Title :
A High-speed Fast-acquisition CMOS Phase/Frequency Detector for MB-OFDM UWB
Author :
Chen, Roger Yubtzuan ; Chen, Wen-Yan
Author_Institution :
Dept. of Electron. Eng., Nat. Yunlin Sci. & Technol. Univ.
fDate :
2/1/2007 12:00:00 AM
Abstract :
A high-speed CMOS phase/frequency detector (PFD) for faster frequency acquisition is presented. An improved CMOS D-type master-slave flip-flop is described and adopted. Higher speed is attributed to the reduced node capacitances. Charge-sharing phenomena are circumvented. An input delay scheme is employed to achieve faster acquisition. The optimal delay for PFD maximum operating frequency is analytically studied and a design guide is given.
Keywords :
CMOS digital integrated circuits; OFDM modulation; flip-flops; phase detectors; ultra wideband communication; CMOS D-type master-slave flip-flop; MB-OFDM UWB; charge-sharing phenomena; frequency acquisition; high-speed fast-acquisition CMOS phase-frequency detector; input delay scheme; multi-band orthogonal frequency division multiplexing ultrawideband system; Amplitude modulation; Capacitance; Circuits; Delay; Flip-flops; Frequency synthesizers; Master-slave; Phase detection; Phase frequency detector; Phase locked loops;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2007.339496
