Patent application number | Description | Published |
20080258831 | AMPLIFYING APPARATUS - A pulse modulator generates a pulse-modulated signal by pulse-modulating and amplifying the amplitude component of an input signal. A low-pass filter filters the pulse-modulated signal from the pulse modulator, and generates an amplified amplitude signal which is obtained by amplifying the amplitude component. An error corrector generates a corrected amplitude signal by correcting an error of the amplified amplitude signal from the low-pass filter by using the amplitude component of the input signal. A mixing unit generates the output signal by mixing the corrected amplitude signal from the error corrector and the phase component of the input signal. | 10-23-2008 |
20090072901 | POWER AMPLIFIER - A power amplifier of the present invention includes a distributor ( | 03-19-2009 |
20090315620 | POWER AMPLIFIER - A power amplifier based on EER technology or ET technology extracts an amplitude-modulated component from a modulated signal as an input signal which includes the amplitude-modulated component and a phase-modulated component, and decomposes the amplitude-modulated component into two control signals whose product is proportional to the amplitude-modulated component. One of the control signals is amplified by a highly efficient amplifier, and thereafter is used to amplitude-modulate an output from an RF amplifier. The other control signal is converted by a pulse modulator into a rectangular-wave signal, which is then mixed with the phase-modulated component or the modulated signal and input to the RF amplifier. | 12-24-2009 |
20110090008 | POWER AMPLIFICATION APPARATUS AND POWER AMPLIFICATION METHOD - Disclosed is a power amplifier apparatus including: an amplifier amplifying an input modulated signal; a control signal generator receiving an amplitude component of the input modulated signal and generating a control signal; and a power combiner performing ON/OFF control of a switching element based on the control signal to control conduction and non-conduction of a current supplied from a second power supply. In the power combiner, a power of a pulsed form when the current from the second power supply is conductive is transferred in a direction of a first power supply, using a transformer. A difference power obtained by subtracting a constant value from a first power supply voltage when the amplitude of the input modulated signal is smaller than that of a reference signal is supplied from the power combiner to the amplifier, as a power supply thereof (FIG. | 04-21-2011 |
20110163822 | POWER AMPLIFIER - A power amplifier that amplifies an RF modulation signal containing an amplitude modulation component and a phase modulation component, including a polar modulator that outputs an amplitude component signal that is the amplitude modulation component of the RF modulation signal, a direct current power supply that outputs a direct current voltage, a pulse modulator that pulse-modulates the amplitude component signal, a pulse amplification circuit that amplifies a pulse modulation signal, a combining circuit that adds a direct current voltage that is outputted from the direct current power supply to an output signal of the pulse amplification circuit, a low pass filter that smoothens an output signal of the combining circuit, and an RF amplifier that not only amplifies the RF modulation signal, but also amplitude-modulates the amplified signal with an output signal of the low pass filter and outputs the resultant signal. | 07-07-2011 |
20110241775 | POWER AMPLIFYING DEVICES - A radio frequency amplifier amplifies a modulation signal or its phase modulation component and outputs the resultant signal. A linear amplifier adds an output voltage to a power supply voltage supplied to the radio frequency amplifier, amplifies a difference between the output voltage and the amplitude modulation component, and outputs the resultant difference. A control signal generation section detects a direction in which an output current of the linear amplifying section flows and generates a pulse modulation signal according to the direction of the current. A switching amplifying section controls connection and disconnection of a DC current based on the pulse modulation signal as a control signal so as to perform switching amplification for an output signal of the linear amplifying section, add the resultant signal to a predetermined DC voltage, and supply the resultant signal as the power supply voltage to the radio frequency amplifier. The DC current and the predetermined DC voltage are supplied to the switching amplifying section. | 10-06-2011 |
20110254622 | POWER AMPLIFYING DEVICES - A radio frequency amplifier amplifies a modulation signal or its phase modulation signal and outputs the resultant signal. A linear amplifying section adds an output voltage to a power supply voltage supplied to the radio frequency amplifier and negatively feeds back the power supply voltage supplied to the radio frequency amplifier such that the power supply voltage matches the amplitude modulation component of the modulation signal with a predetermined ratio. A control signal generation section detects a direction in which an output current of the linear amplifying section flows and generates a pulse modulation signal according to the direction of the current. A switching amplifying section controls connection and disconnection of a DC current based on the pulse modulation signal as a control signal so as to perform switching amplification for an output signal of the linear amplifying section and supply the resultant signal as the power supply voltage to the radio frequency amplifier. The DC current is supplied to the switching amplifying section. | 10-20-2011 |
20110279180 | POWER AMPLIFIER AND POWER AMPLIFYING METHOD - An aspect of a power amplifier according to the present invention is a power amplifier that amplifies a modulated signal including amplitude modulated components and phase modulated components, the power amplifier including a first voltage source | 11-17-2011 |
20120126893 | POWER AMPLIFIER, POWER AMPLIFICATION METHOD, AND STORAGE MEDIUM - This invention provides a power amplifier ( | 05-24-2012 |
20130016795 | TRANSMISSION DEVICEAANM Kunihiro; KazuakiAACI TokyoAACO JPAAGP Kunihiro; Kazuaki Tokyo JPAANM Hori; ShinichiAACI TokyoAACO JPAAGP Hori; Shinichi Tokyo JPAANM Shiikuma; KazumiAACI TokyoAACO JPAAGP Shiikuma; Kazumi Tokyo JP - A transmission device includes a pulse modulated signal generator that generates a pulse-modulated signal by changing the width of a pulse or the density of a pulse according to the magnitude of the amplitude component of an input signal while discretely changing the pulse height according to the magnitude of the amplitude, a modulated-signal generator that generates a modulated signal by integrating the pulse-modulated signal and the phase component of the input signal, a power amplifier that includes at least as many amplifiers as the number of the discrete amplitude levels of the modulated signal, changes the number of amplifies that amplify the modulated signal on the basis of the value of the amplitude level of the modulated signal, combines outputs of the amplifiers, and outputs a combined output, and an output filter that eliminates a square-wave component from the output of the power amplifier. | 01-17-2013 |
20130057340 | POWER SUPPLY DEVICE AND POWER AMPLIFICATION APPARATUS USING SAME - Provided are a highly efficient, low waveform distortion power supply device and a power amplifying apparatus with high efficiency and high linearity using the device as a power supply. | 03-07-2013 |
20130342185 | POWER SUPPLYING APPARATUS AND CONTROL METHOD THEREOF - In order to improve power efficiency, a power supplying apparatus includes a switching amplification unit supplying a first load with most of electric power, and a linear amplification unit correcting an output voltage applied to the first load according to an input signal. Furthermore, an electric current which flows into the linear amplification unit at the time of the correcting is supplied to a second load from a power supply terminal of the linear amplification unit. | 12-26-2013 |
20140218104 | POWER AMPLIFICATION DEVICE - An object of the present invention is to provide a power amplification device having high power efficiency for an input signal even in a power region in a large back-off. | 08-07-2014 |