The design of a CMOS if bandpass amplifier with low sensitivity to process and temperature variations

Chung-Yu Wu, Chung Yun Chou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

A fully differential CMOS IF bandpass amplifier (BPA) operated at 10.7 MHz is designed in 0.25 μm 1P5M CMOS process technology. In this design, the core of the bandpass filter is realized by a simple fully differential inverter with feedback NMOS source follower as the transresistance (Rm) amplifier. The load of the amplifier is the PMOS current source in parallel with the cross-coupled PMOS devices which generate the negative resistance for filter Q enhancement. The capacitors in series with the inputs of Rm amplifier is used to realize the Rm-C filter function. The BPA can be used to select an IF channel of 500 KHz. The filter IIP3 is -3 dB, whereas the gain at the center frequency is 37.4 db. The power dissipation is 6 mW at 2.5 V power supply. From the simulation results using the four-corner device model parameters (FF, FS, SF, SS), it is seen that the gain variation and the center frequency variation are 4.2 db and 470 kHz, respectively. In the temperature range of 0/spl sim/80/spl deg/C, the gain and center frequency variations are 4.1 db and 200 kHz, respectively; When the resistors vary ±10%, the gain and center frequency variations are 5.6 db and 900 kHz, respectively.

Original languageEnglish
Title of host publicationISCAS 2001 - 2001 IEEE International Symposium on Circuits and Systems, Conference Proceedings
Pages121-124
Number of pages4
DOIs
StatePublished - 1 Dec 2001
Event2001 IEEE International Symposium on Circuits and Systems, ISCAS 2001 - Sydney, NSW, Australia
Duration: 6 May 20019 May 2001

Publication series

NameISCAS 2001 - 2001 IEEE International Symposium on Circuits and Systems, Conference Proceedings
Volume1

Conference

Conference2001 IEEE International Symposium on Circuits and Systems, ISCAS 2001
CountryAustralia
CitySydney, NSW
Period6/05/019/05/01

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    Wu, C-Y., & Chou, C. Y. (2001). The design of a CMOS if bandpass amplifier with low sensitivity to process and temperature variations. In ISCAS 2001 - 2001 IEEE International Symposium on Circuits and Systems, Conference Proceedings (pp. 121-124). [921803] (ISCAS 2001 - 2001 IEEE International Symposium on Circuits and Systems, Conference Proceedings; Vol. 1). https://doi.org/10.1109/ISCAS.2001.921803