The balanced photoreceiver module BPRV2125A is a differential front-end for 43 Gbit/s DPSK-applications featuring high differential gain of typically 3000 V/W and is available as AC- or DC-coupled version. The photoreceiver contains two waveguide-integrated pin-photodiodes (PD) on a single chip and a limiting amplifier (LA) within one small form factor SMD-package. The limiting amplifier provides a differential output voltage swing of typ. 600 mV. The receiver is suited for DPSK and DQPSK applications at 40 G and 100 G with rates between 20 and 56 GBaud. The DC output voltage can be monitored for OUTN and OUTP independently. For each amplifier path a threshold control at a linear amplification stage should be applied to ensure an optimized differential output signal. An excellent electrical and optical phase propagation is achieved by a total skew of lower than 5 ps between the balanced signal paths.