Magnetically coupled load modulation
First Claim
1. A method comprising:
- controlling a secondary amplifier output current of a secondary radio frequency (RF) amplifier gain element based on an input signal received from an amplifier input;
providing the secondary amplifier output current to a secondary amplifier output inductor to convert electrical energy to magnetic energy;
coupling the magnetic energy from the secondary amplifier output inductor to a primary amplifier output inductor, wherein the coupled magnetic energy is converted to induced electrical energy at the primary amplifier output inductor;
combining the induced electrical energy with output electrical energy from a primary RF amplifier gain element;
applying a combined electrical energy including the output electrical energy and the induced electrical energy to a primary amplifier load; and
wherein the combining the induced electrical energy with the output electrical energy from the primary RF amplifier gain element further comprises modulating a primary amplifier load impedance of the primary amplifier load as a function of the induced electrical energy.
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Accused Products
Abstract
A method, packaged semiconductor device, and system for controlling a secondary amplifier output current based on an input signal received from an amplifier input, converting electrical energy to magnetic energy at a secondary amplifier output inductor, coupling the magnetic energy from the secondary amplifier output inductor to a primary amplifier output inductor, converting the coupled magnetic energy to induced electrical energy at the primary amplifier output inductor, combining the induced electrical energy with output electrical energy from a primary amplifier gain element, and applying a combined electrical energy including the output electrical energy and the induced electrical energy to a primary amplifier load are provided.
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Citations
19 Claims
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1. A method comprising:
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controlling a secondary amplifier output current of a secondary radio frequency (RF) amplifier gain element based on an input signal received from an amplifier input; providing the secondary amplifier output current to a secondary amplifier output inductor to convert electrical energy to magnetic energy; coupling the magnetic energy from the secondary amplifier output inductor to a primary amplifier output inductor, wherein the coupled magnetic energy is converted to induced electrical energy at the primary amplifier output inductor; combining the induced electrical energy with output electrical energy from a primary RF amplifier gain element; applying a combined electrical energy including the output electrical energy and the induced electrical energy to a primary amplifier load; and wherein the combining the induced electrical energy with the output electrical energy from the primary RF amplifier gain element further comprises modulating a primary amplifier load impedance of the primary amplifier load as a function of the induced electrical energy. - View Dependent Claims (2, 4, 5, 6)
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3. A method comprising:
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controlling a secondary amplifier output current of a secondary radio frequency (RF) amplifier gain element based on an input signal received from an amplifier input; providing the secondary amplifier output current to a secondary amplifier output inductor to convert electrical energy to magnetic energy; coupling the magnetic energy from the secondary amplifier output inductor to a primary amplifier output inductor, wherein the coupled magnetic energy is converted to induced electrical energy at the primary amplifier output inductor; combining the induced electrical energy with output electrical energy from a primary RF amplifier gain element; applying a combined electrical energy including the output electrical energy and the induced electrical energy to a primary amplifier load; and wherein the converting the electrical energy to the magnetic energy at the secondary amplifier output inductor further comprises;
providing impedance inversion of a secondary amplifier load impedance of the secondary RF amplifier gain element.
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7. A packaged semiconductor device comprising:
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a primary radio frequency (RF) amplifier gain element; a primary amplifier output inductor electrically coupled to the primary RF amplifier gain element; a primary amplifier load electrically coupled to the primary amplifier output inductor; a secondary RF amplifier gain element; a secondary amplifier output inductor electrically coupled to the secondary RF amplifier gain element and magnetically coupled to the primary amplifier output inductor; and a secondary amplifier load electrically coupled to the secondary amplifier output inductor, wherein the secondary amplifier output inductor magnetically couples a majority of a secondary amplifier output power of the secondary RF amplifier gain element to the primary amplifier output inductor to be applied to the primary amplifier load. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A system comprising:
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a signal input; a phase adjustment circuit coupled to the signal input for receiving a radio frequency (RF) input signal; a primary RF amplifier gain element coupled to the phase adjustment circuit for receiving a first instance having a first phase of an RF signal; a secondary RF amplifier gain element coupled to the phase adjustment circuit for receiving a second instance having a second phase of the RF signal; a primary amplifier output inductor electrically coupled to a primary amplifier output of the primary RF amplifier gain element; a primary amplifier load electrically coupled to the primary amplifier output inductor; a secondary amplifier output inductor electrically coupled to a secondary amplifier output of the secondary RF amplifier gain element and magnetically coupled to the primary amplifier output inductor; and a secondary amplifier load electrically coupled to the secondary amplifier output inductor, wherein the secondary amplifier output inductor magnetically couples a majority of a secondary amplifier output power of the secondary RF amplifier gain element to the primary amplifier output inductor to be applied to the primary amplifier load. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification