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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | El-Sankary, K. Assi, A. Sawan, M. |
| Copyright Year | 2003 |
| Description | Author affiliation: Dept. of Electr. Eng., Ecole Polytech. de Montreal, Que., Canada (El-Sankary, K.; Assi, A.; Sawan, M.) |
| Abstract | Modern communication systems need high-speed ADCs with wide spurious-free dynamic range (SFDR). Conventional time-interleaved ADCs suffer from spurious components that seriously affect the SFDR. Improvement in the SFDR has been achieved by randomizing the samples of the analog input between the different ADC channels at the expense of adding more ADCs and more analog circuitry to the architecture, which increases the complexity of the system as a whole. In this paper, we present the mathematical background describing the effect of randomizing the samples among the interleaved ADCs and we propose a digitally oriented method, based on this analysis, to randomize the mismatches among the ADC channels. Analysis and behavioral simulations show the effectiveness of the proposed approach in multi-channel ADCs with arbitrary bit resolution and sampling rate. For a 10 bit 500 MS/sec ADC, the SFDR achieved using the proposed randomizing method can be as wide as -79 dBc, which is an enhancement of more than 30 dB compared to the conventional time interleaved ADC. |
| Sponsorship | IEEE Circuits & Syst. Soc Mahanakorn Univ. Technol |
| File Size | 283877 |
| File Format | |
| ISBN | 0780377613 |
| DOI | 10.1109/ISCAS.2003.1205693 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2003-05-25 |
| Publisher Place | Thailand |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Sampling methods Dynamic range Analytical models Delay Analog circuits Modems Wireless communication Topology Timing Complexity theory |
| Content Type | Text |
| Resource Type | Article |
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