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Published September 2002 | public
Book Section - Chapter

Multi-Pole Bandwidth Enhancement Technique for Trans-impedance Amplifiers

Abstract

A new technique for bandwidth enhancement of amplifiers is developed. Adding several passive networks, which can be designed independently, enables the control of transfer function and frequency response behavior. Parasitic capacitances of cascaded gain stages are isolated from each other and absorbed into passive networks. A simplified design procedure, using well-known filter component values is introduced. To demonstrate the feasibility of the method, a CMOS trans-impedance amplifier is implemented in 0.18µm BiCMOS technology. It achieves 9.2GHz bandwidth in the presence of 0.5pF photo diode capacitance and a trans-resistance gain of 54dBΩ, while drawing 55mA from a 2.5V supply.

Additional Information

© 2002 IEEE. Issue Date: 24-26 Sept. 2002. Date of Current Version: 01 August 2005. The authors would like to thank Conexant Systems for fabricating the chip and M. Racanelli, S. Stetson, and A. Karroy for their support. They also acknowledge I. Aoki, H. Hashemi, D. Ham, S. Kee, and H. Wu from Caltech's CHIC group for useful discussions. We also thank Lee center for advanced networking for supporting this project.

Additional details

Created:
August 19, 2023
Modified:
October 24, 2023