OK, since it seems that no-one is submitting anything, I have made a big change to the rules.
The new goal of this project is to develop the fastest oscillator you can in the most creative and inventive way you can.
What counts as creative and inventive? One example I came up with was hijacking the PLL in a CPU from a computer (e.g. a Pentium 4) to generate a ~3 GHz clock signal. For this example, just showing the theory and wiring diagram would be enough to win you super geek cred.
What doesn't count? Using a 20 GHz transistor as... well... a 20 GHz oscillator. Using components for their actual purpose is not creative and inventive. It can work, but it won't win.
Closing date Sep 30th. I will judge not only on the highest frequency, but the most creative and inventive way to reach that frequency.
------ OLD POST BELOW ------
Here is an idea for a forum project.
The goal is to make the fastest oscillator using commodity parts.
The parts you are allowed:
Each time we must reach a higher goal.
The output need not be a square wave. It can be a sine wave or any kind of repeating cycle.
I'll start with my submission of ~39 MHz from a 74LSxx: http://forum.allaboutcircuits.com/showthread.php?t=42096
Next person has to submit a circuit which can go faster than 39 MHz. To prove the circuit is working please show a simulation or a scope trace.
The new goal of this project is to develop the fastest oscillator you can in the most creative and inventive way you can.
What counts as creative and inventive? One example I came up with was hijacking the PLL in a CPU from a computer (e.g. a Pentium 4) to generate a ~3 GHz clock signal. For this example, just showing the theory and wiring diagram would be enough to win you super geek cred.
What doesn't count? Using a 20 GHz transistor as... well... a 20 GHz oscillator. Using components for their actual purpose is not creative and inventive. It can work, but it won't win.
Closing date Sep 30th. I will judge not only on the highest frequency, but the most creative and inventive way to reach that frequency.
------ OLD POST BELOW ------
Here is an idea for a forum project.
The goal is to make the fastest oscillator using commodity parts.
The parts you are allowed:
- Any 74xx/40xx chip without an on-chip an oscillator.
- All passive components: resistors, capacitors, inductors and so on.
- Active components: transistors, diodes.
- 555 timer including CMOS variants.
Each time we must reach a higher goal.
The output need not be a square wave. It can be a sine wave or any kind of repeating cycle.
I'll start with my submission of ~39 MHz from a 74LSxx: http://forum.allaboutcircuits.com/showthread.php?t=42096
Next person has to submit a circuit which can go faster than 39 MHz. To prove the circuit is working please show a simulation or a scope trace.
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