| 摘要 |
<p>PURPOSE:To provide a title device which outputs only a photocurrent corresponding to incident light with frequency characteristics kept constant. CONSTITUTION:A structure comprises: a plurality of microimpurity layers 29 consisting of a predetermined impurity and buried in strip form by isolation in the surface zone on the light receiving side of a high resistance I layer; a plurality of bias resistances 36 connected to every microimpurity layer 29; impurity layers consisting of an impurity different from that of the microimpurity layer 29, buried in the other end of the high resistance I layer different from the microimpurity layer, and set at a predetermined bias potential; a plurality of coupling capacitances, respectively weighted to predetermined capacitances, which are provided to microimpurity layers respectively in pairs; a first output terminal 34 connected to a plurality of coupling capacitances and connected in common to an added coupling capacitance equal to the capacitance value of these coupling capacitances and one plurality of coupling capacitances; and a second output terminal 35 connected in canon to the other plurality of coupling capacitances.</p> |
