NDLI: f/sub T/-integration based continuous-time filters for very high frequencies

Content Provider	IEEE Xplore Digital Library
Author	Khumsat, P. Worapishet, A.
Copyright Year	2001
Description	Author affiliation: Dept. of Electr. & Electron. Eng., Prince of Songkla Univ., Thailand (Khumsat, P.)
Abstract	Fully functional integrator and bandpass filter based on the f/sub T/-integration technique are experimentally demonstrated for the first time using general purpose npn/pnp transistor arrays. The circuit configurations employed offer enhanced performance compared to the originally introduced f/sub T/-integrator structure with lower supply voltage, more accurate frequency control and less chip area while still maintaining a wide frequency tuning capability. The integrator prototype achieves -52 dB total harmonic distortion (THD) and -42 dB third-order intermodulation distortion with a unity-gain frequency tuneable from 20 MHz to 55 MHz. The bandpass filter also obtains a centre frequency tuning over one octave (from 23 MHz to 51 MHz) with -50 dB THD, 34 dB spurious free dynamic range and 1 dB-compression dynamic range of 40 dB at Q=12. Both circuits are able to operate successfully at frequencies beyond one-sixth of npn's f/sub T/ and more than six-times of pnp's f/sub T/.
Sponsorship	IEEE Circuits & Syst. Soc
Starting Page	248
Ending Page	251
File Size	388993
Page Count	4
File Format	PDF
ISBN	0780366859
DOI	10.1109/ISCAS.2001.921837
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-05-06
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Band pass filters Circuit optimization Dynamic range Differential equations Tunable circuits and devices Microelectronics Electronic mail Frequency control Prototypes Total harmonic distortion
Content Type	Text
Resource Type	Article

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