Distributed integrated circuits: an alternative approach to high-frequency design

Hajimiri, Ali

doi:10.1109/35.983925

Cited by 30 publications

(11 citation statements)

References 8 publications

(11 reference statements)

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“…Considering the very high chip rates involved (40 GChip/s and beyond), it is key that the proposed structures operate across a wide range of frequencies from near DC to the cut-off frequency of the process. Such characteristics can be achieved with Distributed Topologies [4].…”

Section: Introductionmentioning

confidence: 99%

Electronic signal processing for Optical Code Division Multiple Access Networks

Pimenta¹,

Darwazeh²

2008

2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing

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This work demonstrates the potential of electronic signal processing for applications in Optical Code Division Multiple Access Networks. The proposed designs are based in distributed topologies allowing operation at speeds close to the cut-off frequency of the transistors employed. We discuss structures capable of encoding and decoding time-domain and multiwavelength Optical CDMA signals. A scheme for mitigating of the impact of Group Velocity Dispersion in multi-wavelength OCDMA systems is also analysed.

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Section: Introductionmentioning

confidence: 99%

Electronic signal processing for Optical Code Division Multiple Access Networks

Pimenta¹,

Darwazeh²

2008

2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing

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“…The cochlea performs highly resource-efficient distributed computation by exploiting the properties of a physical medium. Distributed analog computation has been used to build several efficient engineering systems, both at radio frequencies (RF) [13]- [16] and at lower frequencies [17].…”

Section: Introductionmentioning

confidence: 99%

A Bio-Inspired Active Radio-Frequency Silicon Cochlea

Mandal

Zhak

Sarpeshkar

2009

IEEE J. Solid-State Circuits

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Fast wideband spectrum analysis is expensive in power and hardware resources. We show that the spectrum-analysis architecture used by the biological cochlea is extremely efficient: analysis time, power and hardware usage all scale linearly with , the number of output frequency bins, versus log() for the Fast Fourier Transform. We also demonstrate two on-chip radio frequency (RF) spectrum analyzers inspired by the cochlea. They use exponentially-tapered transmission lines or filter cascades to model cochlear operation: Inductors map to fluid mass, capacitors to membrane stiffness and active elements (transistors) to active outer hair cell feedback mechanisms. Our RF cochlea chips, implemented in a 0.13 m CMOS process, are 3 mm 1.5 mm in size, have 50 exponentially-spaced output channels, have 70 dB of dynamic range, consume 300 mW of power and analyze the radio spectrum from 600 MHz to 8 GHz. Our work, which delivers insight into the efficiency of analog computation in the ear, may be useful in the front ends of ultra-wideband radio systems for fast, power-efficient spectral decomposition and analysis. Our novel rational cochlear transfer functions with zeros also enable improved audio silicon cochlea designs with sharper rolloff slopes and lower group delay than prior all-pole versions.

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“…In high-speed and microwave design, it seems almost inevitable that new design methodologies that take advantage of multiple signal paths, and distributed approaches will have to be applied more often [6]. One example of such multiple signal path approaches is phased array systems.…”

Section: Introductionmentioning

confidence: 99%