Theoretical Analysis and Practical Considerations for the Integrated Time-Stretching System Using Dispersive Delay Line (DDL)

Xiang, Bo; Kopa, Anthony; Fu, Zhongtao; Apsel, Alyssa

doi:10.1109/tmtt.2012.2215623

Cited by 31 publications

(25 citation statements)

References 12 publications

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“…Recently, due to the emerging research on analog signal processing (ASP) [7], such topology has also been used in dispersive delay lines (DDL) to synthesize the desired group delay response [8]. In addition, DTFs are reconfigurable due to the capability of controlling the gain of each unit-cell [9].…”

Section: Introductionmentioning

confidence: 99%

A Dual-Purpose Reconfigurable Negative Group Delay Circuit Based on Distributed Amplifiers

Gharavi

Daneshrad

et al. 2013

IEEE Microw. Wireless Compon. Lett.

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A dual-purpose reconfigurable negative group delay circuit based on distributed amplifiers Abstract-In this letter, a novel reconfigurable negative group delay distributed amplifier (NGD-DA) circuit is proposed. This NGD-DA offers a new method to realize negative group delay. By properly choosing the gain coefficient of each tap for the DA, we can synthesize the negative group delay at the reverse port of the DA in the frequency band of interest, while maintaining a flat gain at the forward port; this results in a dual-purpose DA. Moreover, the proposed NGD-DA is reconfigurable; the phase response at the reverse port can be simply controlled by adjusting the tap gain coefficients, and therefore the bandwidth as well as the amount of negative group delay can be manipulated. The proposed active NGD circuit is validated through theoretical explanation and experimental results.Index Terms-Dispersion engineering, distributed amplifier (DA), dynamic power supply, negative group delay (NGD), superluminal group velocity, transversal filter.

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Section: Introductionmentioning

confidence: 99%

A Dual-Purpose Reconfigurable Negative Group Delay Circuit Based on Distributed Amplifiers

Gharavi

Daneshrad

et al. 2013

IEEE Microw. Wireless Compon. Lett.

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“…18 More recently, some attempts have been made to implement wideband filters with linear group delay in modern semiconductor technologies. [19][20][21][22][23] Most of the works rely on the on-chip implementation of artificial TLs, that is, the approach considered in the present article. However, the design of such filters remains a core problem, since ASP applications require wideband filters presenting, simultaneously, a very linear group delay and a flat magnitude response.…”

Section: Introductionmentioning

confidence: 99%

Design of integrated all‐pass filters with linear group delay for analog signal processing applications

Ferreira

Avignon-Meseldzija

Ferreira

et al. 2020

Circuit Theory & Apps

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This article describes the design of integrated linear group delay filters for analog signal processing (ASP) applications and their implementation through constant-resistance lattice and bridged-T networks. Unlike previously published works, our design method uses a recursive procedure as the basis for the synthesis of a suitable transfer function. Thanks to this method, filters with a more linear group delay characteristic and flat magnitude response can be obtained.Two filters are designed in a 0.13-μm BiCMOS technology to demonstrate the method: a balanced lattice with a negative slope and an unbalanced bridged-T of positive slope. KEYWORDS all-pass filter, bridged-T network, lattice network, linear group delay, time-bandwidth product Int J Circ Theor Appl. 2020;48:658-673. wileyonlinelibrary.com/journal/cta

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“…R-ASP applications reported recently include a compressive receiver using CRLH dispersive delay line [3], a distortion-less realtime spectrum sniffer [4], an enhanced-SNR transceiver [5], a chipless RFID [6], time expansion systems [7], [8] for sampling enhancement, time compressor-reversor [9], and a dispersion code multiple access (DCMA) system [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable phaser using gain-loss C-sections for radio analog signal processing (R-ASP)

Zou

Gupta

Caloz

2015

2015 Asia-Pacific Microwave Conference (APMC)

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Some emerging applications of R-ASP require the radio systems to adapt to dynamic environments. This cannot be achieved using phasers with fixed group delay profiles. Therefore, we introduce here a gain-loss loaded C-section phaser featuring real-time tunability, or reconfigurability, in group delay. This phaser exhibits an all-pass response all the way across its tuning range thanks to a paired and equalized gain-loss C-section unit. A numerical example is provided, where reconfigurability is achieved by tuning the gain-loss pair of the different gain-loss C-section units of the phaser.

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Theoretical Analysis and Practical Considerations for the Integrated Time-Stretching System Using Dispersive Delay Line (DDL)

Cited by 31 publications

References 12 publications

A Dual-Purpose Reconfigurable Negative Group Delay Circuit Based on Distributed Amplifiers

A Dual-Purpose Reconfigurable Negative Group Delay Circuit Based on Distributed Amplifiers

Design of integrated all‐pass filters with linear group delay for analog signal processing applications

Reconfigurable phaser using gain-loss C-sections for radio analog signal processing (R-ASP)

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