Low-Power Analog Channel Selection Filtering Techniques
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- 作者：Coro Garcia-Alberdi ; Antonio J. Lopez-Martin…
- 关键词：Analog CMOS integrated circuits ; Class AB circuits ; Transconductor ; Filter ; Automatic frequency tuning
- 刊名：Circuits, Systems, and Signal Processing
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：36
- 期：3
- 页码：895-915
- 全文大小：
- 刊物类别：Engineering
- 刊物主题：Circuits and Systems; Electrical Engineering; Signal,Image and Speech Processing; Electronics and Microelectronics, Instrumentation;
- 出版者：Springer US
- ISSN：1531-5878
- 卷排序：36
文摘
Various techniques to reduce power consumption in the channel selection filtering of wireless receivers are discussed. They include class AB operation by the use of quasi-floating gate transistors and reuse of circuital blocks. A mixed continuous/discrete frequency tuning approach set by a simple on-chip automatic tuning circuit is also presented, which allows wide tuning range with modest area and power requirements. The techniques presented are illustrated by a third-order CMOS Gm-C channel filter designed for a dual-mode Bluetooth/ZigBee zero-IF receiver, with two different on-chip automatic tuning circuits. Measurement results for a test chip prototype in a 0.5- \({\upmu }\)m CMOS process are presented, showing in-band filter IIP3 >20 dBVp with a power consumption of 3.65 mW for both Bluetooth and ZigBee modes, and the required frequency tuning range set by the automatic tuning circuits.