Continuous-time time-stretched analog-to-digital converter array implemented using virtual time gating

    Authors

    Y. Han;B. Jalali

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    IEEE Trans. Circuits Syst. I-Regul. Pap.

    Keywords

    analog-to-digital conversion (ADC); channel mismatch; microwave; photonics; optical signal processing; time stretch; CONVERSION; Engineering, Electrical & Electronic

    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.

    Journal Title

    Ieee Transactions on Circuits and Systems I-Regular Papers

    Volume

    52

    Issue/Number

    8

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    1502

    Last Page

    1507

    WOS Identifier

    WOS:000231534800003

    ISSN

    1057-7122

    Share

    COinS