Re: Reversed Biased MOSFETS & BJT's?

ian field wrote:
> "ehsjr" <ehsjr@[EMAIL PROTECTED]
> wrote in message 
> news:N%qTk.1442$mi4.1337@[EMAIL PROTECTED]
> 
>>RogerN wrote:
>>
>>>I'm working on a battery charger / discharger design.  There is always 
>>>the possibility that someone will connect a battery reverse polarity. 
I 
>>>don't want this to destroy the charger.  I remember the stuff about 
>>>correctly biasing transistors but how will a BJT or MOSTES act if you 
>>>have Collector Emitter or Drain Source reverse biased?  I'm trying to 
>>>avoid diodes in the discharge circuit unless the are required as I want

>>>to be able to dicharge to 1V while measuring current and voltage.
>>>
>>>I tried this on simulation and it seems to work (not conduct) but I
don't 
>>>know if the simulation is realistic with reverse bias.  I can also get
a 
>>>1A diode to work at 500A in simulation.
>>>
>>>Thanks!
>>>
>>>RogerN
>>>
>>>
>>
>>Sense the battery voltage with a comparator - if correct
>>polarity, energize a relay that connects the remainder of
>>the circuit to the battery.
>>
>>Ed
> 
> 
> It took you over a month to read my reply and pinch my idea! 
> 
> 

Sorry - I didn't see your reply.

Ed