Radio frequency amplifier having improved CTB and cross modulation characteristics

A radio-frequency amplifier comprising:

• at least one distortion generation circuit including a first circuit having a nonlinear element and a first delay line coupled in series, and a second circuit having an attenuation element and a second delay line coupled in series, said first and second circuits being coupled in parallel;
• said at least one distortion generation circuit is coupled at an intermediate point between amplification devices of a radio-frequency amplification stage, and said first and second delay lines are configured to create a delay time change in a signal input level of a signal input to said radio-frequency amplification stage which opposes a delay time change in said signal input level caused by a delay time difference between said input and output of said radio-frequency amplification stage.

A distortion generation circuit, for use with a radio-frequency amplifier, comprising:

• a first circuit having a nonlinear element and a first delay line coupled in series;
• and
• a second circuit having an attenuation element and a second delay line coupled in series, said first and second circuits being coupled in parallel, wherein said first and second circuits have different delay times with respect to each other.

An integrated circuit comprising a radio-frequency amplifier circuit, said radio-frequency amplifier including:

• at least one distortion generation circuit including a first circuit having a nonlinear element and a first delay line coupled in series, and a second circuit having an attenuation element and a second delay line coupled in series, said first and second circuits being coupled in parallel;
• said at least one distortion generation circuit is coupled to at least one of an input and an output of a radio-frequency amplification stage of said radio-frequency amplifier, and said first and second delay lines are configured to create a delay time change in a signal input level of a signal input to said radio-frequency amplification stage which opposes a delay time change in said signal input level caused by a delay time difference between said input and output of said radio-frequency amplification stage.

An integrated circuit comprising a radio-frequency amplifier circuit, said radio-frequency amplifier including:

• at least one distortion generation circuit including a first circuit having a nonlinear element and a first delay line coupled in series, and a second circuit having an attenuation element and a second delay line coupled in series, said first and second circuits being coupled in parallel;
• said at least one distortion generation circuit is coupled at an intermediate point between amplification devices of a radio-frequency amplification stage, and said first and second delay lines are configured to create a delay time change in a signal input level of a signal input to said radio-frequency amplification stage which opposes a delay time change in said signal input level caused by a delay time difference between said input and output of said radio-frequency amplification stage.

An integrated circuit comprising a distortion generation circuit, said distortion circuit comprising:

• a first circuit having a nonlinear element and a first delay lined coupled in series;
• and
• a second circuit having an attenuation element and a second delay line coupled in series, said first and second circuits being coupled in parallel, wherein said first and second circuits have different delay times with respect to each other.