Title

Continuous-Time Time-Stretched Analog-To-Digital Converter Array Implemented Using Virtual Time Gating

Keywords

Analog-to-digital conversion (ADC); Channel mismatch; Microwave photonics; Optical signal processing; Time stretch

Abstract

We demonstrate the continuous-time operation of a time-stretch analog-to-digital converter array. A continuous-time RF signal is segmented into parallel channels and each channel is stretched in time prior to digitization. The technique offers improvement in the effective input bandwidth and sampling rate of the digitizer. The implementation uses virtual time gating for interleaving segments of the continuous-time RF signal. The signal is first modulated onto a linearly chirped optical carrier and then sliced, in time, using passive optical filters. This technique obviates the need for fast switching gates. It results in minimum interchannel mismatch and in hardware efficiency since all channels are stretched using the same electro-optic modulator and the same dispersive elements. © 2005 IEEE.

Publication Date

1-1-2005

Publication Title

IEEE Transactions on Circuits and Systems I: Regular Papers

Volume

52

Issue

8

Number of Pages

1502-1507

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TCSI.2005.851674

Socpus ID

26444527439 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/26444527439

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