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A four-channel transimpedance amplifier for a compact disc front-end

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1 Author(s)
Baschirotto, A. ; Dept. of Innovation Eng., Lecce Univ., Italy

A four-channel transimpedance amplifier to be used in a compact disc front-end is presented. The overall transimpedance gain of the four channels is set by controlling the gain of a gain-controlled buffer. This solution requires for setting the gain of the four channels only one external precise resistor. The system has been realized in a 0.7 μm BiCMOS technology. It consumes 40 mW from a single 5 V supply and achieves 36 dB SNR for an input signal with a 0-3.2 MHz bandwidth, without requiring an equalizer in the signal path

Published in:

Consumer Electronics, IEEE Transactions on  (Volume:46 ,  Issue: 1 )