Memristive Multilevel Memory with Applications in Audio Signal Storage

Memristor, a two-terminal device with dynamic conductance depending on the charge or the flux flowing it was predicted by Leon Chua about four decades ago and named the fourth fundamental circuit element. In 2008, Hewlett Packard (HP) laboratory announced they have found the missing memristor in nano-scale physical device. Since that memristor has garnered extensive interests among numerous researchers and proposed in many applications. In this paper, an implement scheme of a memristive multilevel memory with a single unit storing a bit multilevel information (several bits of binary data) is presented. A record/play system with the memristive multilevel memory is designed as an application in audio signal storage. Due to the multilevel memory ability and nano-scale size of the memristor, this design possesses simpler, smaller circuit structure, greater data density and nonvolatile. A series of computer simulations verify the effectiveness of the memristive memory and provide a new solution for audio signal storage and processing.