초록 ▼

A photosensitive detector (1) for detecting luminous flashes (2) is provided with a photosensitive diode (3) which is linked to a positive voltage and to ground via a resistor R1 and which is capable of transforming the luminous flashes into electrical signals and a circuit (4) that processes the el

A photosensitive detector (1) for detecting luminous flashes (2) is provided with a photosensitive diode (3) which is linked to a positive voltage and to ground via a resistor R1 and which is capable of transforming the luminous flashes into electrical signals and a circuit (4) that processes the electrical signals generated by the photosensitive diode (3). The circuit (4) causes electrical signals which correspond to luminous flashes (2) received by the photosensitive diode (3) and which exhibit a fast rise time to be strengthened, and the circuit (4) causes electrical signals which correspond to luminous flashes (2) received by the photosensitive diode (3) and which vary more slowly in intensity to be attenuated. The circuit (4) is linked directly to the photosensitive diode (3) and includes a differentiator circuit. The differentiator circuit has a differential amplifier (5) with a non-inverting input linked to a connection point situated between the photosensitive diode and the resistor R1, an inverting input linked to ground via a capacitor and to the connection point via a resistor Rx, and an output, and the differential amplifier (5) also has a resistor R2 linked to a connection point between the capacitor and the inverting input.

대표청구항 ▼

[ We claim:] [1.] A photosensitive detector (1) for detecting luminous flashes (2), comprising:a photosensitive diode (3) which is linked to a positive voltage and to ground via a resistor R1 and which is capable of transforming said luminous flashes into electrical signals;a circuit (4) that proces

[ We claim:] [1.] A photosensitive detector (1) for detecting luminous flashes (2), comprising:a photosensitive diode (3) which is linked to a positive voltage and to ground via a resistor R1 and which is capable of transforming said luminous flashes into electrical signals;a circuit (4) that processes said electrical signals generated by said photosensitive diode (3), said circuit (4) causing electrical signals which correspond to luminous flashes (2) detected by said photosensitive diode (3) and which exhibit a fast rise time to be strengthened, and said circuit (4) causing electrical signals which correspond to luminous flashes (2) detected by said photosensitive diode (3) and which vary more slowly in intensity to be attenuated, said circuit (4) being linked directly to said photosensitive diode (3) and including a differentiator circuit, said differentiator circuit comprising:a differential amplifier (5) having a non-inverting input linked to a connection point situated between said photosensitive diode (3) and said resistor R1, having an inverting input linked to ground via a capacitor and to said connection point via a resistor Rx, and having an output; anda resistor R2 linked to a connection point between said capacitor and said inverting input and to said output of said differential amplifier (5).