Broad-Band Design Techniques for Transimpedance Amplifiers

In this paper, a novel bandwidth enhancement technique based on the combination of capacitive degeneration, broad-band matching network, and the regulated cascode (RGC) input stage is proposed and analyzed, which turns the transimpedance amplifier (TIA) design into a fifth-order low-pass filter with Butterworth response. This broad-band design methodology for TIAs is presented with an example implemented in CHRT 0.18-mum 1.8-V RF CMOS technology. Measurement data shows a -3-dB bandwidth of about 8 GHz with 0.25-pF photodiode capacitance. Comparing with the core RGC TIA without capacitive degeneration and broad-band matching network, this design achieves an overall bandwidth enhancement ratio of 3.6 with very small gain ripple. The transimpedance gain is 53 dBOmega with a group delay of 80plusmn20 ps. The chip consumes only 13.5-mW dc power and the measured average input-referred noise current spectral density is 18 pA/radicHz up to 10 GHz

[1]  Tamotsu Kimura,et al.  An auto-gain control transimpedance amplifier with low noise and wide input dynamic range for 10-Gb/s optical communication systems , 2001 .

[2]  Yi-Jen Chan,et al.  Bandwidth enhancement of transimpedance amplifier by a capacitive-peaking design , 1999, IEEE J. Solid State Circuits.

[3]  George Young,et al.  Initial implementations of point-to-point Ethernet over SONET/SDH transport , 2004, IEEE Communications Magazine.

[4]  F. Ellinger,et al.  A low-power 20-GHz 52-dB/spl Omega/ transimpedance amplifier in 80-nm CMOS , 2004, IEEE Journal of Solid-State Circuits.

[5]  A. Tzanakaki,et al.  Broadband building blocks [optical networks] , 2004, IEEE Circuits and Devices Magazine.

[6]  E. Sackinger,et al.  Broadband Circuits for Optical Fiber Communication , 2005 .

[7]  E. F. Tsakas,et al.  Input capacitance scaling related to short-channel noise phenomena in MOSFET's , 1999 .

[8]  Wai-Kai Chen.  The theory and design of broadband matching networks , 1976 .

[9]  Chi-Ying Tsui,et al.  IEEE Transactions on Circuits and Systems—I:Regular Papers information for authors , 2018, IEEE Transactions on Circuits and Systems I: Regular Papers.

[10]  Stephen P. Boyd,et al.  Bandwidth extension in CMOS with optimized on-chip inductors , 2000, IEEE Journal of Solid-State Circuits.

[11]  A. Hajimiri,et al.  Bandwidth enhancement for transimpedance amplifiers , 2004, IEEE Journal of Solid-State Circuits.

[12]  Sung Min Park,et al.  1.25-Gb/s regulated cascode CMOS transimpedance amplifier for Gigabit Ethernet applications , 2004, IEEE Journal of Solid-State Circuits.

[13]  J. A. Connelly,et al.  Low noise electronic system design , 1993 .

[14]  Eduard Säckinger.  Broadband Circuits for Optical Fiber Communication: Säckinger/Broadband , 2005 .

[15]  Y. Baeyens,et al.  Unified analytical expressions for transimpedance and equivalent input noise current of optical receivers , 2000 .

[16]  Richard Schatz,et al.  Design of inductive p-i-n diode matching for optical receivers with increased bit-rate operation , 2001 .

[17]  A. Ziel.  Noise in solid state devices and circuits , 1986 .

[18]  S. Chandrasekhar,et al.  A Si BiCMOS transimpedance amplifier for 10-Gb/s SONET receiver , 2001 .

[19]  Robert A. Minasian,et al.  Ultra-low-noise and wideband-tuned optical receiver synthesis and design , 1994 .

[20]  Sang-Gug Lee,et al.  An inductance enhancement technique and its application to a shunt-peaked 2.5 Gb/s transimpedance amplifier design , 2004, IEEE Transactions on Circuits and Systems II: Express Briefs.

[21]  E. J. Griffin.  Theory and Design of Broadband Matching Networks , 1976 .