ULTRAVIOLET LIGHT SENSING CIRCUIT AND SENSING SYSTEM

摘要

An ultraviolet light sensing circuit and sensing system. The ultraviolet light sensing circuit comprises a modulation unit and a phase delay unit, wherein the modulation unit comprises a first stage of inverter which is used for sensing ultraviolet light and is used as a voltage feedback modulation stage; and the phase delay unit comprises N stages of inverters which are connected in sequence, where N is an even number which is greater than or equal to 2. The modulation unit is connected to the phase delay unit in sequence, and the output voltage of the phase delay unit is fed to the modulation unit; and the modulation unit is modulated by a control signal which is a pulse signal. The ultraviolet light sensing circuit and sensing system can be used for ultraviolet light information communications. The ultraviolet light sensing circuit can sense ultraviolet light signals and output amplitude modulation wave signals.

主权项

1. An ultraviolet light sensing circuit, comprising a modulation unit and a phase delay unit, wherein:
the modulation unit comprises a first stage of inverter which is used for induction of ultraviolet light and as a voltage feedback modulation stage; the phase delay unit is sequentially composed of N stages of inverters, wherein N is even number which is greater than or equal to two; the modulation unit and the phase delay unit are sequentially connected, and the output voltage of the phase delay unit is feedback to the modulation unit; and the modulation unit is modulated by a control signal which is a pulse signal.