| Patent application number | Description | Published |
|---|
| 20080214134 | System And Method For Adjacent Channel Power Detection And Dynamic Bandwidth Filter Control - A system for detecting and minimizing interference in a radio receiver includes a plurality of bandpass filters having different response characteristics, a power detector configured to compare a power output of a first bandpass filter and a second bandpass filter, and logic to cascade a third bandpass filter when the difference in power output between the power output of the first bandpass filter and the power output of the second bandpass filter exceeds a threshold amount. | 09-04-2008 |
| 20090197554 | System And Method For Station Detection And Seek In A Radio Receiver - A system for detecting a broadcast channel in a radio receiver includes a receive signal strength indicator (RSSI) element configured to develop an RSSI signal that is representative of a power in a desired channel, a switchable bandwidth channel select filter having a power detector configured to compare a power output of the desired channel and at least one channel adjacent to the desired channel to develop a signal to adjacent channel power ratio (SACPR) signal that is representative of the noise in the desired channel, and a seek element configured to determine whether the RSSI signal is greater than a predetermined RSSI threshold and configured to determine whether the SACPR signal is greater than a predetermined SACPR threshold. | 08-06-2009 |
| 20100002345 | RADIO FREQUENCY SWITCH ELECTROSTATIC DISCHARGE PROTECTION CIRCUIT - An electrostatic discharge (ESD)-protected radio frequency (RF) transceiver switching circuit includes two or more switchable RF transmit and receive port circuits, a diode-based ESD-protection circuit, and a voltage-dividing circuit. The voltage-dividing circuit, which can be a switching circuit, minimizes the number of diode devices needed to protect against ESD by dividing the voltage at the antenna node down to a lower voltage across the diode devices. | 01-07-2010 |
| 20100197365 | ERROR VECTOR MAGNITUDE CONTROL WITHIN A LINEAR TRANSMITTER - In a portable radio transceiver, such as a mobile wireless telephone, conditions indicative of transmitter distortion (as represented by error vector magnitude (EVM)) are sensed, and transmitted RF power is adjusted in response, so as to reduce distortion and decrease EVM. The conditions can include high VSWR or a combination of high VSWR and low battery power. | 08-05-2010 |
| 20100264991 | SWITCHED CAPACITOR VOLTAGE CONVERTER FOR A POWER AMPLIFIER - A voltage converter includes a plurality of capacitors and corresponding first switch elements, the capacitors coupled in series and arranged to each charge to a voltage level during a first clock period, the voltage level determined by a supply voltage level, the number of capacitors and a value of each capacitor; and a plurality of second switch elements configured to cause the plurality of capacitors to be connected in parallel and to discharge into an output capacitor during a second clock period, the output capacitor charged to a discrete voltage output level so that the output capacitor provides the discrete voltage output level, wherein the discrete voltage output level is less than the supply voltage level and wherein the discrete voltage output level is used to develop a bias signal that is supplied to a power amplifier element. | 10-21-2010 |
| 20100317299 | SYSTEM AND METHOD FOR ADJACENT CHANNEL POWER DETECTION AND DYNAMIC BANDWIDTH FILTER CONTROL - A system for detecting and minimizing interference in a radio receiver includes a plurality of bandpass filters having different response characteristics, a power detector configured to compare a power output of a first bandpass filter and a second bandpass filter, and logic to cascade a third bandpass filter when the difference in power output between the power output of the first bandpass filter and the power output of the second bandpass filter exceeds a threshold amount. | 12-16-2010 |
| 20110006841 | SWITCHABLE BALANCED AMPLIFIER - A switchable balanced amplifier having multiple, configurable independent input/output paths. Switching networks coupled to the input and/or output quadrature couplers of the balanced amplifier are used to configurably direct any of one or more input signals to any of one or more output ports. In one example, each output port is coupled to circuitry tailored to a specific type of input signal, operating protocol and/or operating frequency band. | 01-13-2011 |
| 20110037501 | High agility frequency synthesizer phase-locked loop - A highly agile low phase noise frequency synthesizer is provided for rapid generation of frequency specific signals. The frequency synthesizer is capable of rapidly generating signals at different output frequencies while maintaining low cross-coupling. Two or more signal generators utilize a reference frequency to generate two or more signals. These signals are limit processed to reduce cross-coupling prior to being presented to a switch. Responsive to a control signal, the switch outputs one of the signals to a frequency modification device, such as a frequency divider or multiplier. Responsive to a control signal, the frequency modification device scales the frequency of the switch output to convert the frequency of the switch output signal to a desired output frequency. By maintaining sufficient frequency separation between the switch input signals cross-coupling and phase noise is minimized and implementation on an integrated circuit may be achieved. | 02-17-2011 |
