verilog code about shift phase 0, 90, 180, 270

[Altera_Forum]

I have 4 signals come high at the same time and also go low at the same. Now I want to shift the 2nd, 3rd, and 4th signals out to 90, 180, and 270 degree. Does anybody has any good pointers or how to do this? I have only one clock.

[Altera_Forum]

If this is a homework problem and you are truly limited to one clock, they may be looking for you to derive your own clocks using a single clock at a rate 4x what you need. 

 If this is a real application, then the answer is you probably want to feed your one clock into an ALTPLL to produce at least two clocks (for 0 and 90 degree phase shift) and then use both edges of each of those clocks to produce the 180 and 270 degree transitions.

[Altera_Forum]

Thanks ted, 

 This is for my real application. I am doing DC-DC converter. Where can I find sample in verilog to apply this? I have one clock and have 4 signals output at the same time. I want to phase them out equally.

[Altera_Forum]

The question refers to your PWM generation method. Multiphase PWM signals can be generated the same way as single phase, involving a system clock, a counter respectively multiple counters and comparators.

[Altera_Forum]

Thanks FvM, 

 You're right on it. I think I get the counter and comparator to work for each signal. Now, I need to shift them out 90, 180, 270 degree to get full power of the system. Do you know how to do that?

[Altera_Forum]

As said, depends on the PWM generation details.  

 May be an offset added to the counter or different synchronization of the zero startpoint of each counter.

[Altera_Forum]

FvM, 

 Do you have any sample in Verilog? I like the offset added to the counter.