co/3z97C2H
07:35 PM aandrew: you ever see this gate driver configuration before? Q4 and Q5 are just inverters but wtf is going on with an NPN common collector Q6 and Q7?
07:35 PM aandrew: the only thing I'm seeing online is that this is actually a valid mode of operation and it's used to lower VCEsat because the beta is stupid low
07:50 PM rue_mohr: its two back to back diodes
07:50 PM rue_mohr: the combination of the two transistors
07:50 PM rue_mohr: but
07:51 PM rue_mohr: 3.3k is pretty slow to charge anything
07:52 PM rue_mohr: I think its slow charge, fast discharge
07:52 PM rue_mohr: your sure about Q7?
07:53 PM rue_mohr: because totem pole would make more sense
07:59 PM aandrew: good question