Alt-BEAM Archive
Message #11894
To: 'beam@sgiblab.sgi.com' beam@sgiblab.sgi.com
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Thursday, March 16, 2000 4:45 AM
Subject: RE: H-Bridge
>A word of caution: the latching h-bridge circuits are special designs
>serving as a memory for the last input state.
>
>Ben's simple inverting buffer is inherently safe and recommended for many
>general applications. Note that most h-bridges including Ben's cannot be
>connected directly to the output of Ian's reverser (Mattmux) : the 47K
>output resistance in the reverser non-inverting mode limits available drive
>current. Add an extra 240 inverter between with each reverser output and
the
>h-bridge inputs to fix the problem
>
>wilf
>
>> -----Original Message-----
>> From: Andrew Hooper [SMTP:andrew@best.net.nz]
>> Sent: Tuesday, March 14, 2000 5:39 PM
>> To: beam@sgiblab.sgi.com
>> Subject: H-Bridge
>>
>> I seem to be having trouble with a smokless non latching H-bridge
>> everything i have tried resulted in either a latching H-Bridge or
>> when both inputs were pulled either high or low the bridge would
>> short :(
>>
>> Any thoughts?
>>
>> I was trying out W.Rigter's Smokless latching 4 transistor H-Bridge
>> and remover the 2 resistors that supply the latching current but for
>> some reason that did not work either :(
>>
>> Regards
>> Andrew
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