Negative feedback current source circuit and electronic device

The invention relates to the technical field of electrons and discloses a negative feedback current source circuit and an electronic device. In the embodiment of the invention, a first-stage negativefeedback current source circuit produces first constant current going across a third resistor and provides reference voltage for a second-stage negative feedback current source circuit. The second-stage negative feedback current source circuit produces second constant current going across a second load according to the reference voltage provided by the first-stage negative feedback current sourcecircuit, the third resistor is connected with a pull-up voltage source, and the second load is grounded. According to the embodiment, a grounding function of the second load is achieved while output of second constant current is achieved by utilizing the first-stage negative feedback current source circuit, and accordingly the negative feedback current source circuit is applied to application scenarios needing load groundi