CMOS wideband analogue delay stage
Zhou, L.; Safarian, A.; Heydari, P.
Electronics Letters
Volume 42, Issue 21, 12 Oct. 2006 Page(s):1213 - 1214
Digital Object Identifier  
Summary:A new second-order all-pass filter with maximum achievable delay-bandwidth-product (DBW) is presented. The proposed circuit will be used as a wideband delay element in impulse radio ultra-wideband transceivers. Benefiting from a simple architecture, the proposed circuit achieves a 60 ps delay across a 10 GHz bandwidth, which is the largest delay ever reported over such a wide bandwidth. In addition, the most noticeable advantage of this delay circuit is the small variation of group delay across a wide frequency range, which means negligibly small phase distortion introduced by the circuit

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