| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
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| 05/25/2004 | CA2245525C Fat sound creation means |
| 05/25/2004 | CA2204212C Load actuation circuit with a surge protecting function |
| 05/21/2004 | WO2004042917A2 Sense amplifier thermal correction scheme |
| 05/21/2004 | WO2004042916A1 Simple self-biased cascode amplifier circuit |
| 05/21/2004 | WO2004042782A2 Apparatus and method for implementing a constant transconductance circuit |
| 05/21/2004 | WO2004013957A3 Circuit for power amplification |
| 05/21/2004 | WO2003103109A3 Power amplifiers |
| 05/20/2004 | US20040098232 Method and apparatus for operating a transmission amplifier |
| 05/20/2004 | US20040097213 Apparatus, methods and articles of manufacture for linear signal modification |
| 05/20/2004 | US20040097201 Apparatus and method for improving efficiency of power amplifier operating under large peak-to-average power ratio |
| 05/20/2004 | US20040095211 Tunable ferro-electric filter |
| 05/20/2004 | US20040095193 Radio frequency power amplifier adaptive bias control circuit |
| 05/20/2004 | US20040095192 Radio frequency power amplifier adaptive bias control circuit |
| 05/20/2004 | US20040095191 Apparatus, methods and articles of manufacture for electromagnetic processing |
| 05/20/2004 | US20040095163 Single-ended differential circuit using complementary devices |
| 05/19/2004 | EP1420513A1 Apparatus and method for improving efficiency of power amplifier operating under large peak-to average power ratio |
| 05/19/2004 | EP1419597A1 Method for improving quality of transmitted data using loopback during operation |
| 05/19/2004 | EP1419574A2 Power amplifier control |
| 05/19/2004 | EP1419573A1 Linearised radio transmitter |
| 05/19/2004 | CN1497996A High-frequency power amplifying electric unit and radio communication system |
| 05/19/2004 | CN1497840A Buffer circuit and driver IC |
| 05/19/2004 | CN1497838A Power amplifying circuit and method for supplying power by multiple required power output level |
| 05/19/2004 | CN1150799C High-fidelity and high-efficiency analog amplifier combined with digital amplifier |
| 05/19/2004 | CN1150690C Apparatus for simultaneous receiving/transmitting signal with low noise amplifier |
| 05/19/2004 | CN1150670C Method for improving stability of operation amplifier circuit under determined frequency |
| 05/18/2004 | US6738605 Method for optimizing an operating point of a power amplifier in a WCDMA mobile terminal |
| 05/18/2004 | US6738432 System and method for RF signal amplification |
| 05/18/2004 | US6738431 Method for neutralizing a transmitter tube |
| 05/18/2004 | US6737973 Amplifier modulation |
| 05/18/2004 | US6737948 Distributed circular geometry power amplifier architecture |
| 05/18/2004 | US6737930 Tunable planar capacitor |
| 05/18/2004 | US6737922 N-way RF power amplifier circuit with increased back-off capability and power added efficiency using unequal input power division |
| 05/18/2004 | US6737918 Distortion compensation apparatus |
| 05/18/2004 | US6737914 Removing effects of gain and phase mismatch in a linear amplification with nonlinear components (LINC) system |
| 05/13/2004 | WO2004040924A1 Method and apparatus for tailoring carrier power requirements according to availability in layered modulation systems |
| 05/13/2004 | WO2004040870A1 A method and system for broadband predistortion linearizaion |
| 05/13/2004 | WO2004040806A1 Amplitude and phase matching for layered modulation reception |
| 05/13/2004 | WO2004040751A1 Amplifier assembly |
| 05/13/2004 | WO2004040750A1 Amplifier bias circuit, method for biasing an amplifier and integrated circuit comprising an amplifier bias circuit |
| 05/13/2004 | WO2004040403A2 Lower complexity layered modulation signal processor |
| 05/13/2004 | WO2004030207A3 Variable gain amplifier |
| 05/13/2004 | WO2004025885A3 Apparatus and method, improving output signal from nonlinear device through dynamic signal pre-distortion based upon lagrange interpolation |
| 05/13/2004 | WO2003063339A3 A high performance bifet low noise amplifier |
| 05/13/2004 | US20040091035 Active filter circuit with dynamically modifiable internal gain |
| 05/13/2004 | US20040090270 Apparatus and method for indicating a difference between first and second voltage signals |
| 05/13/2004 | US20040090267 High-frequency power amplification electronic part and wireless communication system |
| 05/13/2004 | US20040090266 High frequency power amplifier apparatus and power amplifier module use the same |
| 05/13/2004 | DE10248149A1 Drive circuit for driving useful signal with frequency-stabilized signal feedback has feedback stage for frequency-dependent signal feedback of each useful signal amplified by amplification stage |
| 05/12/2004 | EP1418678A2 Front-end module and communication terminal |
| 05/12/2004 | EP1418562A2 Display appliance with audio processing circuit |
| 05/12/2004 | EP1417770A2 High efficiency wideband linear wireless power amplifier |
| 05/12/2004 | EP1346472A4 Closed loop active cancellation technique (act)-based rf power amplifier linearization architecture |
| 05/12/2004 | EP1293039A4 High linearity multicarrier rf amplifier |
| 05/12/2004 | EP1269655B1 Dynamic bias for rf power amplifiers |
| 05/12/2004 | EP1040567B1 Power amplification apparatus and method therefor |
| 05/12/2004 | CN1496605A Distributed circular geometry power amplifier architecture |
| 05/12/2004 | CN1496018A Radio communication device |
| 05/12/2004 | CN1149702C Filter with low-noise amplifier |
| 05/12/2004 | CN1149459C Biased circuit for accelerating recovery time optimization from waiting to excitation mode |
| 05/11/2004 | US6735424 S-band low-noise amplifier with self-adjusting bias for improved power consumption and dynamic range in a mobile environment |
| 05/11/2004 | US6735419 High efficiency wideband linear wireless power amplifier |
| 05/11/2004 | US6734746 Mute circuit |
| 05/11/2004 | US6734745 Oscillator and communication apparatus using the same |
| 05/11/2004 | US6734737 Output distortion correction amplifier system |
| 05/11/2004 | US6734733 Auxiliary amplifier in feedforward linearization amplification system |
| 05/11/2004 | US6734732 Adaptive linearizer for RF power amplifiers |
| 05/11/2004 | US6734731 Self-calibrated power amplifier linearizers |
| 05/11/2004 | US6734727 Feedforward amplifier, feedforward amplification method |
| 05/11/2004 | US6734726 Balanced distortion reduction circuit |
| 05/11/2004 | US6734725 Power amplifier |
| 05/11/2004 | US6734724 Power control and modulation of switched-mode power amplifiers with one or more stages |
| 05/06/2004 | WO2004038937A1 Transmitter |
| 05/06/2004 | WO2004038911A1 Power combiner |
| 05/06/2004 | WO2004038910A2 Predistortion linearizing |
| 05/06/2004 | WO2003017467A3 Adaptive biasing of rf power transistors |
| 05/06/2004 | US20040088134 Sense amplifier thermal correction scheme |
| 05/06/2004 | US20040087297 Frequency agile RF circuit |
| 05/06/2004 | US20040085239 Array antenna apparatus utilizing a nonlinear distortion compensator circuit |
| 05/06/2004 | US20040085152 Arrangement and method impedance matching |
| 05/06/2004 | US20040085135 Circuit and a method for controlling the bias current in a switched capacitor circuit |
| 05/06/2004 | US20040085134 Efficiency enhancement for MMIC amplifiers |
| 05/06/2004 | US20040085133 Multi-stage amplifier |
| 05/06/2004 | US20040085132 RF transistor amplifier linearity using suppressed third order transconductance |
| 05/06/2004 | US20040085131 Power transistor array temperature control system |
| 05/06/2004 | US20040085130 Simple self-biased cascode amplifier circuit |
| 05/06/2004 | US20040085127 Power amplifying method, power amplifier, and communication apparatus |
| 05/06/2004 | US20040085126 Accurate power detection for a multi-stage amplifier |
| 05/06/2004 | US20040085115 Source-follower circuit having low-loss output statge portion and drive device for liquid-display display device |
| 05/06/2004 | US20040085086 Predictive control boost current method and apparatus |
| 05/06/2004 | EP1416628A1 Amplification systems and methods using feedback loop |
| 05/06/2004 | EP1273098B1 Method for determining the parameters of an n-gate |
| 05/05/2004 | CN1494763A Automatic gain control circuit with high linearity and monotonically correlated offset voltage |
| 05/05/2004 | CN1494762A Audio reproducing apparatus and method |
| 05/05/2004 | CN1494741A Arrangement and method for impedance matching |
| 05/05/2004 | CN1148870C Parallel-stage power amplifier and its method for amplifying signal |
| 05/05/2004 | CN1148723C Arrangement comprising a magnetic write head, and write amplifier with capacitive feed forward compensation |
| 05/04/2004 | US6731919 Amplifier apparatus and method for controlling a local oscillator frequency based on the detected temperature of if bandpass filters |
| 05/04/2004 | US6731918 Signal strength detecting device with little temperature dependence |
| 05/04/2004 | US6731916 Power amplifying apparatus for mobile phone |
| 05/04/2004 | US6731915 Combined RF power detector and power precorrector |