Circuit for reducing second and third order intermodulation distortion for a broadband rf amplifier

Control circuit for distortion selective modulation of a signal, comprising: a port (E) of input signals; a non-linear circuit coupled to said input port for selectively modulating a signal received at said input port; said non-linear circuit comprising: a pair of diodes (D1, D2) coupled together in series; first and second capacitors a (C1, C2) coupled together in series and coupled in parallel to said diode pair (D1, D2); a first resistor (R1) coupled at one end to a first end of said diode pair and at a second end to a fourth capacitor (C6), fourth capacitor (C6) being further coupled to said mass; and a second resistor (R2) coupled at one end to a second end of said diode pair (D1, D2), and by a second end to ground; and a port (A) output to output selectively modulated signal from said non-linear circuit; and characterized in that: one tercercondensador (C3) having a first end coupled between said first and second capacitors (C1, C2) and a second end coupled to ground.