A 4.1-mW 10-MHz Fourth-Order Source-Follower-Based Continuous-Time Filter With 79-dB DR

In this paper, a "composite" source-follower is presented. Using a positive-feedback, the structure synthesizes complex poles with a single branch. This allows to realize a single-branch biquadratic cell. Moreover, due to the intrinsic feedback present in any source-follower, the proposed...

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Bibliographic Details
Published inIEEE journal of solid-state circuits Vol. 41; no. 12; pp. 2713 - 2719
Main Authors D'Amico, S., Conta, M., Baschirotto, A.
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, NY IEEE 01.12.2006
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Active filters
Amplitudes
Analog integrated circuits
Applied sciences
Baseband
Circuit properties
Circuits
CMOS
continuous-time filter
Design. Technologies. Operation analysis. Testing
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Energy consumption
Exact sciences and technology
Feedback
Frequency filters
Integrated circuits
Linearity
Noise levels
Poles
Prototypes
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Signal processing
Specifications
Transconductance
Voltage
Wireless communication
Wireless LAN
WLAN receiver
Wireless LAN
WLAN receiver
Prototype
Input signal
Feedback regulation
Base band
Receiver
Follower
continuous-time filter
Composite material
Monopole
Analog integrated circuits
Continuous time filters
Power consumption
Complementary MOS technology
Active filter
Analogue integrated circuits
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Summary:In this paper, a "composite" source-follower is presented. Using a positive-feedback, the structure synthesizes complex poles with a single branch. This allows to realize a single-branch biquadratic cell. Moreover, due to the intrinsic feedback present in any source-follower, the proposed cell performs larger linearity for smaller V ov (=V GS -V TH ). This is the opposite of other active filters and allows saving the power otherwise used to increase linearity. A fourth-order prototype satisfy typical WLAN 802.11.a/b/g baseband filter specifications has been realized in a 0.18 mum CMOS at 1.8-V supply. It achieves a 17.5-dBm IIP3 and a -40 dB HD3 for a 600-mV pp_diff input signal amplitude. A 24-muV rms noise gives a DR=79 dB, with 2.25-mA current consumption
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2006.884191