Patent application number | Description | Published |
20080261543 | TRANSMISSION CIRCUIT AND COMMUNICATION DEVICE - Provided is a transmission circuit capable of operating with high linearity and with low noise. An AM variable fc filter | 10-23-2008 |
20090289723 | PLL OSCILLATION CIRCUIT, POLAR TRANSMITTING CIRCUIT, AND COMMUNICATION DEVICE - Provided is a PLL oscillation circuit that can reduce the variability of modulation sensitivity of a VCO | 11-26-2009 |
20100073095 | Frequency Synthesizer and Radio Transmitting Apparatus - A frequency synthesizer ( | 03-25-2010 |
20100272222 | PLL MODULATION CIRCUIT, RADIO TRANSMISSION DEVICE, AND RADIO COMMUNICATION DEVICE - Provided are a PLL modulation circuit, a radio transmission device, and a radio communication device capable of maintaining a modulation accuracy for modulation of a wide band. The PLL modulation circuit ( | 10-28-2010 |
20130148769 | WIRELESS APPARATUS - A wireless apparatus includes a clock generation PLL circuit of a digital baseband section. A variable output regulator receives as an input a VCO control voltage for controlling an oscillation frequency of a VCO in the PLL circuit, varies an output voltage in accordance with the VCO control voltage, and supplies, as a supply voltage, the output voltage to a power terminal of a high frequency circuit, such as an amplifier. The VCO control voltage changes in accordance with temperature or process variations, and the supply voltage of the high frequency circuit is controlled in accordance with the VCO control voltage. For this reason, performance deterioration ascribable to the temperature or process variations can be compensated for. | 06-13-2013 |
20140183722 | SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING SAME - This semiconductor device, which has electronic components provided in a cavity of a module having a cavity structure, can be prevented from being increased in size. In the device, the module having the cavity structure is provided with a plurality of components, for instance, an IC ( | 07-03-2014 |
20150156054 | TRANSMISSION APPARATUS - A square detection circuit square-detects a portion of a high frequency transmission signal that is extracted by a directional coupler, of a high frequency transmission signal amplified by a power amplifier. A first adjustment circuit extracts a DC component from a detection output of the square detection circuit, and adjusts respective amplitudes of baseband I and Q signals generated by an I/Q signal generation circuit, in response to the extracted DC component. A second adjustment circuit extracts an AC component from the detection output of the square detection circuit, and adjusts the respective amplitudes and phases, and the respective DC offsets of the baseband I and Q signals generated by the I/Q signal generation circuit, in response to the extracted AC component. | 06-04-2015 |
20150236847 | SIGNAL-GENERATING CIRCUIT AND WIRELESS COMMUNICATION DEVICE - A signal-generating circuit includes a voltage-controlled oscillator that generates an oscillated signal; a first frequency divider that generates a first divided signal by dividing the oscillated signal; a second frequency divider that generates a second divided signal by dividing the divided signal; a phase comparator that receives as input the second divided signal and a reference signal and outputs two signals corresponding to a phase difference therebetween; a loop filter that extracts a low frequency signal between the two signals to be output to the voltage-controlled oscillator; a third frequency divider that generates a third divided signal by dividing the first divided signal; a first frequency converter that generates a first frequency converted signal by multiplying the oscillated signal by the third divided signal; and a first multiplier that generates a multiplied signal by multiplying the first frequency converted signal by a first multiplication number. | 08-20-2015 |