Design of high-frequency Gm-C wavelet filters

A high–frequency wavelet filter which employs Gm–C blocks based on leap–frog (LF) multiple–loop feedback (MLF) structure is presented. The proposed method is well suitable for high–quality high–frequency operation since the Gm–C based filter can achieve high frequency, whilst LF MLF configuration has the characteristics of lower magnitude sensitivity and capability of realizing arbitrary rational functions. The Marr wavelet is selected as an example in this paper, and the design for a 100MHz frequency operation is elaborated. The wavelet filter is simulated using TSMC 1.8V 0.18μm CMOS technology. Simulation results indicate that the proposed method is feasible for high frequency operation with relatively low power consumption.

[1]  Wing-Hung Ki,et al.  Analog VLSI implementations of auditory wavelet transforms using switched-capacitor circuits , 1994 .

[2]  K. C. Ho,et al.  Modulation identification of digital signals by the wavelet transform , 2000 .

[3]  Sang-Ho Lee,et al.  A New CMOS Linear Transconductor , 1992 .

[4]  Yichuang Sun.  Design of high frequency integrated analogue filters , 2002 .

[5]  Wouter A. Serdijn,et al.  Analog wavelet transform employing dynamic translinear circuits for cardiac signal characterization , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[6]  S. Mallat.  A wavelet tour of signal processing , 1998 .

[7]  M. I. Sobhy,et al.  Real time radar target detection under jamming conditions using wavelet transform on FPGA device , 2000, 2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353).

[8]  E. Rodriguez-Villegas,et al.  An analogue bandpass filter realisation of the Continuous Wavelet Transform , 2007, 2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society.

[9]  Yichuang Sun.  Synthesis of Leap-Frog Multiple-Loop Feedback OTA-C Filters , 2006, IEEE Transactions on Circuits and Systems II: Express Briefs.

[10]  Wouter A. Serdijn,et al.  Log-domain wavelet bases , 2005, IEEE Trans. Circuits Syst. I Regul. Pap..

[11]  Ampol Tungkanawanich,et al.  Detection of wide-band E-M signals emitted from partial discharge occurring in GIS using wavelet transform , 2000 .

[12]  O. Moreira-Tamayo,et al.  Analog computation of wavelet transform coefficients in real-time , 1997 .

[13]  R. T. Edwards,et al.  A VLSI implementation of the continuous wavelet transform , 1996, 1996 IEEE International Symposium on Circuits and Systems. Circuits and Systems Connecting the World. ISCAS 96.