Inductive circuit arrangement

A radio frequency amplifier circuit comprising:

• a laterally diffused metal oxide semiconductor (LDMOS) substrate;
• a main amplifier circuit;
• a peak amplifier circuit;
• an input terminal that receives an input signal;
• a first inductive circuit including a pair of bond wires coupled to the input terminal and extending to a first output terminal to provide a first output signal to an input of the peak amplifier circuit;
• a second inductive circuit including a bond wire extending from an intermediate input terminal, to a second output terminal to provide a second output signal to an input of the main amplifier circuit;
• the respective terminals being located on the LDMOS substrate;
• the bond wires extending in a parallel direction and offset from one another to mitigate magnetic coupling between the bond wires;
• a capacitive circuit coupling the intermediate input terminal to the first output terminal;
• and
• a capacitive circuit coupling the input terminal to the second output terminal.

A method for splitting an input signal into two output signals, the method comprising:

• providing an input signal to an input terminal;
• passing the input signal to a first output terminal via a first inductive circuit including a pair of bond wires coupled to the input terminal and extending to the first output terminal, to provide a first output signal;
• coupling the signal at the first output terminal to an intermediate input terminal via a capacitive circuit;
• coupling the signal at the intermediate input terminal to a second output terminal, via a second inductive circuit including a bond wire extending from the intermediate input terminal to the second output terminal, to provide a second output signal, the bond wires extending in a parallel direction and offset from one another to mitigate magnetic coupling between the bond wires;
• and
• coupling the input signal at the input terminal to the second output terminal via a capacitive circuit.

An inductive circuit for splitting an input signal into two output signals, the circuit comprising:

• an input terminal that receives an input signal;
• a first inductive circuit including a pair of bond wires coupled to the input terminal and extending to a first output terminal to provide a first output signal;
• a second inductive circuit including a bond wire extending from an intermediate input terminal to a second output terminal to provide a second output signal, the bond wires extending in a parallel direction and offset from one another to mitigate magnetic coupling between the bond wires, wherein the bond wires in each of the first and second inductive circuits are respectively configured to facilitate a mutual magnetic coupling between the first and second inductive circuits in a selected frequency band;
• a capacitive circuit coupling the intermediate input terminal to the first output terminal;
• and
• a capacitive circuit coupling the input terminal to the second output terminal, wherein the inductive and capacitive circuits are configured to split the input signal into the first and second output signals by splitting the input signal into output signals that are offset from one another by a predetermined phase shift.