MIDI-Thru problem ?

[René Schmitz]

At 18:27 10.12.00 -0000, you wrote:
>
>>
>> I decreased the value to 220 Ohms, and the delay dropped to 2 us, and
>> nov everything works correctly.
>> Now i will have to look un the 6N138 datasheets for the max. collector
>current
>> of the output transistor, maybe i could safely reduce the resistor to say
>100 ohms
>> to improve that behaviour even more.
>>
>
>No, don't reduce the resistor to this value. The current will be excessive.
>Anything below 1K and the 5V rail is gonna be banged hard causing excessive
>noise on this rail.
>

I've wondered for quite some time if a speedup could be archeived by using
an active collector load (e.g. a FET current source). Could be also useful
for other situations where fast edges need to be generated from an open
collector output.

Anyone?

Bye,
 René

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159