H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements

Patents for H03F 3 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements (44,008)
12/2004
12/09/2004	US20040246053 Highly linear variable gain amplifier
12/09/2004	US20040246052 Load and line regulation using operational transconductance amplifier and operational amplifier in tandem
12/09/2004	US20040246051 Multi-band low noise amplifier
12/09/2004	US20040246050 Transmission circuit capable of efficiently operating a power amplifier
12/09/2004	US20040246049 Operational amplifier circuit, sample/hold circuit and filter circuit using the operational amplifier circuit
12/09/2004	US20040246046 Variable output-type constant current source circuit
12/09/2004	US20040245976 Constant voltage generating circuit and reference voltage generating circuit
12/09/2004	DE10297355T5 Mehrstufiger Hochfrequenz- und Hochleistungssignalverstärker A multi-stage high frequency and high power signal amplifier
12/09/2004	DE10297259T5 Automatisches Einstellen der LDMOS-Vorspannung mit Langzeitkompensation heißer Ladungsträger Automatically adjusting the bias voltage LDMOS with long-term compensation of hot carriers
12/09/2004	DE102004011719A1 Halbleitervorrichtung mit symmetrischer Schaltung zur Verwendung in einem Hochfrequenzband A semiconductor device having a symmetrical circuit for use in a high frequency band
12/08/2004	EP1484659A2 Variable output-type current source circuit
12/08/2004	EP1483830A2 Amplifier circuits and their use in radio frequency transmitters
12/08/2004	CN1553581A Multi-frequency band low-noise amplifier
12/07/2004	US6829352 Amplifier arrangement
12/07/2004	US6829278 Light emitting device and transistor
12/07/2004	US6828866 High noise rejection voltage-controlled ring oscillator architecture
12/07/2004	US6828862 RF power amplifier with low intermodulation distortion and reduced memory effect
12/07/2004	US6828861 Power amplifier with distributed capacitor
12/07/2004	US6828857 High gain, high bandwidth CMOS transimpedance amplifier
12/07/2004	US6828856 Amplifier gain boost circuitry and method
12/07/2004	US6828855 Class AB operational amplifier with split folded-cascode structure and method
12/07/2004	US6828854 Method and circuit for a dual supply amplifier
12/07/2004	US6828850 Method and system for charge pump active gate drive
12/07/2004	US6828831 Circuit for controlling field effect device transconductance
12/07/2004	US6828829 Semiconductor device having input buffers to which internally-generated reference voltages are applied
12/07/2004	US6828763 Voltage regulator
12/02/2004	WO2004105251A1 A sigma-delta modulator with reduced switching rate for use in class-d amplification
12/02/2004	WO2004105242A2 Method of estimating an intersection between at least two continuous signal representations
12/02/2004	WO2004105235A1 Dynamic method for limiting the reverse base-emitter voltage
12/02/2004	WO2004105234A1 Improvements in or relating to transconductor circuits
12/02/2004	WO2004105233A1 Method of estimating an intersection between at least two continuous signal representations
12/02/2004	WO2004105232A1 Amplification device
12/02/2004	WO2004088837A3 Doherty amplifier with output hybrid coupler
12/02/2004	WO2003107543A3 Sequential dc offset correction for amplifier chain
12/02/2004	US20040243950 Dynamic, digitally controlled, temperature compensated voltage reference
12/02/2004	US20040242171 Transmitter circuit, transmission circuit and driver unit
12/02/2004	US20040239542 Method and apparatus for efficient mixed signal processing in a digital amplifier
12/02/2004	US20040239437 Reflection loss suppression circuit
12/02/2004	US20040239429 Amplifier memory effect compensator
12/02/2004	US20040239427 Common mode bias control loop for output stages
12/02/2004	US20040239426 Operational amplifier generating desired feedback reference voltage allowing improved output characteristic
12/02/2004	US20040239425 Common-mode feedback circuit and differential operational amplifier circuit having stable operation and low power consumption
12/02/2004	US20040239424 Temperature compensated amplifier
12/02/2004	US20040239423 Transconductance control circuit of rail-to-rail differential input stages
12/02/2004	US20040239420 Power amplifier and radio communication device using the amplifier
12/02/2004	US20040239418 Mute circuit and BTL audio amplifier apparatus
12/02/2004	US20040239417 Amplifiers
12/02/2004	US20040239416 High-efficiency amplifier and method
12/02/2004	US20040239412 Circuit for controlling field effect device transconductance
12/02/2004	US20040239384 Interface circuit
12/02/2004	US20040239375 Sensor signal output circuit
12/02/2004	US20040239303 Low-power bandgap reference circuits having relatively less components
12/01/2004	EP1192712A4 Offset and non-linearity compensated amplifier and method
12/01/2004	EP1147600A4 Noise reduction scheme for operational amplifiers
12/01/2004	EP1135769B1 Circuit for reduction and optimization of write-to-read settling times in magnetic medium storage devices
12/01/2004	EP1125362A4 Linear transconductance circuits having class ab amplifiers parallel coupled with concave compensation circuits
12/01/2004	CN1552122A 放大器电路 The amplifier circuit
12/01/2004	CN1552121A 高频功率放大器电路 High-frequency power amplifier circuit
12/01/2004	CN1551492A Audio amplifier circuit and audio ic having the same
12/01/2004	CN1551491A Multiport amplifying apparatus using digital quadrature baseband hybrid circuit for each hybrid in input hybrid network
12/01/2004	CN1551490A Operational amplifier circuit, sample/hold circuit and filter circuit using the operational amplifier circuit
12/01/2004	CN1551489A Variable impedance circuit, amplifier, multiplier, high-frequency circuit using same
12/01/2004	CN1551487A 功率放大器电路 Power amplifier circuit
12/01/2004	CN1551486A Integratable, voltage-controlled RF power amplifier
12/01/2004	CN1551145A Difference generating device and optical disk device using said device
12/01/2004	CN1178400C Method and apparatus for wireless phone transmit power amplification with reduced power consumption
12/01/2004	CN1178380C Radio frequency receiver and radio frequency device with fast charging of input capacitance and method
12/01/2004	CN1178379C RF signal amplifier unit, transmission device and transmtiting terminal-antenna
12/01/2004	CN1178378C Method and apparatus for controlling the common mode impedance misbalance of an isolated sigle-ended circuit
12/01/2004	CN1178117C Amplifier for amplifying input signal
11/2004
11/30/2004	US6826503 Physical quantity detection equipment
11/30/2004	US6826390 Receiver, transceiver circuit, signal transmission method, and signal transmission system
11/30/2004	US6825818 Tunable matching circuit
11/30/2004	US6825739 Switched capacitor circuit
11/30/2004	US6825727 Radio frequency power transistor avalanche breakdown detection circuit and method therefor
11/30/2004	US6825725 Integrated power amplifier circuit
11/30/2004	US6825724 Amplifier and method for processing signals
11/30/2004	US6825723 Low noise gain-controlled amplifier
11/30/2004	US6825722 Mixer and differential amplifier having bandpass frequency selectivity
11/30/2004	US6825721 Amplifier gain boost circuitry and method
11/30/2004	US6825717 Feedback network and amplifier and/or converter circuit with a feedback network
11/30/2004	US6825716 System and apparatus for reducing offset voltages in folding amplifiers
11/25/2004	WO2004102792A1 Systems and methods for providing multi channel pulse width modulated audio with staggered outputs
11/25/2004	WO2004102790A2 Digital switching power amplifier
11/25/2004	WO2004102789A2 Wideband constant-gain voltage amplifier
11/25/2004	WO2004102788A2 Rf amplifier employing active load linearization
11/25/2004	WO2004086616A3 Clip detection in pwm amplifier
11/25/2004	WO2004073164A3 Distortion cancellation for rf amplifiers using complementary biasing circuitry
11/25/2004	US20040237007 Vector monitor, related method of controlling a transmitter and transmitter employing the same
11/25/2004	US20040235435 Switchless combining of multi-carrier coherent and incoherent carriers
11/25/2004	US20040234077 Audio sound quality enhancement apparatus
11/25/2004	US20040233086 Stable high-order delta-sigma error feedback modulators, and noise transfer functions for use in such modulators
11/25/2004	US20040232993 Multi-band low noise amplifier
11/25/2004	US20040232992 Bias current supply circuit and amplification circuit
11/25/2004	US20040232989 Integratable, voltage-controlled RF power amplifier
11/25/2004	US20040232988 High frequency differential circuit, differential amplifier, differential mixer, differential oscillator, and radio circuit using same
11/25/2004	US20040232987 Amplifier with fixed input impedance operated in various gain modes
11/25/2004	US20040232979 Efficient minimum pulse spread spectrum modulation for filterless class d amplifiers
11/25/2004	US20040232978 Filterless class D amplifiers using spread spectrum PWM modulation
11/25/2004	US20040232970 Level shift circuit

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