A New Low Voltage CMOS Transconductor for VHF Filtering Applications |
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Authors: | Luo Zhenying MF Li Yong Lian SC Rustagi |
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Affiliation: | (1) Signal Processing and VLSI Design Lab, Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 119260;(2) Institute of Microelectronics, Singapore, 117685 |
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Abstract: | In this paper, a new differential input CMOS transconductor circuit for VHF filtering application is introduced. The new circuit has a very high frequency bandwidth, large linear differential mode input range and good common mode signal rejection capability. Using 0.35 m CMOS technology with 3 V power supply, the transconductor has a ±0.9 V linear differential input range with a –54 dB total harmonic distortion (THD) and more than 1 GHz – 3 dB bandwidth. The large signal DC analysis and small signal ac analysis derived by compact equations are in line with SpectreS simulation. A 3rd order elliptic low pass g
m-C filter with a cutoff frequency of 150 MHz is demonstrated as an application of the new transconductor. |
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Keywords: | low voltage CMOS transconductor VHF filter |
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