ECE734 Project Presentation Conditioned Reflex Mimic Circuit Design

1. ECE734 Project PresentationConditioned Reflex Mimic Circuit Design Gengyu Yang 2013.5.10

2. Outline • Introduction • Digital Circuit Design • Circuit Design Using RRAM • Comparison and Discussion • Conclusion

3. Outline • Introduction • Pavlov’s dog • RRAM and memristor • Digital Circuit Design • Circuit Design Using RRAM • Comparison and Discussion • Conclusion

4. Introduction – Pavlov’s dog • Ivan Petrovich Pavlov was a famous Russian physiologist • Pavlov's dog are classical conditioning experiments using dogs by the Russian physiologist Ivan Pavlov

5. Introduction – Pavlov’s dog • Three phases of the experiment • (1) before learning phase: the output of the circuit, which will be used to simulate the strength of salivation, will generate value only associated with the food visual input signal but not with the ringing bell sound input signal. • (2) learning phase: when a bell was rung in subsequent time with food being presented to the dog in consecutive sequences, the dog will initially salivate when the food is presented. The dog will later come to associate the ringing of the bell with the presentation of the food and salivate upon the ringing of the bell. • (3) after learning phase: the output of the circuit will generate value associated with both the food visual input signal and the ringing bell sound input signal.

6. Introduction – RRAM & Memristor • RRAM, a kind of novel memory • small area, non-volatile, simple MIM crossbar structure, fast switching, low power consumption, compatibility with CMOS process, simple fabricating process • Multilevel -- memristor 17 RRAM memories under atomic force microscope

7. Outline • Introduction • Digital Circuit Design • Circuit Design Using RRAM • Comparison and Discussion • Conclusion

8. Simple version

9. Simple version

10. Circuit with food weight update

11. Circuit with food weight update

12. Circuit with inhibitory mechanism

13. Circuit with food weight update

14. Outline • Introduction • Digital Circuit Design • Circuit Design Using RRAM • Comparison and Discussion • Conclusion

15. Simple version

16. Simple version

17. Complex version

18. Outline • Introduction • Digital Circuit Design • Circuit Design Using RRAM • Comparison and Discussion • Conclusion

19. Area Analog circuit: 9 transistors 2 resistances 2 RRAM devices Total: the same area as 9 transistors Digital circuit: 2 1-bit D flip flop, 48 transistors 2 adders: OR gate, 8 transistors 2 multipliers: AND gate, 8 transistors AND gate: 4 transistors Total: 68 transistors a positive edge trigged 1 bit D flip-flop

20. Non-volatile memory & power consumption • RRAM: non-volatile, pJ/spike (biological competitive) • Digital circuit: needs to introduce other memory system to implement non-volatile memory, power problem

21. Outline • Introduction • Digital Circuit Design • Circuit Design Using RRAM • Comparison and Discussion • Conclusion

22. Conclusion • Implement conditioned reflex mimic circuit • 3 versions of digital circuit • 2 versions of circuit using RRAM • Circuits using RRAM have better performance regarding area, non-volatile memory, and power consumption

23. Thank you! & Questions?