A Modified CMOS Frequency Doubler Considering Delay Time Matching Condition

In this paper, a frequency doubler is designed that converts from 1.15 GHz input signal to 2.3 GHz output signal using TSMC 0.18 CMOS technology. The proposed doubler consist of a fully adjustable Schmitt trigger (FAST), time-delay components, XOR gate and a voltage controlled delay line (VCDL). Time-delay components use RC integrator and comparator. Advantages of this topology include good fundamental frequency and harmonic frequency suppression, compact layout and low power consumption. The desired signal at 2.3 GHz is 0.871 dBm. The fundamental frequency at 1.15 GHz and third harmonic frequency at 3.45 GHz approximately 37 dBc below the 2.3 GHz signal. The fourth harmonic frequency at 4.6 GHz is approximately 24 dBc below the 2.3 GHz signal. The power consumption is 11.07 mW and the phase noise of the output signal is 100.5 dBc/Hz at 10 KHz offset.

[1]  F. Ellinger,et al.  Ultracompact SOI CMOS frequency doubler for low power applications at 26.5-28.5 GHz , 2004, IEEE Microwave and Wireless Components Letters.

[2]  N. Ueda,et al.  Mixture density estimation via EM algorithm with deterministic annealing , 1994, Proceedings of IEEE Workshop on Neural Networks for Signal Processing.

[3]  R P Velthuizen,et al.  MRI segmentation: methods and applications. , 1995, Magnetic resonance imaging.

[4]  D. Huang,et al.  On CMOS exclusive OR design , 1989, Proceedings of the 32nd Midwest Symposium on Circuits and Systems,.

[5]  Jerry L. Prince,et al.  A Survey of Current Methods in Medical Image Segmentation , 1999 .

[6]  Michael E. Tobar,et al.  Ultra-low-noise microwave oscillator with advanced phase noise suppression system , 1996 .

[7]  B.R. Jackson,et al.  An L-band CMOS frequency doubler using a time-delay technique , 2006, Digest of Papers. 2006 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems.

[8]  S. Armato,et al.  Automated lung segmentation for thoracic CT impact on computer-aided diagnosis. , 2004, Academic radiology.

[9]  Joachim M. Buhmann,et al.  Unsupervised segmentation of textured images by pairwise data clustering , 1996, Proceedings of 3rd IEEE International Conference on Image Processing.

[10]  William E. Lorensen,et al.  Marching cubes: a high resolution 3D surface construction algorithm , 1996 .

[11]  Hyoungseop Kim,et al.  Automatic extraction of abnormal areas on CT images of the lung area , 2005 .

[12]  C.E. Saavedra,et al.  A clock frequency doubler using a passive integrator and emitter-coupled comparator circuit , 2004, Canadian Conference on Electrical and Computer Engineering 2004 (IEEE Cat. No.04CH37513).

[13]  Z. Wang,et al.  CMOS adjustable Schmitt triggers , 1991 .

[14]  Keng L. Wong,et al.  A PLL clock generator with 5 to 110 MHz lock range for microprocessors , 1992, 1992 IEEE International Solid-State Circuits Conference Digest of Technical Papers.