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- Eero Lehtonen, Mika Laiho
- NANOARCH
- 2009

In this paper computation with memristors is studied in terms of how many memristors are needed to perform a given logic operation. It has been shown that memristors are naturally suited for performing implication logic (combination of implication and false operation) instead of Boolean logic. Also, it should be noted that a memristor can be used as both a… (More)

- E. Lehtonen, J. H. Poikonen, M. Laiho
- 2012 13th International Workshop on Cellular…
- 2012

In its elementary form, memristive implication logic suffers from multiple disadvantages such as the lengths of the computational sequences required to synthesize a Boolean function, the lack of fan-out, and the requirement of complex control signals. In this paper we present a new stateful logic operation available for rectifying memristors which… (More)

A synapse is essentially a programmable wire used to connect groups of neurons together. The human brain possesses approximately 10 billion neurons, each of which has direct synaptic connections to approximately 10,000 neurons. Neuromorphic computers aimed at mimicking biological computation, and which have numbers of neurons and synapses approaching… (More)

- E. Lehtonen, M. Laiho
- 2010 12th International Workshop on Cellular…
- 2010

In this paper we consider using memristors to implement the neighborhood connections of a CNN. First the benefits and drawbacks of using memristors as programmable CNN weights are described. Then, an existing memristor model is improved to allow full-scale simulation of the design. The new model is implemented in the SPICE simulation environment and is not… (More)

- M. Paavola, M. Saukoski, M. Laiho, K. Halonen
- 2007 18th European Conference on Circuit Theory…
- 2007

In this paper, a nanopower CMOS frequency reference designed with a 0.25-mum BiCMOS process for an ultra- low-power capacitive sensor interface is presented. Due to the low supply voltage of 1 V, two parallel frequency references based on source-coupled CMOS multivibrators are used to implement the two required operating modes. In mode 1, when driving a 1… (More)

- Jussi H. Poikonen, Eero Lehtonen, Mika Laiho
- IEEE Transactions on Computer-Aided Design of…
- 2012

We determine an explicit procedure for representing any Boolean expression in a recursive form which can be realized using memristive devices, and demonstrate how the truth value of any Boolean expression can be determined using no more than two computing memristive devices. We present an algorithm which can be used to significantly reduce the number of… (More)

- Mika Laiho, Ari Paasio, Jacek Flak, Kari Halonen
- IEEE Trans. on Circuits and Systems
- 2008

- Ari Paasio, Jacek Flak, Mika Laiho, Kari Halonen
- ISCAS
- 2004

- Janne Maunu, Mika Laiho, Ari Paasio
- IEEE Trans. on Circuits and Systems
- 2008

- Mika Laiho, Eero Lehtonen
- ISCAS
- 2010

This paper describes a cellular nanoscale network cell structure that is aimed to be built as a CMOS-nanomemristor hybrid. The processing cell uses memristors as ON-OFF programmable synapses, local logic and memory. Local logic is based on memristor computations using material implication. Only 15 CMOS transistors per cell are used, independent of the size… (More)