Details

Autor(en) / Beteiligte

• Rashtian, Mohammad
• Hemmatyar, Ali Mohammad Afshin
• Hashemipour, Omid

Titel

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

Ist Teil von

• International journal of electronics, 2012-12, Vol.99 (12), p.1729-1737

Ort / Verlag

Abingdon: Taylor & Francis Group

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Taylor & Francis Journals Auto-Holdings Collection

Beschreibungen/Notizen

• 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.