The embodiment of the invention provides a filter circuit and communication equipment provided with the same. The filter circuit comprises a first transistor and a control circuit, wherein the first transistor works in a linear area; an emitter and a collector of the first transistor which work in the linear area and a load with a noise source are connected with a power supply and an internal resistor through circuits; when the load with the noise source works, an alternating current (AC) interference voltage is generated; the control circuit is used for acquiring a current signal passing through the power supply, adjusting the first transistor base current according to the current signal and controlling the stability of the first transistor collector current through the first transistor base current; and the control circuit is also used for acquiring voltage signals at the two ends of the power supply and the internal resistor, adjusting the first transistor base current according tothe voltage signals and controlling the stability of the first transistor collector current through the first transistor base current. The filter circuit has the advantages of adsorbing the AC interference voltage and ensuring that the power supply can normally supply power to the load with the noise source.