Balanced tuned receiver front end with low noise and high common mode rejection ratio

31 January 1991

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 27 (3) , 234-235
https://doi.org/10.1049/el:19910151

Abstract

A balanced optical receiver front-end suitable for Gbit/s heterodyne detection in coherent optical communication systems is presented. The transimpedance is 70dBΩ with ±2dB ripple over the passband from 2 to 4.4 GHz. The ripple was reduced to ±0.5 dB within a passband from 2.1 to 4.4 GHz by manual tuning of the circuit. The equivalent input noise spectral density is below 4pA/√(Hz) and the common mode rejection ratio better than 26 dB. Standard commercial photodiodes and packaged components are used, and the circuit is implemented in conventional printed circuit board techniques.

Keywords

PACKAGED COMPONENTS
RIPPLE
CMRR
GBIT/S HETERODYNE DETECTION
CONVENTIONAL PRINTED CIRCUIT BOARD TECHNIQUES
PASSBAND
COHERENT OPTICAL COMMUNICATION SYSTEMS
TRANSIMPEDANCE
EQUIVALENT INPUT NOISE SPECTRAL DENSITY
MANUAL TUNING
2.4 GHZ
26 DB
BALANCED OPTICAL RECEIVER FRONT-END
BALANCED TUNED RECEIVER FRONT END
LOW NOISE RECEIVER
2 TO 4.4 GHZ
COMMERCIAL PHOTODIODES
HIGH COMMON MODE REJECTION RATIO

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