Double-bus positive line reverse irrigation prevention circuit based on field effect transistors

The invention discloses a double-bus positive line reverse irrigation prevention circuit based on field effect transistors. In the circuit, a first field-effect transistor and a second field-effect transistor are respectively connected in series with a first positive bus and a second positive bus. A first bus comparison control module controls the first field effect transistor to be switched on through a first bus switch driving module when the first sampling voltage is larger than or equal to the output sampling voltage, and controls the first field effect transistor to be switched off through the first bus switch driving module when the first sampling voltage is smaller than the output sampling voltage; and a second bus comparison control module controls the second field effect transistor to be switched on through a second bus switch driving module when the second sampling voltage is larger than or equal to the output sampling voltage, and controls the second field effect transistor to be switched off throu