So I need to build a Digital Integrator by around May next year. Most of the classes I've taken are Analog based, so I have little background in digital design. Though I like a good challenge.
The prompt for my project can be found here:http://www.csun.edu/~ih20409/SCHOOL1/digintegrator.pdf
Now I am by NO means asking for someone to do this project for me. Obviously. I could just use a few words of advice, and I have tons of questions to ask since my prompt is very vague.
The basic components of this Digital Integrator are composed of: an 8-bit Up/Down counter, 8-bit adder, and an 8-bit register. As far as I can understand, the 8-bit U/D counter counts up when the input is Positive, and Down when the input is negative. That count gets added into a register and feedback to be added with the next count to accumulate an integral. I plan to use 7400 series IC's, unless anyone else has any better suggestions.
I found this program called Multisim that is available for use at my school, and I think I plan to use it to test my designs. The interconnections of the IC's are troubling me, though. Even after looking at datasheets for these IC's I can't determine what a lot of the pins are for. For example, the EOC pin on the ADC in multisim. I also am not sure I 100% sure how my circuit is supposed to work regarding the inputs. I know I need to load in the initial conditions into the counter using a switch, but I'm not sure what my input signal is going to be, or how to make an initial condition of 32 with a switch.
Let me just ask some questions to keep this organized:
Question 1: Here is my first design of the basic 8-bit integrator
http://puu.sh/rStmF/f93aebf2b5.png,
and my output: http://puu.sh/rStk7/467b9d314f.jpg
How can I debug this circuit? I am getting basically a flat line as my output, and I'm not sure where to start debugging it.
Question 2:
Are there any major flaws with my circuit?
Question 3:
What is the difference between the normal ground, and the reference ground in Multisim? (Same goes for VCC and Regular Power Supplies).
Question 4:
Are there any good 8-bit IC's I can use to replace the 7400 series ones? I think that would simplify my connections a lot.
Any advice or help you can possibly give would be greatly appreciated.
The prompt for my project can be found here:http://www.csun.edu/~ih20409/SCHOOL1/digintegrator.pdf
Now I am by NO means asking for someone to do this project for me. Obviously. I could just use a few words of advice, and I have tons of questions to ask since my prompt is very vague.
The basic components of this Digital Integrator are composed of: an 8-bit Up/Down counter, 8-bit adder, and an 8-bit register. As far as I can understand, the 8-bit U/D counter counts up when the input is Positive, and Down when the input is negative. That count gets added into a register and feedback to be added with the next count to accumulate an integral. I plan to use 7400 series IC's, unless anyone else has any better suggestions.
I found this program called Multisim that is available for use at my school, and I think I plan to use it to test my designs. The interconnections of the IC's are troubling me, though. Even after looking at datasheets for these IC's I can't determine what a lot of the pins are for. For example, the EOC pin on the ADC in multisim. I also am not sure I 100% sure how my circuit is supposed to work regarding the inputs. I know I need to load in the initial conditions into the counter using a switch, but I'm not sure what my input signal is going to be, or how to make an initial condition of 32 with a switch.
Let me just ask some questions to keep this organized:
Question 1: Here is my first design of the basic 8-bit integrator
http://puu.sh/rStmF/f93aebf2b5.png,
and my output: http://puu.sh/rStk7/467b9d314f.jpg
How can I debug this circuit? I am getting basically a flat line as my output, and I'm not sure where to start debugging it.
Question 2:
Are there any major flaws with my circuit?
Question 3:
What is the difference between the normal ground, and the reference ground in Multisim? (Same goes for VCC and Regular Power Supplies).
Question 4:
Are there any good 8-bit IC's I can use to replace the 7400 series ones? I think that would simplify my connections a lot.
Any advice or help you can possibly give would be greatly appreciated.