| 摘要 |
<p>A multichannel analogue detection device for detecting a signal having an excellent signal-to-noise ratio. The device comprises a modulator (53) outputting a modulated signal S(P); a synchronous attenuation device (54) having variable phase Ζ and outputting an attenuated modulated signal; a multipoint receiver (52) for receiving an attenuated modulated signal and outputting a primary analogue signal for each point; un integrator outputting for each point a value V(P,Ζ) resulting from the integration over N periods of the primary analogue signal; a device for reading, digitizing and storing values V(P,Ζ) for a given value Ζ; a phase sequencer giving Ζ values of Ζ0+i2π/n for i integer varying between 1 and n; and a digital processing unit for obtaining data representing S(P) on the basis of values V(P, Ζ). Said device is particularly suitable for detecting a luminous flux with an array of photodiodes.</p> |
