| 摘要 |
<p>The invention concerns a transducer for mixing a data signal at an intermediate frequency (IF) modulating an optical carrier with a microwave or millimetric wave from a local oscillator (LO). The microwave signal is then used as carrier for transmission to mobile terminals for example. Advantageously, said transducer performs a function for photodetection of the data signal, a function for mixing said data signal with the microwave signal and a function for suppressing in the output signal the LO frequency. Therefor, the transducer comprises two phototransistors in common transmitters, a current source connected to the two transmitters and a coupler for coupling the signals exiting from the collectors of the two phototransistors.</p> |
