Systems and methods for suppressing and mitigating harmonic distortion in a circuit
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsFeng-Wei KUO, Kai XU, Robert Bogdan STASZEWSKI
Life of this patent
Estimating the term…
Abstract
Systems and methods for suppressing and mitigating harmonic distortion in a circuit are disclosed. In one example, a disclosed circuit includes a radio frequency (RF) oscillator and a power amplifier. The RF oscillator is configured to generate an RF signal. The power amplifier is configured to generate an amplified RF signal based on the RF signal. The power amplifier includes a transformer including a primary winding and a secondary winding, and a feedback capacitor electrically coupled to the primary winding and the secondary winding.
Claims20
A method for suppressing harmonic distortions of a circuit comprising a radio frequency (RF) oscillator configured to generate an RF signal, a power amplifier configured to generate an amplified RF signal based on the RF signal, a transformer and a feedback capacitor, comprising:
- generating a first signal having a harmonic distortion with respect to a given order harmonic at a primary winding of the transformer;
- sending the first signal through the feedback capacitor to generate a second signal at a secondary winding of the transformer;
- sending the second signal as a feedback to the primary winding;
- and
- compensating the first signal with the second signal to suppress the harmonic distortion.
A method for suppressing harmonic distortions of a circuit comprising a radio frequency (RF) oscillator configured to generate an RF signal, a power amplifier configured to generate an amplified RF signal based on the RF signal, a transformer and a feedback capacitor, comprising:
- generating a first signal having a harmonic distortion with respect to a given order harmonic at a primary winding of the transformer;
- sending the first signal through the feedback capacitor to generate a second signal at a secondary winding of the transformer, wherein a given order harmonic of the second signal is an inversion of the given order harmonic of the first signal;
- sending the second signal as a feedback to the primary winding through a magnetic coupling;
- and
- compensating the first signal with the second signal,
- wherein the given order harmonic of the second signal is an inversion of the given order harmonic of the first signal.
A method for suppressing harmonic distortions of a circuit comprising a radio frequency (RF) oscillator configured to generate an RF signal, a power amplifier configured to generate an amplified RF signal based on the RF signal, a transformer and a feedback capacitor, comprising:
- generating a first signal having a harmonic distortion at a primary winding of the transformer;
- sending the first signal through the feedback capacitor to generate a second signal at a secondary winding of the transformer;
- sending the second signal as a feedback to the primary winding through a magnetic coupling between the primary winding and the secondary winding;
- sensing the magnetic coupling between the primary winding and the secondary winding by a coil magnetically coupled between the primary winding and the secondary winding;
- and
- compensating the first signal with the second signal to suppress the harmonic distortions by controlling a bias voltage to mitigate a magnetic coupling with respect to at least one harmonic injection from the power amplifier to the RF oscillator.
Dependencies are inferred from the claim text.