Distributing Output from a Pulse Generator
Distributing Output from a Pulse Generator
(OP)
I need to distribute a 1MHz to 10MHz, 50% duty cycle TTL signal coming from a pulse generator. I need to switch between 5 - 8 different outputs. The propagation delay needs to be very small less than <=5nsec through the device. I have become over whelmed with the amount of choices and became very confused with which IC chip would provide the best solution or maybe a relay? I am aware that a relay would time time to setup which is ok. But once the channel is turned on it needs to have a minimal impact on the signal.





RE: Distributing Output from a Pulse Generator
How about a good old fashioned 12-position rotary switch with a knob? You would have to wire it up with some basic attention to impedance matching, but it's not that difficult if you know what you're doing (regarding characteristic impedance and what affects it).
If you need a "more professional" solution (as opposed to home brewing a rotary switch), then there are many mechanical switch matrix devices available. They're typically a metal box with a bunch of coaxial connectors lined-up on various sides. And then some low voltage terminals for the control lines. Probably many hundreds of dollars each.
RE: Distributing Output from a Pulse Generator
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If we learn from our mistakes I'm getting a great education!
RE: Distributing Output from a Pulse Generator
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Since this will be part of an ATE. I want to find an IC that could be controlled through our computer. We currently use a toggle switch to flip from channel to channel but really want a complete automate measurement. Still new to the site. I will upload a test setup diagram later.
RE: Distributing Output from a Pulse Generator
Bill
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"Why not the best?"
Jimmy Carter
RE: Distributing Output from a Pulse Generator
Unfortunately propagation delays are a few ns higher that the 5 ns requirement you specified, but you may consider the most part of the delay as fixed and take it into consideration when calculating the delay time of your pin-switches.
Take into consideration that for timing in the ns-range also cable lenght and termination my have important impact.
RE: Distributing Output from a Pulse Generator
Try the Vishay/Siliconix wvsite for more informantion.
Cheers,
Benta.
RE: Distributing Output from a Pulse Generator
RE: Distributing Output from a Pulse Generator
RE: Distributing Output from a Pulse Generator