Leonid83
03-20-2006, 05:45 PM
Please email me or post your answer here asap! Thanks a lot!
1.Why do we need 555 timer circuit in a parallel input serial output register?
2.A ring counter is also a shift register. In what way does it function as one?
3.Why do we include a RC network to the input of ring counters?
Regards..
Papabravo
03-20-2006, 05:56 PM
Originally posted by Leonid83@Mar 20 2006, 02:45 PM
Please email me or post your answer here asap! Thanks a lot!
1.Why do we need 555 timer circuit in a parallel input serial output register?
2.A ring counter is also a shift register. In what way does it function as one?
3.Why do we include a RC network to the input of ring counters?
Regards..
Quoted post
Your questions are a bit ambiguous and lack meaningful context. I will try to answer them in spite of those difficulties.
1. A 555 timer is not required in a parallel input serial output register, but some kind of clock signal is required to tell the shift register when to shift.
2. Each stage of a ring counter takes its input from the previous stage or is a function of the state of the previous stage. The last stage is usually inverted and fed back to the first stage. The relationship between a ring-counter and a shift register is superficial at best.
3. Any RC network that you see in a digital context is designed to produce a delayed version of its input, or is intended to make the input more immune to noise. Without a circuit diagram it is hard to say what the designer had in mind.