Title :
Two-path double delay line based bandpass quadrature ΣΔ modulator
Author :
Nithin Kumar, Y.B. ; Bonizzoni, Edoardo ; Patra, Abani ; Maloberti, Franco
Author_Institution :
Dept. of Electr. & Electron., IIT Kharagpur, Kharagpur, India
Abstract :
A design technique for a double-delay based quadrature ΣΔ modulator is presented. The architecture uses a two-path scheme, which avoids mirror tones in the signal band and locks the intermediate frequency with the clock, thus avoiding the trimming requirement. The two-path architecture and time interleaving lead to an overall power reduction by a factor of 8.
Keywords :
modulators; quadrature amplitude modulation; sigma-delta modulation; design technique; double delay line based bandpass quadrature ΣΔ modulator; double-delay based quadrature ΣΔ modulator; intermediate frequency; mirror tones; power reduction; signal band; trimming requirement; two-path architecture;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2011.2532
