Pulse-shaping networks with coupled magnetics
AssigneeMurata Manufacturing Co., Ltd.
InventorsJohn R. Hoversten, David J. Perreault, Yevgeniy A. Tkachenko
Life of this patent
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Abstract
A pulse-shaping network configured for use in a radio frequency (rf) power amplifier system, the pulse-shaping network comprising: a coupled magnetic element comprising a first inductive element magnetically coupled to a second inductive element, the first inductive element comprising a first winding disposed about a first portion of a core, and the second inductive element comprising a second winding disposed about a second portion of a core, wherein the first and second inductive elements are electrically coupled to provide three output terminals of the coupled magnetic element.
Claims22
A pulse-shaping network configured for use in a radio frequency (rf) power amplifier system, the pulse-shaping network comprising:
- a coupled magnetic element comprising a first inductive element magnetically coupled to a second inductive element;
- the first inductive element comprising a first winding disposed about a first portion of a core;
- and
- the second inductive element comprising a second winding disposed about a second portion of a core,
- wherein the first and second inductive elements are coupled to provide a T network having a first branch having an inductance corresponding to the inductance of the first inductive element and a mutual inductance of the first and second inductive elements, a second branch having an inductance corresponding to the inductance of the second inductive element and a mutual inductance of the first and second inductive elements, and a third branch having an inductance corresponding to the mutual inductance between the first and second inductive elements and polarities of the first and second windings.
A discrete supply modulation system for providing a varying supply bias voltage to a supply terminal of a radio frequency (RF) amplifier, the discrete supply modulation system comprising:
- a power management circuit (PMC) having an input and an output;
- an RF amplifier having an RF input, an RF output, and a supply terminal;
- a pulse shaping network (PSN) having an input coupled to the PMC and having an output coupled to the supply terminal of the RF amplifier, the PSN comprising a coupled magnetic element, the coupled magnetic element comprising:
- a first inductive element magnetically coupled to a second inductive element;
- the first inductive element comprising a first winding disposed about a first portion of a core;
- and
- the second inductive element comprising a second winding disposed about a second portion of a core,
- wherein the first and second inductive elements are coupled to provide a T network having a first output terminal having an inductance corresponding to the inductance of the first inductive element and a mutual inductance of the first and second inductive elements;
- a second output terminal having an inductance corresponding to the inductance of the second inductive element and a mutual inductance of the first and second inductive elements;
- a third output terminal having an inductance corresponding to the mutual inductance between the first and second inductive elements and polarities of the first and second windings;
- and
- wherein the PSN is configured to filter signals resultant from transitions between discrete voltage levels received from the PMC.
A radio frequency (RF) transmit system comprising:
- an RF amplifier having an RF input, an RF output, and a supply terminal configured to accept a supply bias voltage signal;
- and
- a discrete supply modulation system for providing a varying supply bias voltage to the supply terminal of the RF amplifier, the discrete supply modulation system comprising:
- a power management circuit (PMC) having an input and an output;
- a pulse shaping network (PSN) having an input coupled to the PMC and having an output coupled to the supply terminal of the RF amplifier, the PSN comprising a coupled magnetic element, the coupled magnetic element comprising:
- a first inductive element magnetically coupled to a second inductive element;
- the first inductive element comprising a first winding disposed about a first portion of a core;
- and
- the second inductive element comprising a second winding disposed about a second portion of a core,
- wherein the first and second inductive elements are coupled to provide a T network having a first output terminal having an inductance corresponding to the inductance of the first inductive element and a mutual inductance of the first and second inductive elements;
- a second output terminal having an inductance corresponding to the inductance of the second inductive element and a mutual inductance of the first and second inductive elements;
- and a third output terminal having an inductance corresponding to the mutual inductance between the first and second inductive elements and polarities of the first and second windings;
- and
- wherein the PSN is configured to filter signals resultant from transitions between discrete voltage levels received from the PMC.
Dependencies are inferred from the claim text.