Analysis and Experimental Characterization of Idle Tones in 2nd-Order Bandpass Sigma-Delta Modulators - A 0.8μm CMOS Switched-Current Case Study
Ths paper analyses the tonal behaviour of the quantization noise in 2nd-order bandpass SD modulators. The analysis previously performed for lowpass modulators is extended to the bandpass case. As a result, closed-form expressions for the frequency of the idle tones are derived for different location...
| Authors: | , , , , |
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| Format: | article |
| Publication Date: | 2001 |
| Country: | España |
| Institution: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repository: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/3782 |
| Online Access: | http://hdl.handle.net/10261/3782 |
| Access Level: | Open access |
| Keyword: | BandPass Sigma-Delta Idle Tones |
| Summary: | Ths paper analyses the tonal behaviour of the quantization noise in 2nd-order bandpass SD modulators. The analysis previously performed for lowpass modulators is extended to the bandpass case. As a result, closed-form expressions for the frequency of the idle tones are derived for different locations of the signal center frequency. The analytical results are validated through measurements from a silicon prototype realized using fully differential switched-current circuits in a standard 0.8μm CMOS technology. |
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