Power supply filter circuit for voltage-controlled oscillator and communication equipment

The utility model discloses a power supply filter circuit for a voltage-controlled oscillator and communication equipment, and the power supply filter circuit comprises a first power supply circuit which is used for outputting a first voltage signal; a first end of the amplifying circuit is connected with the first power supply circuit; the second power supply circuit is connected with the second end of the amplifying circuit, the second power supply circuit is used for compensating a second voltage signal for the amplifying circuit, the output end of the amplifying circuit is connected with the voltage-controlled oscillator, and the amplifying circuit is used for filtering the first voltage signal and the second voltage signal to obtain a power supply signal; and the power supply signal is output to the voltage-controlled oscillator. According to the technical scheme provided by the invention, the power supply voltage of the voltage-controlled oscillator can be improved on the premise that the cost input is