creating phase delay
creating phase delay
(OP)
anyone have an idea on how to create a phase delay which is variable. Im not talking the start 180 degree flip flops though, but more like 10-20 degrees. I know this is not that hard to do with a u controller but need to try with standard ICs. A 555 comes to mind but I havent been able to get a good solution working.





RE: creating phase delay
Many real world applications would increase the number of pulses per cycle. If you tried to make do with only one pulse per cycle and tried to create a phase delay - and then the period was suddenly accelerated - then there's no method to be accurate in real time. E.g. Radar antenna typically use one Azimuth Reference Pulse (ARP) and a large number of Azimuth Clock Pulses (ACP) per rotation.
Doing all this with basic gates would be a time sink. There are specialist chips for some of this, perhaps in the automotive ignition field?
RE: creating phase delay
Dan - Owner

http://www.Hi-TecDesigns.com
RE: creating phase delay
I was thinking a astable 555 but was unable to get it to work. It seems to always start with the caps charged so there is no phase delay from the rising edge. vice versa, in monostable mode, it just fires on the falling edge.
Any ideas on the time or phase delay?
thanks
RE: creating phase delay
Do you need microsecond to millisecond delays, or do you need nanosecond ("micro-milli"?) delays... a 555 isn't going to get you nanosecond. How accurate/repeatable do the delays need to be? Consider first you're usually working with low-tolerance components with a 555 (caps that are 10%, resistors at 1% before the money starts to increase, etc.), so tight timing is a complete crapshoot.
Why the insistence of using a 555 when a micro will do this without blinking an eye?
Dan - Owner

http://www.Hi-TecDesigns.com
RE: creating phase delay
i think the timing delay and phase delay are somewhat similar if the timing delay can be triggered from a control pulse.. in that manner, it is always a fixed difference from the rising edge. Im not sure how to do this anyway.
I am looking for approximatly microsecond difference in phase delay with a frequency of around 1khz
thanks
RE: creating phase delay
Dan - Owner

http://www.Hi-TecDesigns.com
RE: creating phase delay
It's the forth one down.
http://ww
Keith Cress
kcress - http://www.flaminsystems.com
RE: creating phase delay
i still dont see that a time delay can be used to simulate a change in phase, its periodic with respect to the driving pulse
yes, a microcontroller, i know its pretty simple with it
RE: creating phase delay
I still fail to see why you won't use a microcontroller, particularly since you have admitted it would be easy to do so with one.
Dan - Owner

http://www.Hi-TecDesigns.com
RE: creating phase delay
RE: creating phase delay
http://www.datadelay.com/index.htm
Peter
RE: creating phase delay