A loopback circuit package comprises an inductor layer and a semiconductor substrate. The inductor layer includes a first inductor, a second inductor, a third inductor, and a fourth inductor, and. The semiconductor substrate includes a first capacitor electrically connected to the first inductor and the second inductor, and a second capacitor electrically connected to the third inductor and the fourth inductor. The first capacitor and the second capacitor are disposed in a first recess and a second recess of the semiconductor substrate, respectively.

A loopback circuit package comprises an inductor layer and a semiconductor substrate. The inductor layer includes a first inductor, a second inductor, a third inductor, and a fourth inductor, and. The semiconductor substrate includes a first capacitor electrically connected to the first inductor and the second inductor, and a second capacitor electrically connected to the third inductor and the fourth inductor. The first capacitor and the second capacitor are disposed in a first recess and a second recess of the semiconductor substrate, respectively.

Methods and devices for enhancing performance of a power splitter are presented. According to one aspect, the power splitter is realized via lumped elements that include inductively coupled coils. Values of the lumped elements are based on an equivalent circuit of the power splitter that includes a star topology provided by a mutual inductance connected to a first port of the power splitter and respective inductances of the inductively coupled coils modified by the mutual inductance connected between the mutual inductance and respective second and third ports of the power splitter. A coupling factor of the inductively coupled coils has a magnitude that is in a range from 0.15 to 0.45. The coupling factor is negative. Respective capacitors are connected to the ports of the power splitter. The respective capacitors include switchable capacitors.

Methods and devices for enhancing performance of a power splitter are presented. According to one aspect, the power splitter is realized via lumped elements that include inductively coupled coils. Values of the lumped elements are based on an equivalent circuit of the power splitter that includes a star topology provided by a mutual inductance connected to a first port of the power splitter and respective inductances of the inductively coupled coils modified by the mutual inductance connected between the mutual inductance and respective second and third ports of the power splitter. A coupling factor of the inductively coupled coils has a magnitude that is in a range from 0.15 to 0.45. The coupling factor is negative. Respective capacitors are connected to the ports of the power splitter. The respective capacitors include switchable capacitors.

An aerosol-generating system is provided, including: a cartridge including an aerosol-forming substrate; a resonant circuit, the cartridge including at least part of the resonant circuit, the circuit being configured to resonate at a predetermined resonant frequency associated with an identity of the cartridge; and an aerosol-generating device including: a housing to removably receive the cartridge, a power source to supply power to the cartridge, and control circuitry including a controller configured to determine a resonant frequency of the resonant circuit when the cartridge is received by the device, and identify the cartridge based on the determined frequency, the cartridge having a connection end to connect the cartridge to the device and including electrical contacts to electrically connect the cartridge to the device, and the device having a connection end to connect the device to the cartridge and including electrical contacts configured to electrically connect the device to the cartridge.

One example includes an acoustic resonator filter system. The system includes a plurality of filter blocks. Each of the filter blocks can include a plurality of tunable filter elements. Each of the tunable filter elements can include an acoustic resonator. The system also includes a switching network that receives a radio frequency (RF) input signal and provides a filtered RF output signal. The switching network can be configured to selectively switch at least one of the filter blocks in a signal path of the RF input signal to provide the RF output signal.

Circuits and methods for an amplifier (particularly LNAs) that achieve wideband output impedance matching and high gain while simultaneously rejecting out-of-band (OOB) harmonic frequencies. Some embodiments allow multiple modes of operation to allow selection of gain versus linearity characteristics. One aspect of the present invention is improvement of the linearity and sensitivity of a whole RF front end (RFFE) receiver chain by suppressing OOB gain within an LNA component at higher order harmonic frequencies. Another aspect of the present invention are new wideband and ultra-wideband LNA load circuits that, while achieving high frequency OOB rejection, maintain in-band high gain and wideband output impedance matching at the same time. Yet another aspect of the present invention are new ultra-wideband LNA output impedance matching circuits.

Circuits and methods for an amplifier (particularly LNAs) that achieve wideband output impedance matching and high gain while simultaneously rejecting out-of-band (OOB) harmonic frequencies. Some embodiments allow multiple modes of operation to allow selection of gain versus linearity characteristics. One aspect of the present invention is improvement of the linearity and sensitivity of a whole RF front end (RFFE) receiver chain by suppressing OOB gain within an LNA component at higher order harmonic frequencies. Another aspect of the present invention are new wideband and ultra-wideband LNA load circuits that, while achieving high frequency OOB rejection, maintain in-band high gain and wideband output impedance matching at the same time. Yet another aspect of the present invention are new ultra-wideband LNA output impedance matching circuits.

A signal transmission system includes: a first signal line and a second signal line each making up a differential line; a first capacitive load mechanism disposed in a first region connected to the first signal line, the first capacitive load mechanism having a first capacitance value; and a second capacitive load mechanism disposed in a second region connected to the second signal line and to the ground point line, the second capacitive load mechanism having a capacitance value asymmetric with the first capacitance value. This signal transmission system suppresses an increase in mode conversion loss caused by component characteristics variations.

An electronic component includes a first input/output port, a second input/output port, a third input/output port, a first circuit that is a characteristic impedance converter circuit provided between the first input/output port and the second input/output port, a second circuit that is a characteristic impedance converter circuit provided between the first input/output port and the third input/output port, and a third circuit provided between the second input/output port and the third input/output port, the third circuit having a circuit configuration where a complex conjugate relationship is made with each of the first and second circuits.