hi tars,
Welcome to AAC.
What frequency range do you have in mind.?
E
yeah its a square wave but i need some ideas just using some basic components,If you are happy with square waves, use a shift register and an inverter to make a twisted ring Johnson counter.
Basically, the SR fills up with ones, then zeros shift in to over write. The output frequency will be /4 of the clock frequency.
https://en.wikipedia.org/wiki/Ring_counter
Hi,Hello,
What shape should the signals have?
If they are square waves, there might be some possibilities.
Bertus
Thank you so much Marley. I thought about it too, but i need something in basic component level may be ( with some caps, transistors, ..).OK. I was a bit hasty with my previous post. Just a simple 4-stage shift register is required. No twist!
The fourth stage is connected back to the first without an inverter.
I have attached a simple circuit using a pair of 4013 dual D flip-flops. This can be done in a single IC.
A reset input sets up the required initial condition - Q1 and Q2 set, Q3 and Q4 cleared.
Then, each clock rotates the sequence through. After 4 clocks the sequence is complete and returns to the initial state.
It can be clocked (rotated) forever. Each Q output is a square wave at a quarter of the clock frequency. Each Q output is a 90deg phase shift from the previous output.
Instead of using the reset input it might be better to use a logic network to generate the shift register input from the 4 outputs. That way, a reset is not required, and should any stage get corrupted, the state will correct itself within 4 clocks.
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