Patent ID: 8129813

Claim:
An optoelectronic sensor for demodulating a modulated photon flux ( 50 ) comprising: a semiconductor region ( 10 ); at least two collecting zones ( 20 , 22 ) present in the semiconductor region ( 10 ) and serving for collecting and tapping off minority carriers ( 11 ) generated when said modulated photon flux ( 50 ) penetrates into the semiconductor region ( 10 ), the collecting zones ( 20 , 22 ) being doped inversely with respect to the semiconductor region ( 10 ); characterized by at least two control zones ( 32 , 34 ) introduced in the semiconductor region ( 10 ) and serving for generating a drift field in a manner dependent on a control voltage that can be applied to the control zones ( 32 , 34 ), the control zones ( 32 , 34 ) being of the same doping type as the semiconductor region ( 10 ).