Interface circuit for digital transmitter

The invention discloses an interface circuit for a digital transmitter, and relates to the technical field of digital transmitters. The interface circuit for the digital transmitter comprises a four-wire six-wire conversion circuit, a first filter circuit, a second filter circuit, a third filter circuit, an analog-to-digital conversion integrated circuit and a decoupling circuit; the first filtercircuit, the second filter circuit and the third filter circuit respectively form a filter circuit together with an external power supply circuit, a reference voltage circuit and a signal circuit; theanalog-to-digital conversion integrated circuit performs analog-to-digital conversion on the acquired sensor signal and transmits the sensor signal to the microcontroller of the transmitter; and thedecoupling circuit decouples two groups of power supplies of the analog-to-digital conversion integrated circuit. The interface circuit has certain universality and can be used for adapting to varioustypes of sensors. 本发明公开了一种用