Title :
Frequency domain analysis of ΠΔΣ ADC and its application to combining subband decomposition and ΠΔΣ ADC
Author :
Kong, Shyang Kye ; Ku, Walter H.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
The ΠΔΣ ADC architecture, proposed recently by Galton and Jensen (1995), requires neither time oversampling nor time interleaving. This architecture has a bank of Hadamard modulators at the front-end that, along with low-pass channel filters and back-end Hadamard demodulators, decompose the input spectrum into non-overlapping frequency bands. The frequency domain analysis of ΠΔΣ ADC architecture shows that this architecture is closely related to the subband decomposition based ADC. Furthermore, the ΠΔΣ ADC architecture can be generalized by combining it with the subband decomposition based ADC architecture
Keywords :
Hadamard matrices; analogue-digital conversion; band-pass filters; frequency-domain analysis; matrix decomposition; signal reconstruction; ΠΔΣ ADC architecture; Hadamard modulators; back-end Hadamard demodulators; frequency domain analysis; input spectrum decomposition; low-pass channel filters; nonoverlapping frequency bands; signal reconstruction; subband decomposition; Band pass filters; Baseband; Channel bank filters; Delta modulation; Digital modulation; Frequency domain analysis; Interleaved codes; Low pass filters; Pulse modulation; Quantization;
Conference_Titel :
Circuits and Systems, 1996., IEEE 39th Midwest symposium on
Conference_Location :
Ames, IA
Print_ISBN :
0-7803-3636-4
DOI :
10.1109/MWSCAS.1996.594104
