A 2MHz CMOS Gm-C complex filter with on-chip automatic tuning for wireless sensor networks application

A g m -C complex filter with on-chip automatic tuning for wireless sensor networks (WSN) is designed using 0.18¿m RF CMOS process. This filter is synthesized from a low-pass 5 th -order Chebyshev RLC ladder filter prototype by means of capacitors and fully balanced transconductors with extended line...

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Bibliographic Details
Main Authors: Chuanchuan Wan, Zhiqun Li
Format: Conference Proceeding
Language:English
Subjects:
automatic tuning
Band pass filters
Bandwidth
Circuit optimization
CMOS process
complex filter
gm-C
linearized transconductor
Network synthesis
Network-on-a-chip
Nonlinear filters
Phase locked loops
Radio frequency
Wireless sensor networks
wireless sensor networks (WSN)
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Description
Summary:A g m -C complex filter with on-chip automatic tuning for wireless sensor networks (WSN) is designed using 0.18¿m RF CMOS process. This filter is synthesized from a low-pass 5 th -order Chebyshev RLC ladder filter prototype by means of capacitors and fully balanced transconductors with extended linear range. A conventional phase-locked loop (PLL) is used to realize the on-chip automatic tuning for both center frequency and bandwidth control. The filter bandwidth is 2.4 MHz and is centered at 2 MHz. The image band rejection is higher than 63 dB while the ripple in the passband is less than 0.5 dB. The complete filter including on-chip tuning circuit consumes less than 5 mA with 1.8V single supply voltage.
ISSN:2163-0771
DOI:10.1109/APCC.2009.5375657