Hi all, I need to have a input signal of 50Mhz TTL to my MCU.
But so far, i am only using a LM339 Comparator which can give me only up to 300Khz. Is there are type of chip which is fast enough ? or any cct can i can use to give me up to 50MHz ??
Thanks a lot
Dear friend
Why don't you use Crystal or Oscillator to do the job. It's easy and takes little space on your board. Go to Mouser or Digikey websites. They have ton of them.
Hope it helps.
T.L
Here is a link to 50MHz frequency counter: http://lea.hamradio.si/~s57nan/ham_radio/fc_led_2/fcl2.html
(circuit schematic included)
The input is based on BF transistor followed by 74132 schmidt trigger gates ..
You can use the same concept in your project ..
is this PIC can run on speed 50MHz, this speed is minimal speed to capture 50MHz signal.
I think you must use frequency divider, so speed of PIC can capture frequency of signal input.