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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8004356 | Tuning multiport amplifiers A method of tuning a multiport amplifier and a multiport amplifier are provided. The multiport amplifier comprises an even number of microwave power amplifiers arranged in parallel, a series of input ports and a series of output ports, the input ports being connecte... | 08/23/2011 |
| 7420412 | Multiple power mode amplifier with bias modulation option and without bypass switches A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power... | 09/02/2008 |
| 7394313 | Multiple power mode amplifier with bias modulation option and without bypass switches A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power... | 07/01/2008 |
| 7388427 | Multiple power mode amplifier with bias modulation option and without bypass switches A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power... | 06/17/2008 |
| 7385445 | High efficiency amplifier circuits having bypass paths Described herein are representative embodiments of amplifier bypass paths and amplifiers using such bypass paths. In certain exemplary embodiments, the amplifiers are operated as linear power amplifiers, such as may be used in wireless communications systems. Accord... | 06/10/2008 |
| 7382185 | Loop segment switching system The loop segment switching system includes a plurality of signal sources, each producing an output signal; and, a plurality of signal sinks, each signal sink normally accepting an output signal from an associated signal source and for increasing the power of the out... | 06/03/2008 |
| 7365602 | Multilevel power amplifier architecture using multi-tap transformer A multi-level power amplifier architecture using a multi-tap transformer implemented on a single CMOS integrated circuit wireless communications device is described. By providing a multi-tap transformer for coupling a plurality of power amplifiers to a shared output... | 04/29/2008 |
| 7352239 | Power amplification apparatus using switching structure in a wireless communication system and method for controlling the same A power amplification apparatus includes a carrier amplifier and a peaking amplifier. In the apparatus, a detection and comparison controller detects an envelope signal from an input signal, compares a value of the envelope signal with a threshold, and generates a c... | 04/01/2008 |
| 7348841 | Multiple power mode amplifier with bias modulation option and without bypass switches A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power... | 03/25/2008 |
| 7345537 | Linear power amplifier with multiple output power levels A power amplifier stage has a first amplifier subsection and a second amplifier subsection coupled in a parallel configuration. The first amplifier subsection receives a signal to be amplified and the second amplifier subsection receives the signal to be amplified v... | 03/18/2008 |
| 7316167 | Method and apparatus for protection of contour sensing devices A sheet film protective covering for different types of contour sensing devices is described. In a preferred embodiment, this covering is a mylar sheet film that is coated with a layer of a conductive material. The bottom surface of the mylar film is also preferably... | 01/08/2008 |
| 7315205 | Multiple power mode amplifier with bias modulation option and without bypass switches A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power... | 01/01/2008 |
| 7269036 | Method and apparatus for adjusting wakeup time in electrical power converter systems and transformer isolation An electrical power converter system adjusts a wakeup voltage periodically, to permit earlier connection and/or operation, to increase performance. The electrical power converter system selects between a mathematically adjusted wakeup voltage based on at least one p... | 09/11/2007 |
| 7221239 | Variable power divider A variable power divider and method can vary the RF power between ports in a high power and multi-carrier RF environment, such as is used in controlling signals sent and received in a base station antenna. The variable power divider can include a single-control phas... | 05/22/2007 |
| 7215192 | High efficiency power amplifier A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in RF applications such as mobile telephones. In the low power mode, the power consumption of the amplifier is reduced, which will increase operat... | 05/08/2007 |
| 7209003 | Asynchronous BTL design for a Class-D audio amplifier The present invention provides an asynchronous BTL (Bridge Tied Load) design for a Class-D audio amplifier. The Class-D audio amplifier comprises two independent signal routes, each of the two independent signal routes includes a PWM (Pulse Width Modulator), a predr... | 04/24/2007 |
| 7181163 | Multi-beam satellite communications payload with flexible power allocation A communications payload configuration comprising a multi-port amplifier that incorporates remotely controllable travelling wave tube amplifiers (TWTAs) for allowing their output power to be adjusted depending on the traffic demand and the payload operational condit... | 02/20/2007 |
| 7170346 | Arrangement for reducing non-linear distortions in an output signal of an amplifier stage A system reduces non-linear distortions in an output signal of an amplifier stage that is configured according to the feed forward principle. An amplifier stage input signal arrives at a main branch of an amplifier. The output signal of the amplifier, which is disto... | 01/30/2007 |
| 7161422 | Multiple power mode amplifier with bias modulation option and without bypass switches A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power... | 01/09/2007 |
| 7161425 | Radio frequency power amplifier for lossless power combining An amplifier device (40) includes at least one amplifier (42) having an output. A plurality of conductors (48, 50, 52) are coupled to the output in parallel with each other. The plurality of conductors (48, 50, 52) each has an electrical ... | 01/09/2007 |
| 7148746 | High efficiency amplifier An amplifier includes a main amplifier circuit with an input and output. At least one auxiliary amplifier circuit has an input and output, and is selectively operable to operate in combination with the main amplifier circuit. A signal combining network is coupled wi... | 12/12/2006 |
| 7142060 | Active splitter for multiple reception units An active splitter is disclosed for splitting an input signal into a plurality of split output signals. The active splitter may include a plurality of active circuits connected in parallel that produce the plurality of split output signals from the received input si... | 11/28/2006 |
| 7133921 | Portable devices for different control interfaces A communications interface system and method for a plasma generator is provided. The communications interface system includes a power delivery system component that has a standard POD interface for communicating information that complies with a first protocol. A por... | 11/07/2006 |
| 7126417 | Distributed gain network A system and method for a distribution network is provided wherein cascaded power amplifiers with bypass switching are disposed along the branches of the network. The amplifiers may have an RF modem and a programmable digital computer that enables communication with... | 10/24/2006 |
| 7092681 | High output power radio frequency integrated circuit A high output power radio frequency integrated circuit includes an up conversion module, a plurality of drivers and a plurality of integrated circuit pads. The up conversion module is operably coupled to convert a low intermediate frequency (IF) signal into a radio ... | 08/15/2006 |
| 7088176 | Method and arrangement relating to multicarrier power amplifiers The present invention relates to a Multi Carrier Power Amplifier, MPCA, comprising a number of parallel Multi Carrier Power Amplifiers, each comprising an amplification loop and an error cancellation loop, said amplification loop comprising at least a first gain and... | 08/08/2006 |
| 7076231 | Receiver apparatus controlling the power consumption according to the reception signal level A receiver apparatus is provided with a receiver section including an amplifying stage for amplifying a high frequency signal received by an antenna, a frequency converting stage for converting a frequency of the output signal of the amplifying stage, a local oscill... | 07/11/2006 |
| 7064606 | High efficiency amplifier and method of designing same An amplifier includes a main amplifier circuit and at least one auxiliary amplifier circuit. Portions of an RF signal to be amplified are delivered to the main and auxiliary amplifiers. The auxiliary amplifier circuit is selectively operable to operate in combinatio... | 06/20/2006 |
| 7061315 | Auxiliary amplifier network A high frequency amplifier network is provided in which an auxiliary amplifier is available to replace one of a plurality of primary amplifiers. Alternately, the auxiliary amplifier may operate in parallel with one of a plurality of primary amplifiers. ... | 06/13/2006 |
| 7057381 | Power supply controller and method In one embodiment, a power supply controller is configured to amplify a feedback signal and a voltage reference signal by gains that are substantially constant over an operating frequency of the power supply controller. ... | 06/06/2006 |
| 7053763 | System and method for alarm monitoring A system providing an alarm indication for a base transceiver station comprising: a voltage actuated device for sensing power to a tower mounted amplifier (TMA); and an alarm board for sensing an alarm initiated from the voltage actuated device. A method provided fo... | 05/30/2006 |
| 7049886 | High efficiency power amplifier with multiple power modes A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in RF applications such as mobile telephones. In the low power mode, the power consumption of the amplifier is reduced, which will increase operat... | 05/23/2006 |
| 7023270 | High efficiency power amplifier A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in RF applications such as mobile telephones. In the low power mode, the power consumption of the amplifier is reduced, which will increase operat... | 04/04/2006 |
| 6980780 | Power controller An apparatus for power controlling in a transmitter for detecting the output power without using a power coupler includes a plurality of stage amplifiers, a plurality of matching circuits, at least one power detector, and a bias control circuit. The stage amplifiers... | 12/27/2005 |
| 6972618 | High efficiency power amplifier with multiple power modes A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in RF applications such as mobile telephones. In the low power mode, the power consumption of the amplifier is reduced, which will increase operat... | 12/06/2005 |
| 6949974 | Radio frequency power amplifier The present invention provides a radio frequency power amplifier which may not introduce radio frequency loss during switching power amplifier units between high and low output power levels. By connecting a first-stage matching network M12 and first-stage matching n... | 09/27/2005 |
| 6943625 | Gain and phase balanced amplifier redundancy system An amplifier redundancy system includes an amplifier receiving signals from a first input switch when the switch is in a side port position. The system further includes a first output switch, in a side port position, receiving signals from the amplifier. A second am... | 09/13/2005 |
| 6943624 | Radio frequency power amplifier The present invention provides a radio frequency power amplifier which may not introduce radio frequency loss during switching power amplifier units between high and low output power levels. By connecting a first-stage matching network M12 and first-stage mat... | 09/13/2005 |
| 6917245 | Absolute power detector A method and apparatus is provided for detecting the output power of a power amplifier. The output power is detected by detecting the absolute values of the voltage and current at the output of the amplifier and mixing the detected voltage and current to generate a ... | 07/12/2005 |
| 6904013 | Error handling within power amplifier modules in wireless base-station CDMA base-station comprising a transmit stage (2, 4, 7, 9, 10, 11, 12) and a receive stage (3, 5, 8, 13) for communicating with mobile terminals has been provided. The transmit stage comprises a multi carrier power amplifier having at least two indepen... | 06/07/2005 |
