Patent ID: 7483499

Claim:
A receiver circuit comprising: at least one amplifier device for amplification of a data signal which is applied to an input terminal of the receiver circuit, and a control device for measuring a data rate of the data signal, and for setting a bandwidth of the amplifier device such that the bandwidth of the amplifier device corresponds to the data rate of the data signal, wherein the bandwidth is set as small as possible without the data signal being corrupted during amplification, wherein the control device comprises a data correlator having an input terminal such that the data correlator receives a received signal including one of the data signal and an amplified data signal, which has been amplified by the amplifier device, wherein the data correlator includes means for generating, in response to the received data signal, at least one phase-shifted auxiliary signal, wherein the data correlator also includes means for subjecting the received data signal and the at least one phase-shifted auxiliary signal to autocorrelation, and wherein the data correlator also includes means for producing at least one correlation signal, which corresponds to the autocorrelation, on an output terminal of the data correlator, wherein the data correlator comprises: a phase shifter coupled to receive the received data signal for forming a phase-shifted auxiliary signal, and a D flipflop having a data input terminal connected to receive the received data signal, a clock terminal connected to receive the phase-shifted auxiliary signal, and an output terminal for transmitting a correlation signal.