Field-Programmable Analog Arrays: A Floating—Gate Approach

Hall, Tyson S.; Hasler, P.; Anderson, David V.

doi:10.1007/3-540-46117-5_45

Cited by 27 publications

(19 citation statements)

References 61 publications

(150 reference statements)

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“…This FPAA contains two CABs with a floating-gate crossbar switch network connecting them [5]. The CAB design was slightly smaller than the one outlined in Section 2 having a C 4 bandpass filter module, 4 x 4 vector-matrix multiplier, and three widerange OTAs.…”

Section: System Resultsmentioning

confidence: 99%

“…Recent advances in analog floating-gate technologies have shown it to be a viable alternative to traditional FPAA designs [5]. As shown in Figure 1, analog floating-gate circuits have shown tremendous gains in efficiency (a factor of as much as 10,000) compared with custom digital approaches for the same applications, and when used in the ADC, they result in more efficient biasing.…”

Section: Low-power Signal Processingmentioning

confidence: 99%

See 1 more Smart Citation

Application performance of elements in a floating-gate FPAA

Hall

Twigg

Hasler

et al.

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512)

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Field-programmable analog arrays (FPAAs) provide a method for rapidly prototyping analog systems. Currently available commercial and academic FPAAs are typically based on operational amplifiers (or other similar analog primitives) with only a few computational elements per chip. While their specific architectures vary, their small sizes and often restrictive interconnect designs leave current FPAAs limited in functionality, flexibility, and usefulness. In this paper, we explore the use of floating-gate devices as the core programmable element in a signal processing FPAA. A generic FPAA architecture is presented that offers increased functionality and flexibility in realizing analog systems. In addition, the computational analog elements are shown to be widely and accurately programmable while remaining small in area.

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Section: System Resultsmentioning

confidence: 99%

Section: Low-power Signal Processingmentioning

confidence: 99%

Application performance of elements in a floating-gate FPAA

Hall

Twigg

Hasler

et al.

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512)

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show abstract

“…These single transistor learning synapses [8], [9], named because of the similarities to connectionist synapses, lead to a technology called analog computing arrays [10]. Using these floating-gate analog arrays, we are able to realize a wide range of programmable and adaptive [11] ASP systems.…”

Section: Programmable Analog Cmos Technologymentioning

confidence: 99%

Analog floating-gate, on-chip auditory sensing system interfaces

et al. 2005

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This paper describes our current efforts toward creating cooperative analog-digital signal-processing systems for auditory sensor and signal-processing applications. We address resolution issues that affect the choice of signal-processing algorithms arriving from an analog sensor. We discuss current analog circuit approaches toward the front-end signal processing by reviewing major programmable analog building blocks and showing how they can be interconnected to create a complete system. We also discuss our current IC approaches using this technology for noise suppression, as well as our current analog signal-processing front-end system for speech recognition. Experimental data is presented from circuits fabricated using a 0.5 m nwell CMOS process available through MOSIS.Index Terms-Analog cepstrum, analog hidden Markov model (HMM), analog signal processing (ASP), analog speech enhancement in noise, analog speech recognition, analog vector quantization (VQ), auditory signal processing, floating-gate circuits. N EW advances in analog very large-scale integration (VLSI) circuits have made it possible to perform operations that more closely reflect those done in digital signal-processing (DSP) applications or that are desired in future DSP applications. With these advances, analog circuits and systems can be programmable, reconfigurable, adaptive, and at a density comparable to digital memories (for example, 100 000+ multipliers on a single chip). Therefore, with both DSP and analog signal-processing (ASP) modalities feasible, more options are now available when designing a signal-processing system.In this paper, we will discuss ASP in the context of several audio-processing systems. The comparable digital algorithms are well understood and, since they are not novel, are not discussed here. The purpose, then, of this paper is to demonstrate the analog options available when deciding where to partition the analog and digital parts of a system. First, we will address resolution issues that affect the choice of signal-processing algorithms arriving from an analog sensor. Second, we will discuss the building blocks of current analog circuit approaches toward front-end signal processing and the relationship to modeling biological cochleas. Third, we will discuss our current IC

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“…The RASP is an FPAA designed by Tyson S. Hall in his Ph.D. thesis [13]. Since then, it has been developed by the CADSP group at Georgia Institute of Technology [14].…”

Section: ) Reconfigurable Analog Signal Processor (Rasp)mentioning

confidence: 99%

Analog Reconfigurable Circuits

Malcher¹,

Falkowski²

2014

International Journal of Electronics and Telecommunications

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Abstract-The aim of this paper is to present an overview of a new branch of analog electronics represented by analog reconfigurable circuits. The reconfiguration of analog circuits has been known and used since the beginnings of electronics, but the universal reconfigurable circuits called Field Programmable Analog Arrays (FPAA) have been developed over the last two decades. This paper presents the classification of analog circuit reconfiguration, examples of FPAA solutions obtained as academic projects and commercially available ones, as well as some application examples of the dynamic reconfiguration of FPAA.

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Field-Programmable Analog Arrays: A Floating—Gate Approach

Cited by 27 publications

References 61 publications

Application performance of elements in a floating-gate FPAA

Application performance of elements in a floating-gate FPAA

Analog floating-gate, on-chip auditory sensing system interfaces

Analog Reconfigurable Circuits

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