| Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008) |
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| 07/29/2008 | US7405620 Differential amplifier and method |
| 07/29/2008 | US7405615 Method of impulse acreage modulation digital power processing and its device |
| 07/24/2008 | WO2008089182A1 Multi-stage amplifier with multiple sets of fixed and variable voltage rails |
| 07/24/2008 | WO2008088965A2 Tail-current steering circuit and method for rail-to-rail operational amplifier input stage |
| 07/24/2008 | WO2008088025A1 Amplification circuit and radio communication device |
| 07/24/2008 | WO2008086997A1 Amplification circuit having an integrated test circuit |
| 07/24/2008 | WO2008086609A1 Comparator with complementary differential input stages |
| 07/24/2008 | WO2008065379A3 Near field rf communicators and near field rf communications-enabled devices |
| 07/24/2008 | WO2008028034A3 High speed, high current gain voltage buffer and method |
| 07/24/2008 | WO2007104055A3 High efficiency load insensitive power amplifier |
| 07/24/2008 | WO2005107060A3 Method and system for compensating for phase variations caused by transmitter activation |
| 07/24/2008 | US20080175404 Power amplification for parametric loudspeakers |
| 07/24/2008 | US20080175073 Sense amplifiers and semiconductor memory devices for reducing power consumption and methods for operating the same |
| 07/24/2008 | US20080174382 System method and apparatus for a three-line balun with power amplifier bias |
| 07/24/2008 | US20080174378 Method of adjusting the resonance frequency of an l-c resonant circuit and resonant circuit |
| 07/24/2008 | US20080174372 Multi-stage amplifier with multiple sets of fixed and variable voltage rails |
| 07/24/2008 | US20080174371 Layout of power device |
| 07/24/2008 | US20080174370 Systems and methods for high frequency electronic power conversion and amplification |
| 07/24/2008 | US20080174369 High speed, high current gain voltage buffer and method |
| 07/24/2008 | US20080174368 Electron turbulence damping circuit for a complimentary-symmetry amplification unit |
| 07/24/2008 | US20080174367 Tail-current steering circuit and method for rail-to-rail operational amplifier input stage |
| 07/24/2008 | US20080174366 Low Distortion Switching Amplifier Circuits and Methods |
| 07/24/2008 | DE102007060430A1 Integrierte Halbleiter-Schaltung The semiconductor integrated circuit |
| 07/24/2008 | DE102006055135B3 Verstärkereinrichtung Amplifier device |
| 07/23/2008 | EP1946444A2 Power conversion regulator with exponentiating feedback loop |
| 07/23/2008 | EP1946443A2 Feedback controller for pwm amplifier |
| 07/23/2008 | EP1946442A2 Wideband circuits and methods |
| 07/23/2008 | EP1946440A1 A transconductance stage arrangement |
| 07/23/2008 | EP1946439A1 Method and arrangement for optimizing efficiency of a power amplifier |
| 07/23/2008 | CN201088625Y Double closed loops controlling system of high frequency electrotome |
| 07/23/2008 | CN101228689A Highly efficient amplifier |
| 07/23/2008 | CN101227177A Power control method of uniform amplitude signal power amplifier |
| 07/23/2008 | CN101227174A Broad band charge amplifier and design method thereof |
| 07/23/2008 | CN101227173A Method of forming an operational amplifier and structure thereof |
| 07/23/2008 | CN101227172A Simulated D class amplifier |
| 07/23/2008 | CN101227171A Linearisation device with pre-distortion with adjustable amplitude and curve |
| 07/23/2008 | CN101226342A Programmed control slow-starting high stabilization great current drive device |
| 07/23/2008 | CN101226207A Active variable impedance synthesizer |
| 07/23/2008 | CN100405740C Digital differential amplification control device |
| 07/22/2008 | US7403626 Level adjustment apparatus |
| 07/22/2008 | US7403072 Integrated circuit devices having a control circuit for biasing an amplifier output stage and methods of operating the same |
| 07/22/2008 | US7403071 High linearity and low noise amplifier with continuously variable gain control |
| 07/22/2008 | US7403069 Trifferential amplifier and trifferential amplifier system |
| 07/22/2008 | US7403066 Method and system for creating a spectral null in a switching amplifier |
| 07/22/2008 | US7403065 Differential transimpedance amplifier circuit for correlated differential amplification |
| 07/22/2008 | US7403063 Apparatus and method for tuning center frequency of a filter |
| 07/22/2008 | US7403045 Comparator circuit with reduced switching noise |
| 07/22/2008 | US7403037 Signal amplifier |
| 07/22/2008 | US7402984 Oscillation sensor for linear regulation circuit |
| 07/17/2008 | WO2008085519A1 Single input dual output voltage power supply and method therefor |
| 07/17/2008 | WO2008085353A1 Current switched circuit for switch mode power amplifiers |
| 07/17/2008 | WO2008084852A1 Transmission power control method and transmission device |
| 07/17/2008 | WO2008084851A1 Transmission device and transmission power control method |
| 07/17/2008 | WO2008084850A1 Polar modulation transmission device and transmission power control method |
| 07/17/2008 | WO2008065375A3 Near field rf communicators and near field rf communications-enabled devices |
| 07/17/2008 | US20080169878 Low loss combiner for narrowband and wideband rf signals |
| 07/17/2008 | US20080169877 Amplifier for use in radio-frequency band |
| 07/17/2008 | US20080169876 Method of forming an operational amplifier and structure therefor |
| 07/17/2008 | US20080169875 Level-Shifting Buffer |
| 07/17/2008 | US20080169874 Tunable microwave devices with auto-adjusting matching circuit |
| 07/17/2008 | US20080169870 Current drive circuit reducing vds dependency |
| 07/16/2008 | EP1944865A1 Amplifier, amplifying method and filter |
| 07/16/2008 | EP1943728A1 Bypass device for microwave amplifier unit |
| 07/16/2008 | EP1523804A4 Variable gain amplifier with autobiasing supply regulation |
| 07/16/2008 | EP1417757B1 Systems and methods for pulse width modulation |
| 07/16/2008 | EP1380102B1 High duty cycle offset compensation for operational amplifiers |
| 07/16/2008 | EP1346470B1 Multiplexed input envelope restoration scheme for linear high-efficiency power amplification |
| 07/16/2008 | CN101222231A Output circuit, digital analog circuit and display device |
| 07/16/2008 | CN101222216A Comparator |
| 07/16/2008 | CN101222209A Dynamic bandwidth compensating method and associated apparatus |
| 07/16/2008 | CN101222208A Protection and automatic restoring system |
| 07/16/2008 | CN101222207A Filterless class D power amplifier |
| 07/16/2008 | CN101221714A 驱动装置及其驱动方法 Device and its driving method |
| 07/16/2008 | CN100403650C Power amplifier protector of double-frequency portable terminal and its protection method |
| 07/16/2008 | CN100403491C Semiconductor device manufacturing method |
| 07/15/2008 | US7400864 Method and apparatus for compensating for phase variations caused by activation of an amplifier |
| 07/15/2008 | US7400863 Switch apparatus, switchable power amplification apparatus, and mobile communication terminal apparatus using the same |
| 07/15/2008 | US7400203 Circuit with Q-enhancement cell having feedback loop |
| 07/15/2008 | US7400202 Bias circuit for power amplifier operated by a low external reference voltage |
| 07/15/2008 | US7400201 Apparatus and method for reducing drain modulation of high power transistor |
| 07/15/2008 | US7400200 Linear variable gain traveling wave amplifier |
| 07/15/2008 | US7400199 Semiconductor integrated circuit apparatus |
| 07/15/2008 | US7400198 Active circuit having improved linearity using multiple gated transistor |
| 07/15/2008 | US7400196 Ultra wide band, differential input/output, high frequency amplifier in an integrated circuit |
| 07/15/2008 | US7400195 Variable-gain differential amplifier |
| 07/15/2008 | US7400194 Method of amplifying a digital signal and device therefor |
| 07/15/2008 | US7400193 Ultra wide band, differential input/output, high frequency active splitter in an integrated circuit |
| 07/15/2008 | US7400192 Low noise amplifier and differential amplifier with variable gain mode |
| 07/15/2008 | US7400191 Switching power amplifier |
| 07/15/2008 | US7400177 Amplifier circuit having constant output swing range and stable delay time |
| 07/15/2008 | US7399952 Image processing apparatus and image capturing apparatus |
| 07/10/2008 | WO2008083128A1 Two-stage amplification using intermediate non-linear square wave |
| 07/10/2008 | WO2008081887A1 Δσ modulation digital-analog converter, digital signal processing method, and av device |
| 07/10/2008 | WO2008081632A1 Polar-modulation transmission device |
| 07/10/2008 | WO2008081246A2 Phase and power calibration in active antennas |
| 07/10/2008 | WO2008060498A3 Noise reduction system and method for audio switching amplifier |
| 07/10/2008 | WO2008051917A3 Inter-stage matching network to enhance common mode stability |
| 07/10/2008 | WO2008050273A3 Class d amplifier |
| 07/10/2008 | WO2008050270A3 A commutating auto zero amplifier |
| 07/10/2008 | WO2008048771A3 Pulsed load modulation amplifier and method |