CMOS low-power bandpass IF filter for Bluetooth

H. Alzaher; M. Al-Ghamdi; M. Ismail

CMOS low-power bandpass IF filter for Bluetooth

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CMOS low-power bandpass IF filter for Bluetooth

Author(s): H. Alzaher ; M. Al-Ghamdi ; M. Ismail
DOI: 10.1049/iet-cds:20050355

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Author(s): H. Alzaher ¹ ; M. Al-Ghamdi ¹ ; M. Ismail ²
- Affiliations: 1: Department of Electrical Engineering, KFUPM, Dhahran, Saudi Arabia
  2: Department of Electrical Engineering, The Ohio State University, Columbus, USA
Source: Volume 1, Issue 1, February 2007, p. 7 – 12
DOI: 10.1049/iet-cds:20050355 , Print ISSN 1751-858X, Online ISSN 1751-8598

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Design of a CMOS 18th-order IF (intermediate frequency) bandpass filter for integrated low-IF Bluetooth receivers is presented. The centre frequency and bandwidth of the filter are 3 and 1 MHz, respectively. The proposed filter is based on unity gain fully differential voltage buffers and provides efficient, low power and a small area design solution. The filter, including its automatic tuning circuit, occupies an area of 0.6 mm² in a standard 0.5 µm-CMOS chip. Experimental results show that the filter satisfies the selectivity and dynamic range requirements of Bluetooth while operating from a total supply current of 0.9 mA.

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