The present invention provides a transmitter including a mixer, a harmonic impedance adjustment circuit and an amplifier. The mixer is configured to mix a first baseband signal with a first oscillation signal to generate a first mixed signal to a first node, and to mix a second baseband signal with a second oscillation signal to generate a second mixed signal to a second node. The harmonic impedance adjustment circuit is coupled between the first node and the second node, and is configured to reduce harmonic components of the first mixed signal and the second mixed signal to generate an adjusted first mixed signal and an adjusted second mixed signal. The amplifier is coupled to the harmonic impedance adjustment circuit, and is configured to generate an amplified signal according to the adjusted first mixed signal and the adjusted second mixed signal.

An amplifier includes a first coil coupled to at least one input node. The amplifier further includes second and third coils. A first terminal of the second coil is coupled to a source terminal of a first transistor, while a second terminal of the second coil is coupled to a source terminal of a second transistor. A third coil includes first and second terminals coupled to gate terminals of the first and second transistors, respectively. Responsive to receiving an input signal, the first coil electromagnetically conveys the signal to the second and third coils.

An amplifier includes a first coil coupled to at least one input node. The amplifier further includes second and third coils. A first terminal of the second coil is coupled to a source terminal of a first transistor, while a second terminal of the second coil is coupled to a source terminal of a second transistor. A third coil includes first and second terminals coupled to gate terminals of the first and second transistors, respectively. Responsive to receiving an input signal, the first coil electromagnetically conveys the signal to the second and third coils.

An apparatus is disclosed for processing a signal with a divided amplifier. In example implementations, an apparatus includes a first portion of an amplifier, a first port interface, a second port interface, and a switch matrix. The first port interface includes a first transformer; a second portion of the amplifier, which is coupled to the first transformer; and a first switch component that is coupled to at least one of the first transformer or the second portion of the amplifier. The second port interface includes a second transformer and a second switch component that is coupled to the second transformer. The switch matrix is coupled between the first switch component and the first portion of the amplifier and between the second switch component and the first portion of the amplifier. The switch matrix is also coupled between the second portion of the amplifier and the first portion of the amplifier.

A matching network is a matching network of a power amplifier circuit that outputs a signal obtained by a differential amplifier amplifying power of a high-frequency signal. The matching network includes an input-side winding connected between differential outputs of the differential amplifier; an output-side winding that is coupled to the input-side winding via an electromagnetic field and whose one end is connected to a reference potential; a first LC series resonant circuit including a capacitive element and an inductive element connected in series with each other, and being connected in parallel with the input-side winding; and a second LC series resonant circuit including a capacitive element and an inductive element connected in series with each other, and being connected in parallel with the output-side winding.

An improved transformer based switch for PALNA applications. The transformer based switch having an input single pole port and a circuit with at least one transformer and at least one switch configured to connect portions of the transformer to ground or to short the transformer. The primary side of the transformer being connected to the input port and the secondary side of the transformer being connected to an output port.

A power amplifier arrangement comprises a power amplifier comprising at least one transistor having a first gate and a second gate. The first gate is configured to receive a radio frequency input signal superimposed with a first control signal, and the second gate is configured to receive a second control signal. The first control signal is a linearization signal varying in relation to an envelope of the input signal and the second control signal is a temperature compensation signal varying in relation to a temperature of the power amplifier, or vice versa.

A matching network is a matching network of a power amplifier circuit that outputs a signal obtained by a differential amplifier amplifying power of a high-frequency signal. The matching network includes an input-side winding connected between differential outputs of the differential amplifier; an output-side winding that is coupled to the input-side winding via an electromagnetic field and whose one end is connected to a reference potential; a first LC series resonant circuit including a capacitive element and an inductive element connected in series with each other, and being connected in parallel with the input-side winding; and a second LC series resonant circuit including a capacitive element and an inductive element connected in series with each other, and being connected in parallel with the output-side winding.

Devices including a transistor having a parasitic capacitance between a control terminal and a load terminal of a first type are provided. Furthermore, the devices include advantageously arranged inductances which are electromagnetically coupled to one another and are configured at least partly to compensate for an effect of the parasitic capacitance in a range around a resonant frequency.

The present invention provides a transmitter including a mixer, a harmonic impedance adjustment circuit and an amplifier. The mixer is configured to mix a first baseband signal with a first oscillation signal to generate a first mixed signal to a first node, and to mix a second baseband signal with a second oscillation signal to generate a second mixed signal to a second node. The harmonic impedance adjustment circuit is coupled between the first node and the second node, and is configured to reduce harmonic components of the first mixed signal and the second mixed signal to generate an adjusted first mixed signal and an adjusted second mixed signal. The amplifier is coupled to the harmonic impedance adjustment circuit, and is configured to generate an amplified signal according to the adjusted first mixed signal and the adjusted second mixed signal.