Title :
A novel ultra-high speed signal capture based on a single FPGA chip
Author :
Tsai, Guo-Ruey ; Lin, Min-Chum ; Hsieh, Jen-Wei ; Lin, Yun-Chung
Author_Institution :
Dept. of Electron. Eng., Kun-Shan Univ. of Technol., Yung-Kang, Taiwan
Abstract :
A novel ultra-high speed signal capturer based-on a single FPGA chip has been proposed. The slow delta-sigma D/A algorithm limits the conversion speed of all digital-type A/D converter. The proposed multi-pass method is used to enhance the apparent conversion rate despite of the relatively low real-time sampling rate of the original A/D converter. Except a simple RC average circuit for delta-sigma D/A conversion and a comparator with sampling/hold for A/D conversion, the whole system is built in a single FPGA chip, of which functions includes the DDS-type AWG, delta-sigma D/A converter, SAR A/D converter, TDC module, ADPLL module, DLL phase/time shifter, and data memory controller.
Keywords :
analogue-digital conversion; delta-sigma modulation; field programmable gate arrays; ADPLL module; DDS-type AWG; DLL phase/time shifter; FPGA chip; RC average circuit; SAR A/D converter; TDC module; data memory controller; delta-sigma D/A algorithm; delta-sigma D/A conversion; delta-sigma D/A converter; digital-type A/D converter; multipass method; ultra-high speed signal capture; Approximation algorithms; Circuit simulation; Control systems; Field programmable gate arrays; Frequency; Programmable logic arrays; Radio control; Sampling methods; Signal generators; Uniform resource locators;
Conference_Titel :
Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-8660-4
DOI :
10.1109/APCCAS.2004.1412743