Patent application number | Description | Published |
20100105339 | SINGLE AMPLIFIER FILTER FOR CONSTANT GROUP DELAY IN RADIO FREQUENCY TRANSMITTERS - Apparatus and systems are provided for a single amplifier filter capable of a high quality factor. A filter comprises an amplifier having an amplifier input and an amplifier output, wherein the amplifier is configured to produce an output signal at the amplifier output based on a signal at the amplifier input. A first resistive element is coupled between an input node and the amplifier input, a second resistive element is coupled between a first node and the amplifier input, and a third resistive element is coupled between the amplifier output and the first node. A first capacitive element is coupled between the amplifier output and the amplifier input. The filter comprises a second node for an inverse of the output signal, wherein a second capacitive element is coupled between the first node and the second node. | 04-29-2010 |
20120082247 | System and Method for Phase Detection - A method may include performing a logical exclusive OR and a logical inverse exclusive or on an input reference signal and an output signal to generate an XOR signal and an XNOR signal, respectively. The method may also include generating a switch control signal indicative of whether a first phase of the input reference signal leads or lags a second phase of the output signal. The method may additionally include: (i) transmitting the XOR signal to an output of a switch if the first phase leads the second phase; and (ii) transmitting the XNOR signal to the output of the switch if the first phase lags the second phase. The method may further include generating a phase detector output signal indicative of a phase difference between the second phase based on a signal present on the output of the switch. | 04-05-2012 |
20130039368 | SYSTEM AND METHOD FOR FREQUENCY-AGILE TRANSMISSION IN A WIRELESS COMMUNICATION DEVICE - In accordance with some embodiments of the present disclosure, a method may include determining a range of frequencies allocated to resource blocks to be transmitted during a subsequent sub-frame slot or sounding reference symbol sub-slot. The method may also include determining an approximate center frequency of the range of frequencies. The method may additionally include modulating resource blocks of the sub-frame or sounding reference symbol sub-slot at the approximate center frequency. The method may further include transmitting the modulated resource blocks at the approximate center frequency. | 02-14-2013 |
20140369439 | SINGLE AMPLIFIER FILTER FOR CONSTANT GROUP DELAY IN RADIO FREQUENCY TRANSMITTERS - Apparatus and systems are provided for a single amplifier filter capable of a high quality factor. A filter comprises an amplifier having an amplifier input and an amplifier output, wherein the amplifier is configured to produce an output signal at the amplifier output based on a signal at the amplifier input. A first resistive element is coupled between an input node and the amplifier input, a second resistive element is coupled between a first node and the amplifier input, and a third resistive element is coupled between the amplifier output and the first node. A first capacitive element is coupled between the amplifier output and the amplifier input. The filter comprises a second node for an inverse of the output signal, wherein a second capacitive element is coupled between the first node and the second node. | 12-18-2014 |