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A new simple method for analysing of thermal noise in switched-capacitor filters

Rashtian, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1080/00207217.2012.680791
  3. Publisher: 2012
  4. Abstract:
  5. Thermal noise is one of the most important challenges in analogue integrated circuits design. This problem is more crucial in switched-capacitor (SC) filters due to the aliasing effect of wide-band thermal noise. In this article, a new simple method is proposed for estimating the power spectrum density of output thermal noise in SC filters, which have acceptable accuracy and short running time. In the proposed method, first using HSPICE simulator, accurate value of accumulated sampled noise on sampler capacitors in each clock state is achieved. Next, using difference equations of the SC filter, frequency response of the SC filter is shaped by time domain analysis. Based on the proposed method, a SC low-pass filter and a second-order SC band-pass filter are analysed. The results are validated by comparing to the previously measured data
  6. Keywords:
  7. Discrete noise analysis ; Switched-capacitor circuit ; Time domain noise analysis ; Aliasing effects ; Analogue integrated circuits ; Band pass ; Hspice simulator ; Noise analysis ; Power spectrum density ; Running time ; Sampled noise ; SC filters ; Second orders ; SIMPLE method ; Switched capacitor ; Switched capacitor circuits ; Switched capacitor filters ; Wide-band ; Bandpass filters ; Capacitors ; Difference equations ; Frequency response ; Linear integrated circuits ; Power spectral density ; Thermal noise ; Time domain analysis ; Switched filters
  8. Source: International Journal of Electronics ; Volume 99, Issue 12 , Feb , 2012 , Pages 1729-1737 ; 00207217 (ISSN)
  9. URL: http://www.tandfonline.com/doi/abs/10.1080/00207217.2012.680791