Title :
A time-interleaved continuous-time ΔΣ modulator with 20MHz signal bandwidth
Author :
Caldwell, Trevor C. ; Johns, David A.
Author_Institution :
Toronto Univ., Ont., Canada
Abstract :
This paper presents the first implementation results for a time-interleaved continuous-time ΔΣ modulator. The 3rd-order low-pass modulator operates at an oversampling ratio of 5 with a time-interleaving factor of 2 at sampling frequencies of 100MHz and 200MHz. It achieves an SNDR of 57dB and 49dB in signal bandwidths of 10MHz and 20MHz, respectively.
Keywords :
delta-sigma modulation; ΔΣ modulator; 10 MHz; 100 MHz; 20 MHz; 200 MHz; low pass modulator; time-interleaved continuous-time modulator; Bandwidth; Circuits; Costs; Data conversion; Delta modulation; Digital modulation; Filters; Frequency; Sampling methods; Transfer functions;
Conference_Titel :
Solid-State Circuits Conference, 2005. ESSCIRC 2005. Proceedings of the 31st European
Print_ISBN :
0-7803-9205-1
DOI :
10.1109/ESSCIR.2005.1541656
