| 摘要 |
Optical receivers with a photodiode (PD) and a transimpedance amplifier are optimized for signals with a particular transmission rate. A circuit is provided whereby the optical receiver can be adapted to different transmission rates. To attain this object, the feedback resistor of the transimpedance amplifier is divided into at least two resistors (RF1, RF2) connected in series. According to the transmission rate, the respective optimum resistance value is switched into the negative-feedback path with the aid of a control circuit. This makes it possible to operate such a universal optical receiver in a broadband subscriber interface both at a transmission rate of 150 Mb/s and at a transmission rate of 600 Mb/s, for example.
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