H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements

Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272)
10/2004
10/21/2004	US20040207468 Power amplification circuit and method for supplying power at a plurality of desired power output levels
10/21/2004	US20040207466 Systems and methods for providing multi channel pulse width modulated audio with staggered outputs
10/20/2004	EP1469607A2 Handset radiofrequency front end module in fine pitch quad flat no lead (FQFP-N) package
10/20/2004	EP1469593A2 A distortion compensation circuit and a transmission apparatus
10/20/2004	EP1469592A1 Apparatus for and method of controlling the base bias voltage of an HBT
10/20/2004	EP1468487A2 A high performance bifet low noise amplifier
10/20/2004	CN1539199A Methods and apparatus for signal distortion correction
10/20/2004	CN1539198A Time alignment of signals
10/20/2004	CN1172432C Amplifier load regulating system based on memory
10/19/2004	US6807040 Over-current protection circuit and method
10/19/2004	US6806855 Liquid crystal panel driving circuit and method of driving a liquid crystal panel
10/19/2004	US6806776 Transconductor tuning circuit
10/19/2004	US6806775 Power amplifier circuit
10/19/2004	US6806774 Power amplifier and communication device including power amplifier
10/19/2004	US6806772 Power transistor array temperature control system
10/19/2004	US6806771 Multimode output stage converting differential to single-ended signals using current-mode input signals
10/19/2004	US6806769 Differential amplifier
10/19/2004	US6806767 Power amplifier with load switching circuit
10/19/2004	US6806766 BTL amplifying system
10/19/2004	US6806745 Sample-and-hold amplifier circuit and pipelined A/D and D/A converters using sample hold amplification circuit
10/19/2004	US6806106 Bond wire tuning of RF power transistors and amplifiers
10/15/2004	CA2425700A1 Utilizing vacuum tubes in computer audio circuitry
10/14/2004	WO2004088945A1 Method and apparatus for linearization in a quadrature transmitter
10/14/2004	WO2004088838A1 Linear amplifier
10/14/2004	WO2004088837A2 Doherty amplifier with output hybrid coupler
10/14/2004	WO2004088836A1 Power amplifier and a rf transmitter and terminal including the amplifier
10/14/2004	US20040204162 Preventing power-on audio output noise in a wireless telephone handset
10/14/2004	US20040203544 Low noise switching voltage regulator
10/14/2004	US20040203542 Pre-distortion apparatus and method for recovering nonlinear distortion of high power amplifier
10/14/2004	US20040203540 Combined RF peak suppression and pre-distortion circuit
10/14/2004	US20040201424 Idss RF amplifier
10/14/2004	US20040201423 Handset radiofrequency front end module in fine pitch quad flat no lead (FQFP-N) package
10/14/2004	US20040201422 Power amplifier system
10/14/2004	US20040201421 Apparatus, methods and articles of manufacture for power amplifier control in a communication system
10/14/2004	US20040201419 Amplifying circuit
10/14/2004	US20040201418 Power supply processing for power amplifiers
10/14/2004	US20040201417 Differential amplifier, two-stage amplifier including the differential amplifier, and analog-to-digital converter including the differential amplifier
10/14/2004	US20040201412 Source follower, voltage follower, and semiconductor device
10/13/2004	EP1467482A1 Feedback linearised transmitter circuit
10/13/2004	EP1467481A1 Glitch-free controllable RF power amplifier
10/13/2004	EP1466408A1 Improvements in or relating to power amplifiers
10/13/2004	EP1466407A2 Modulator- amplifier
10/13/2004	EP1466406A2 Direct conversion of low power high linearity receiver
10/13/2004	EP1382115B1 Automatic optimization of linearity for envelope feedback rf amplifier linearization
10/13/2004	EP1273100B1 Balanced circuit arrangement
10/13/2004	EP1042865B1 Pulse referenced control method for enhanced power amplification of a pulse modulated signal
10/13/2004	EP0988693A4 Error extraction using autocalibrating rf correlator
10/13/2004	EP0861520A4 Small signal linearization in power switching amplifiers
10/13/2004	CN1537358A Active bias circuit
10/13/2004	CN1537343A Tuning multiplexer
10/13/2004	CN1171422C Transmitter
10/13/2004	CN1171380C Broad-band driver circuit
10/12/2004	US6804500 High frequency circuit using high output amplifier cell block and low output amplifier cell block
10/12/2004	US6803824 Dynamic matching in cascode circuits
10/12/2004	US6803822 Power amplifier having a bias current control circuit
10/12/2004	US6803816 Switching power amplifier
10/12/2004	US6803809 Step-down circuit for generating a stable internal voltage
10/12/2004	US6803802 Switched-capacitor integrator
10/12/2004	CA2361298C Impedance matching low noise amplifier having a bypass switch
10/07/2004	WO2004086638A2 Method for calibration of a signal receiver
10/07/2004	WO2004086616A2 Clip detection in pwm amplifier
10/07/2004	WO2004086614A1 Multi-chip pwm synchronization and communication
10/07/2004	WO2004086613A1 Amplifier circuit
10/07/2004	WO2004086612A1 Semiconductor circuit
10/07/2004	WO2004086611A2 Systems and methods for implementing a sample rate converter using hardware and software to maximize speed and flexibility
10/07/2004	WO2004086609A1 Systems and methods for protection of audio amplifier circuits
10/07/2004	WO2004086608A1 Neutralization of feedback capacitance in amplifiers
10/07/2004	WO2004086607A1 Power amplifier pre-distortion
10/07/2004	WO2004086606A2 Amplifier circuit
10/07/2004	WO2004070562A9 System and method for notification and escalation of medical data alerts
10/07/2004	WO2004045226A3 Continuously variable gain radio frequency driver amplifier having linear in decibel gain control characteristics
10/07/2004	WO2004045065A3 Accurate power detection for a multi-stage amplifier
10/07/2004	WO2004042782A3 Apparatus and method for implementing a constant transconductance circuit
10/07/2004	US20040198414 System and method for eliminating signal zero crossings in single and multiple channel communication systems
10/07/2004	US20040198273 Apparatus for mobile communication system
10/07/2004	US20040198271 Envelope-tracking amplifier for improving gain, Method for improving efficiency thereof, and terminal device of mobile communication applied to the same
10/07/2004	US20040198270 Continuous closed-loop power control system including modulation injection in a wireless transceiver power amplifier
10/07/2004	US20040198269 Linearization of amplified feedback distortion
10/07/2004	US20040198268 Adaptive controller for linearization of transmitter
10/07/2004	US20040198263 Radio with a distortion compensation capability
10/07/2004	US20040196922 Independence between paths that predistort for memory and memory-less distortion in power amplifiers
10/07/2004	US20040196899 Method and arrangement for a power amplifier
10/07/2004	US20040196121 Band switchable filter
10/07/2004	US20040196104 RF amplifier with improved impedance matching
10/07/2004	US20040196102 Bias current control in transistors
10/07/2004	US20040196099 Audio amplifier circuit
10/07/2004	US20040196098 Dual amplifier circuit and TFT display driving circuit using the same
10/07/2004	US20040196087 Variable time constant circuit and filter circuit using the same
10/07/2004	US20040196072 Circuit and method for over-current sensing and control
10/07/2004	DE10334068A1 Amplifier arrangement, e.g. for mobile radio receiver, has changeover device for selecting one of several resistances in feedback branches and/or cross-branch
10/07/2004	DE10320705A1 Electronic fingerprint sensor has a differential amplifier with a feedback loop, with one amplifier input connected to a signal source and the other to at least a sensor element and the amplifier output
10/07/2004	DE10312435A1 Transmission and reception amplifier circuit for transceiver device incorporating at least one common amplfication stage for both amplifiers
10/06/2004	EP1465379A1 Transmission device
10/06/2004	EP1465335A1 Low noise light receiver
10/06/2004	EP1464112A2 Methods of optimising power amplifier efficiency and closed-loop power amplifier controllers
10/06/2004	CN1535497A System and method of RF power amplification
10/06/2004	CN1534865A Low noise light receiver
10/06/2004	CN1534667A Booster circuit
10/06/2004	CN1170362C FR communication amplifier circuit capalbe of preventing diode protection circuit from generating electromagnetic interference
10/06/2004	CN1170361C RF communication amplifier circuit capable of preventing electromagnetic interference of emitter loop

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