In this chapter, two astable oscillators are introduced by making use of memristor and memcapacitor emulators, respectively. First, the oscillating characteristics of an astable multivibrator based on flux-controlled memristor emulator and 555 timer are explored. Then, another astable oscillator is newly implemented based on one floating memcapacitor emulator and two NOT gates. The inclusion of memristor or memcapacitor in the astable oscillators provides a new option allowing for large degree of flexible control over frequency as well as duty ratio.

Chapter Contents:

• 4.1 Introduction
• 4.2 Circuit schematic of floating memristor emulator
• 4.3 Theoretical analysis of memristive astable multivibrator
• 4.3.1 Discharging interval
• 4.3.2 Charging interval
• 4.4 Simulation validation for memristive astable multivibrator
• 4.4.1 Testing the memristor emulator
• 4.4.2 Observing the oscillation of memristive astable multivibrator
• 4.5 Memcapacitor-based astable oscillator circuit
• 4.6 Simulation validation for memcapacitive astable multivibrator
• 4.7 Conclusion
• References

Inspec keywords: oscillators; memristor circuits; multivibrators; logic gates; capacitors

Other keywords: floating memcapacitor emulator; memristive; memcapacitor emulators; memcapacitive astable multivibrators; flux-controlled memristor emulator; flexible control; astable oscillators; NOT gates; 555 timer

Subjects: Logic circuits; Capacitors; Oscillators; Pulse circuits; Resistors