A power module includes: a first substrate having an outer surface and an inner surface; a semiconductor die coupled to the inner surface of the first substrate; a second substrate having an outer surface and an inner surface, the semiconductor die being coupled to the inner surface of the second substrate; and a flex circuit coupled to the semiconductor die.

A sensor device of the present invention includes first sensors receiving a plurality of driving signals; second sensors outputting a plurality of sensing signals in response to the driving signals; and a sensor receiver connected receiving the sensing signals from the second sensors, and including a band pass filter filtering the sensing signals. The band pass filter includes a multi-path filter in which a frequency of the driving signals is set as a center frequency; a gain amplifier amplifying signals filtered through the multi-path filter according to a predetermined gain value; and a buffer isolating the multi-path filter and the gain amplifier from each other.

An electronic device may include wireless circuitry with a processor, a transceiver, an antenna, and a front-end module coupled between the transceiver and the antenna. The front-end module may include one or more power amplifiers for amplifying a signal for transmission through the antenna. A power amplifier may include multiple amplifier stages. Current sharing or reuse may occur between two amplifier stages in the power amplifier via a current flow path between the two amplifier stages. A power supply voltage line may be connected to the current flow path and may provide the downstream amplifier stage with a supplemental supply current based on which the downstream amplifier stage can amplify a radio-frequency signal received from the upstream amplifier stage.

A low noise amplifier operating in an X-band and a Ku-band, the amplifier includes: a differential input unit that adjusts an impedance of an input low noise signal; a differential amplification unit comprising a positive wideband filter that feeds back an 8 to 16 GHz band signal from a positive low noise signal transmitted by the differential input unit, a negative wideband filter that feeds back an 8 to 16 GHz band signal from a negative low noise signal transmitted by the differential input unit, a positive amplification unit, and a negative amplification unit that amplifies a negative low noise signal transmitted by the differential input unit; and a differential output unit that outputs a positive low noise signal amplified by the positive amplification unit and a negative low noise signal amplified by the negative amplification unit.