Abstract: Provided is a prismatic secondary battery, in one example the prismatic secondary battery including: a case including an opening; an electrode assembly stored inside the case; and a cap plate coupled to the opening in the case, and having electrode terminals of a positive electrode and a negative electrode, wherein: a swelling tape is attached to a surface of the electrode assembly, wherein the swelling tape elongates or expands in contact with an electrolyte in the case, and a concave first beading part is formed on at least two surfaces facing each other along a front, rear, left and right perimeter of the case.

Abstract: A front end radio frequency (RF) module including one or more first filter circuits configured to implement a front end function by filtering first signals communicated between one or more first antenna and a transceiver and one or more second filter circuits configured to implement at least a portion of an additional network function within the front end RF module by filtering second signals communicated between one or more second antennas and the transceiver.

Abstract: A front end radio frequency (RF) module including one or more first filter circuits configured to implement a front end function by filtering first signals communicated between one or more first antenna and a transceiver and one or more second filter circuits configured to implement at least a portion of an additional network function within the front end RF module by filtering second signals communicated between one or more second antennas and the transceiver.

Abstract: A front end radio frequency (RF) module including one or more first filter circuits configured to implement a front end function by filtering first signals communicated between one or more first antenna and a transceiver and one or more second filter circuits configured to implement at least a portion of an additional network function within the front end RF module by filtering second signals communicated between one or more second antennas and the transceiver.

Abstract: A front end radio frequency (RF) module including one or more first filter circuits configured to implement a front end function by filtering first signals communicated between one or more first antenna and a transceiver and one or more second filter circuits configured to implement at least a portion of an additional network function within the front end RF module by filtering second signals communicated between one or more second antennas and the transceiver.

Abstract: A power amplifier comprising a power stage comprises a voltage detection circuit configured to detect an output voltage of the power stage, a current detection circuit configured to detect an output current of the power stage, a control voltage generation circuit configured to generate a control voltage substantially proportional to the detected output voltage and the detected output current, and a control circuit configured to decrease an output power of the power stage when the control voltage exceeds a predetermined value.

Abstract: A radio frequency (RF) power amplifier comprises an output stage amplifying circuit and a counterpart waveform generator. The output stage amplifying circuit receives a first waveform through an input node and amplifies the first waveform so as to output an amplified waveform through an output node. The counterpart waveform generator generates a second waveform corresponding to a portion of frequency components of the first waveform. The output stage amplifying circuit and the counterpart waveform generator are electrically coupled such that the second waveform is applied to the input node of the output stage amplifying circuit to substantially compensate the portion of frequency components of the first waveform.

Abstract: A power amplifier comprising a power stage comprises a voltage detection circuit configured to detect an output voltage of the power stage, a current detection circuit configured to detect an output current of the power stage, a control voltage generation circuit configured to generate a control voltage substantially proportional to the detected output voltage and the detected output current, and a control circuit configured to decrease an output power of the power stage when the control voltage exceeds a predetermined value.

Abstract: A radio frequency (RF) power amplifier comprises an output stage amplifying circuit and a counterpart waveform generator. The output stage amplifying circuit receives a first waveform through an input node and amplifies the first waveform so as to output an amplified waveform through an output node. The counterpart waveform generator generates a second waveform corresponding to a portion of frequency components of the first waveform. The output stage amplifying circuit and the counterpart waveform generator are electrically coupled such that the second waveform is applied to the input node of the output stage amplifying circuit to substantially compensate the portion of frequency components of the first waveform.

Abstract: A radio frequency device includes a radio frequency (RF) power amplifier (PA) circuit including a driver stage configured to amplify an input signal to generate an output signal and a power stage configured to amplify the output signal, a first bias circuit configured to supply a first bias current to the driver stage, a second bias circuit configured to supply a second bias current to the power stage, and a protection circuit configured to limit a current flowing in the RF PA. The protection circuit is coupled between the first bias circuit and the second bias circuit.

Abstract: A heterojunction bipolar transistor (HBT) hybrid type RF (radio frequency) power amplifier includes a first device including an input terminal for receiving an RF signal, a pre-driver stage for amplifying the received RF signal, and an output terminal, the input terminal, the pre-driver stage and the output terminal being disposed in or over a first substrate; and a second device having a main stage having an HBT amplifier circuit disposed in or over a second substrate to further amplify the RF signal amplified by the pre-driver stage. The RF signal further amplified by the main stage is output through the output terminal of the first device.

Abstract: A heterojunction bipolar transistor (HBT) hybrid type RF (radio frequency) power amplifier includes a first device including an input terminal for receiving an RF signal, a pre-driver stage for amplifying the received RF signal, and an output terminal, the input terminal, the pre-driver stage and the output terminal being disposed in or over a first substrate; and a second device having a main stage having an HBT amplifier circuit disposed in or over a second substrate to further amplify the RF signal amplified by the pre-driver stage. The RF signal further amplified by the main stage is output through the output terminal of the first device.

Abstract: A heterojunction bipolar transistor (HBT) hybrid type RF (radio frequency) power amplifier includes a first device including an input terminal for receiving an RF signal, a pre-driver stage for amplifying the received RF signal, and an output terminal, the input terminal, the pre-driver stage and the output terminal being disposed in or over a first substrate; and a second device having a main stage having an HBT amplifier circuit disposed in or over a second substrate to further amplify the RF signal amplified by the pre-driver stage. The RF signal further amplified by the main stage is output through the output terminal of the first device.

Abstract: A heterojunction bipolar transistor (HBT) hybrid type RF (radio frequency) power amplifier includes a first device including an input terminal for receiving an RF signal, a pre-driver stage for amplifying the received RF signal, and an output terminal, the input terminal, the pre-driver stage and the output terminal being disposed in or over a first substrate; and a second device having a main stage having an HBT amplifier circuit disposed in or over a second substrate to further amplify the RF signal amplified by the pre-driver stage. The RF signal further amplified by the main stage is output through the output terminal of the first device.

Abstract: An amplification device includes a series combination of a driver stage, an output terminal matching network, and a secondary amplification stage. The driver stage includes a driver amplifier and an output matching network. The secondary amplification stage includes a parallel combination of an impedance transformation network and a main amplification stage. The main amplification stage includes a plurality of main amplification branches in parallel with each other, and an input matching network in series with the parallel combination. Each main amplification branch includes a main amplifier, and input and output impedance matching networks. A control circuit supplies activation signals to the main amplification branches to selectively turn them on and off. The device has no switches in the path of the signal that is amplified. In at least one operating mode, the control circuit turns on at least two of the main amplification branches at the same time.

Abstract: An amplification device includes a series combination of a driver stage, an output terminal matching network, and a secondary amplification stage. The driver stage includes a driver amplifier and an output matching network. The secondary amplification stage includes a parallel combination of an impedance transformation network and a main amplification stage. The main amplification stage includes a plurality of main amplification branches in parallel with each other, and an input matching network in series with the parallel combination. Each main amplification branch includes a main amplifier, and input and output impedance matching networks. A control circuit supplies activation signals to the main amplification branches to selectively turn them on and off. The device has no switches in the path of the signal that is amplified. In at least one operating mode, the control circuit turns on at least two of the main amplification branches at the same time.

Abstract: Provided is a series type Doherty amplifier which includes a first power amplifier and a second power amplifier using a plurality of transformers. The first power amplifier and the second power amplifier are connected in series. The second power amplifier and a first transformer are connected in series. A first path is branched from a junction between the first power amplifier and the second power amplifier and a phase delay device and a second transformer are connected in series. An output port of the second transformer is connected to a junction of a second path of an output port of the second power amplifier. An efficiency of each power amplifier is determined by a ratio of 1:M in size of a final stage of each of the first and second power amplifiers.

Abstract: Provided is a series type Doherty amplifier which includes a first power amplifier and a second power amplifier using a plurality of transformers. The first power amplifier and the second power amplifier are connected in series. The second power amplifier and a first transformer are connected in series. A first path is branched from a junction between the first power amplifier and the second power amplifier and a phase delay device and a second transformer are connected in series. An output port of the second transformer is connected to a junction of a second path of an output port of the second power amplifier. An efficiency of each power amplifier is determined by a ratio of 1:M in size of a final stage of each of the first and second power amplifiers.