[Laser] TX Circuit for high speed data.
F1AVYopto at aol.com
F1AVYopto at aol.com
Sun Jul 1 13:21:15 EDT 2007
>Yves,
>Thank you for the info. I will go at it and do the changes. The output that
>is driving the gate is presently coming from a 74HC04. It is buffering the
>output of a UART. I was able to get the whole thing to switch at 10Mhz
>nicely last night, but that was eliminating the 1K resistors.
Chuck
If you drive the K3PGP laser modulator from a 74HC04, the maximum current
you can use from this inverter is 20 mA for one output.
With a 5 V psu on this 74HC04, two 330 ohms in place the two 1K in the laser
driver will give safe limiting loads.
5K in place the 100K resistor seems a good and safe value to improve the
response time.
73 Yves F1AVY
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