# A simple way to shift TTL signal by 45 degrees?

Discussion in 'General Electronics Chat' started by Peter Pan, May 13, 2010.

1. ### Peter Pan Thread Starter Senior Member

Mar 24, 2005
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0
Hello,

In digital circuits there is a simple way to shift a signal by 180 degree by passing it through invertor and I wonder if there any (perhaps a bit more complex) way to shift such signal by 45 degrees?

Thank you.

Apr 5, 2008
17,159
3,015

Long time no see.
Welcome back.

For 45 degrees you can multiply the frequency with 8 and decode the wanted signals.
The multiplication can be done using a PLL.

Greetings,
Bertus

3. ### Peter Pan Thread Starter Senior Member

Mar 24, 2005
122
0
Hello Bertus,

Thank you. I really was off for a while but glad to be back and hear from you! It helps.

4. ### Wendy Moderator

Mar 24, 2008
21,013
2,745
You can also turn the signal into a triangle wave with a integrator (which moves it 90°), then feed it to a comparator. Its not TTL, but it can feed TTL. It is definitely analog, but simple.

5. ### rjenkins AAC Fanatic!

Nov 6, 2005
1,015
69
If it's a signal based on a regular clock interval (like a serial data stream), you can feed it in to a shift register that is clocked at a much higher frequency.

The various stages of the shift register will have progressively larger phase delays compared to the input signal.

6. ### Peter Pan Thread Starter Senior Member

Mar 24, 2005
122
0
Thank you very much for helpful replies!

7. ### russ_hensel Distinguished Member

Jan 11, 2009
821
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If a signal is not periodic there is not much meaning to phase ( except perhaps 180 ).

8. ### Ron H AAC Fanatic!

Apr 14, 2005
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Unnhhh, I think that's going to yield 90 degrees phase shift, not 45.

Mar 24, 2008
21,013
2,745
Opps......