Patent application number | Description | Published |
20130214844 | SWITCH CONTROL CIRCUIT, SEMICONDUCTOR DEVICE, AND RADIO COMMUNICATION DEVICE - A switch control circuit has a first terminal, a second terminal, a third terminal, a serial-parallel converter, a selector, a driver circuit and a tri-state buffer. The serial-parallel converter converts a serial switching control signal inputted from the third terminal into first parallel switching control signals when the first terminal is at a first power-supply potential. The selector selects either the first parallel switching control signals converted by the serial-parallel converter or second parallel switching control signals inputted into the second and third terminals, depending on the potential of the first terminal. The driver circuit converts potential levels of the first parallel switching control signals or the second parallel switching control signals selected by the selector and generates parallel switching control signals with potential levels capable of switching a switch circuit. | 08-22-2013 |
20130217347 | SWITCH CONTROL CIRCUIT, SEMICONDUCTOR DEVICE, AND RADIO COMMUNICATION DEVICE - A switch control circuit has level shifters connected to a switch circuit to convert voltage levels of control signals, a negative potential generating circuit connected to the level shifter, to generate a negative potential, a negative potential output line supplying the negative potential to the level shifter, and a negative potential output line control circuit configured to control the potential of the negative potential output line. The negative potential output line control circuit has a power-supply setting circuit, an inverter inverting the output signal from the power-supply setting circuit, a first capacitor connected between an output terminal of the inverter and the negative potential output line, and a negative potential initialization circuit. | 08-22-2013 |
20130222019 | SEMICONDUCTOR INTEGRATED CIRCUIT, SEMICONDUCTOR DEVICE, AND METHOD OF DESIGNING SEMICONDUCTOR INTEGRATED CIRCUIT - An semiconductor integrated circuit has a macro cell, an initial voltage setting unit to generate initial data to be set in the macro cell, and a data wiring section connected between the macro cell and the initial voltage setting unit so that the data wiring section is at a predetermined potential level. | 08-29-2013 |
20140077863 | SWITCH CONTROL CIRCUIT, SEMICONDUCTOR DEVICE, AND RADIO COMMUNICATION DEVICE - A switch control circuit has a first terminal, a second terminal, a third terminal, a serial-parallel converter, a selector, a driver circuit and a tri-state buffer. The serial-parallel converter converts a serial switching control signal inputted from the third terminal into first parallel switching control signals when the first terminal is at a first power-supply potential. The selector selects either the first parallel switching control signals converted by the serial-parallel converter or second parallel switching control signals inputted into the second and third terminals, depending on the potential of the first terminal. The driver circuit converts potential levels of the first parallel switching control signals or the second parallel switching control signals selected by the selector and generates parallel switching control signals with potential levels capable of switching a switch circuit. | 03-20-2014 |
20140113680 | SWITCH CONTROL CIRCUIT, SEMICONDUCTOR DEVICE, AND RADIO COMMUNICATION DEVICE - A switch control circuit has level shifters connected to a switch circuit to convert voltage levels of control signals, a negative potential generating circuit connected to the level shifter, to generate a negative potential, a negative potential output line supplying the negative potential to the level shifter, and a negative potential output line control circuit configured to control the potential of the negative potential output line. The negative potential output line control circuit has a power-supply setting circuit, an inverter inverting the output signal from the power-supply setting circuit, a first capacitor connected between an output terminal of the inverter and the negative potential output line, and a negative potential initialization circuit. | 04-24-2014 |
Patent application number | Description | Published |
20150256179 | SWITCHING CONTROL CIRCUIT AND WIRELESS COMMUNICATION DEVICE - A switching control circuit includes a level shifter that generates a switching control signal for a switching circuit, and a voltage generation circuit. The voltage generation circuit includes a first oscillator that generates a first oscillating signal, a frequency spectrum of which is controlled to be spread spectrum based on a second oscillating signal different from the first oscillating signal, and a power supply circuit that generates a power supply voltage based on the first oscillating signal and supplies a converted power supply voltage to the level shifter. | 09-10-2015 |
20150348993 | SEMICONDUCTOR SWITCH, WIRELESS APPARATUS, AND METHOD OF DESIGNING SEMICONDUCTOR SWITCH - A semiconductor switch on a SOI substrate that includes a supporting substrate, an insulating layer on the supporting substrate, and a semiconductor layer provided on the insulating layer, includes a first and a second through FET groups, each including a plurality of field effect transistors connected in series between a common node and a first and second node, respectively. The first through FET group has an area equal to or less than an area Sfet, which is calculated by using an equivalent circuit including a resistance that represents leakage of a high frequency signal from the first through FET group to the supporting substrate. | 12-03-2015 |
20150372591 | POSITIVE AND NEGATIVE POTENTIAL GENERATING CIRCUIT - A potential generating circuit of includes a charge pump having a first node at which a positive potential is output and a second node at which a negative potential is output. The potential generating circuit also includes a first filter between the first node and a first terminal that removes noise and outputs a filtered positive potential at the first terminal. A first clamp circuit adjusts the level of the filtered positive potential. A second filter is between the second node and a second terminal to remove noise from the negative potential and output a filtered negative potential at the second terminal. A second clamp circuit adjusts the level of the filtered negative potential. In the potential generating circuit there is no direct connection between the first end node and a ground line or between the ground line and the second end node. | 12-24-2015 |