| 摘要 |
The invention relates to a symmetrical optical receiver comprising a photodiode (Ph) and a symmetrical transimpedance amplifier (TIA). The cathode (K) or respectively the anode (A) of the photodiode (Ph) is connected via a first capacitor (C 1 ) or respectively second capacitor (C 2 ), to the first input or respectively second input, of the symmetrical transimpedance amplifier (TIA). By means of first means (1) or respectively second means (2), a current corresponding to the low-pass-filtered cathode voltage or respectively anode voltage, is conducted into the cathode (K) or respectively conducted away from the anode (A). With the symmetrical optical receiver according to the invention, a low level lower cut-off frequency is able to be achieved with comparatively small coupling capacitors (C 1 , C 2 ) and with a small circuitry outlay. Moreover, a relatively high voltage drop across the photodiode can be created even with small supply voltages.
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