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On the VLSI implementation of adaptive-frequency hopf oscillator

On the VLSI implementation of adaptive-frequency hopf oscillator
On the VLSI implementation of adaptive-frequency hopf oscillator
In this paper, a new VLSI implementable Hopf oscillator with dynamic plasticity is proposed for next-generation portable signal processing application. A circuit-realizable piece-wise linear function has been used to govern the frequency adaptation characteristic of the proposed oscillator. Furthermore, a straightforward method is suggested to extract the frequency component of the input signal. Mathematical model of the oscillator is derived and it is shown, using VHDL-AMS model, that despite using a new nonlinear function, the oscillator exhibits the same characteristics and learning behavior as the original one with improved learning time. Subsequently, an equivalent circuit model and transistor level implementation for the oscillator is suggested and the mathematical model is confirmed with system and circuit level simulations. Capability of such oscillator to extract frequency futures without doing explicit signal processing is shown with examples of both synthetic and real-life EMG signals.
1549-8328
1076-1088
Ahmadi, Arash
c88cc469-b208-4dad-9541-af5e555e0748
Mangieri, Eduardo
11b9b0b2-24c1-44c0-975c-7aa50937259e
Maharatna, Koushik
93bef0a2-e011-4622-8c56-5447da4cd5dd
Dasmahapatra, Srinandan
eb5fd76f-4335-4ae9-a88a-20b9e2b3f698
Zwolinski, Mark
adfcb8e7-877f-4bd7-9b55-7553b6cb3ea0
Ahmadi, Arash
c88cc469-b208-4dad-9541-af5e555e0748
Mangieri, Eduardo
11b9b0b2-24c1-44c0-975c-7aa50937259e
Maharatna, Koushik
93bef0a2-e011-4622-8c56-5447da4cd5dd
Dasmahapatra, Srinandan
eb5fd76f-4335-4ae9-a88a-20b9e2b3f698
Zwolinski, Mark
adfcb8e7-877f-4bd7-9b55-7553b6cb3ea0

Ahmadi, Arash, Mangieri, Eduardo, Maharatna, Koushik, Dasmahapatra, Srinandan and Zwolinski, Mark (2011) On the VLSI implementation of adaptive-frequency hopf oscillator. IEEE Transactions on Circuits and Systems I: Regular Papers, 58 (7), 1076-1088.

Record type: Article

Abstract

In this paper, a new VLSI implementable Hopf oscillator with dynamic plasticity is proposed for next-generation portable signal processing application. A circuit-realizable piece-wise linear function has been used to govern the frequency adaptation characteristic of the proposed oscillator. Furthermore, a straightforward method is suggested to extract the frequency component of the input signal. Mathematical model of the oscillator is derived and it is shown, using VHDL-AMS model, that despite using a new nonlinear function, the oscillator exhibits the same characteristics and learning behavior as the original one with improved learning time. Subsequently, an equivalent circuit model and transistor level implementation for the oscillator is suggested and the mathematical model is confirmed with system and circuit level simulations. Capability of such oscillator to extract frequency futures without doing explicit signal processing is shown with examples of both synthetic and real-life EMG signals.

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More information

Published date: July 2011
Organisations: Electronic & Software Systems, EEE, Southampton Wireless Group

Identifiers

Local EPrints ID: 271761
URI: https://eprints.soton.ac.uk/id/eprint/271761
ISSN: 1549-8328
PURE UUID: f284931b-8db4-4667-98b5-d8ae5adf7386
ORCID for Mark Zwolinski: ORCID iD orcid.org/0000-0002-2230-625X

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Date deposited: 08 Dec 2010 14:02
Last modified: 06 Jun 2018 13:14

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Contributors

Author: Arash Ahmadi
Author: Eduardo Mangieri
Author: Mark Zwolinski ORCID iD

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