I was thinking of having a few 8085 micro processors generate clock pulses in phase. So will using the a single Xtal for several 8085 work? (Do crystals get loaded? :? )
Can the same feedback network be used to send positive feedback to an array of amplifier to generate wave forums in phase?
I was thinking of having a few 8085 micro processors generate clock pulses in phase. So will using the a single Xtal for several 8085 work? (Do crystals get loaded? :? )
Can the same feedback network be used to send positive feedback to an array of amplifier to generate wave forums in phase?
Create one crystal oscillator on board. Buffer that and match the routing to the 8085's clock inputs. You'll be loading the buffer not the crystal (acceptable) thats about the best you can do for dirt cheap. All 8085's will see clock edge at same time (in phase)
more advanced methods involve PLL's and such or more advanced digital parts like modern FPGA's that have built in DLL/PLL for syncr & phasing.
You dont want to send positive feedback to your amplifiers. Without a "net" negative feedback, you have the potential for oscillation and/or saturation.
If you want general waveforms in phase, just generate the waveforms from a clock networks that are in phase.
Ofcourse it is possible,
the solution (as posted before) is to have crystal running externaly (use 4060 to make external crystal oscilator), then buffer the clock signal and drive all MCUs in paralel with this clock signal, that' all.
I can't comment on the 8085, but on PIC's one oscillator pin is an input, and the other an output (presumably all micros are?) - so you can connect a crystal to one PIC, then connect it's oscillator OUTPUT pin to the oscillator INPUT pin of the next PIC. I'm not sure if you can chain then more than that or not, I'm only going from vague memories of an OLD PIC datasheet.
I can't comment on the 8085, but on PIC's one oscillator pin is an input, and the other an output (presumably all micros are?) - so you can connect a crystal to one PIC, then connect it's oscillator OUTPUT pin to the oscillator INPUT pin of the next PIC. I'm not sure if you can chain then more than that or not, I'm only going from vague memories of an OLD PIC datasheet.
Nigel, on PICs the output is Fosc/4 , therefore other devices will be 4 times slower! (If you use clock-in oscilator mode), maybe XT would work as you suppose?
I can't comment on the 8085, but on PIC's one oscillator pin is an input, and the other an output (presumably all micros are?) - so you can connect a crystal to one PIC, then connect it's oscillator OUTPUT pin to the oscillator INPUT pin of the next PIC. I'm not sure if you can chain then more than that or not, I'm only going from vague memories of an OLD PIC datasheet.
Nigel, on PICs the output is Fosc/4 , therefore other devices will be 4 times slower! (If you use clock-in oscilator mode), maybe XT would work as you suppose?
OK, I checked their datasheet out and I must say you are right
I don't work with these old PICs so I had no clue (I though only 12bit PICs doesn't have Clock in/out). Anyways Thanks!
I was thinking of having a few 8085 micro processors generate clock pulses in phase. So will using the a single Xtal for several 8085 work? (Do crystals get loaded? :? )
Can the same feedback network be used to send positive feedback to an array of amplifier to generate wave forums in phase?
uhh, why use an 8085? Why can't you just make a square-wave oscillator and have two devices running off the same output? After all, everything tied to one output is in phase with each other.
Ofcourse it is possible,
the solution (as posted before) is to have crystal running externaly (use 4060 to make external crystal oscilator), then buffer the clock signal and drive all MCUs in paralel with this clock signal, that' all.
Ofcourse it is possible,
the solution (as posted before) is to have crystal running externaly (use 4060 to make external crystal oscilator), then buffer the clock signal and drive all MCUs in paralel with this clock signal, that' all.