Low-Power Analog Channel Selection Filtering Techniques

详细信息    查看全文

• 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.