Class 455/194.2 - Amplifier controlled

Subclass of Class 455 - Telecommunications
Definition: Subject matter wherein the means includes an amplifier in
No. of patents: 32
Last issue date: 09/30/2008

Number	Title	Issue Date
7430405	Radio communication terminal and gain control circuit for the same A gain control circuit has a transmission power amplifier that amplifies a transmission signal to a predetermined level. An adjacent channel leak power ratio monitor finds a ratio of a distortion element corresponding to an adjacent channel leak power to a main elem...	09/30/2008
7414676	Integrated programmable tuner An integrated tuner is programmable to optimize its components for either analog signal reception or digital signal reception. Power to the components is increased for analog operation and decreased for digital operation. The tuner also includes a selectable and int...	08/19/2008
7412219	High-frequency amplifier having simple circuit structure and television tuner using high-frequency amplifier A high-frequency amplifier includes first and second amplifying stages disposed in parallel for amplifying VHF/UHF television signals. The first amplifying stage includes a first FET and a second FET of a grounded-gate type connected in series between a common input...	08/12/2008
7340277	Adaptive antenna for controlling the weighting on a plurality of antenna elements An optical subscriber system according to the present invention has an adaptive antenna having a plurality of antenna elements, for controlling the weighting on the antenna elements thereby to radiate beams that are adapted to radio wave environments, a position est...	03/04/2008
7327794	Method and apparatus for detecting a jammed channel in a block oriented digital communication system A method and apparatus for detecting a channel jammed by narrowband jamming interference in a block oriented digital transmission system such as an orthogonal frequency division multiplexing (OFDM) or discrete multi-tone (DMT) system. A spectrum of a received data b...	02/05/2008
7324787	Method of ramping up output level of power amplifier of radio communication system, communication semiconductor integrated circuit, and radio communication system In a radio communication system having a phase control loop for phase modulation and an amplitude control loop for amplitude modulation and being capable of time divisional transmission and reception under a predetermined time management, when transmission in a firs...	01/29/2008
7312716	Wireless communication using an intrinsically safe design for use in a hazardous area A wireless circuit setup is used in a hazardous area where the circuit is intrinsically safe and does not require explosion proof containment. In this setup, an intrinsically safe master barrier (420) is used without the use of a resistor and one or more resi...	12/25/2007
7308239	Receiver for receiving amplitude shift keying signal A receiver for receiving an amplitude shift keying signal includes: a threshold signal generating circuit that has a first diode to which a received amplitude shift keying signal is inputted and generates a threshold signal which practically follows a peak value of ...	12/11/2007
7305218	RF switch An RF switch is disclosed. Power of an amplifier installed in an RF switch of a TV receiver is adjusted by using a Schmitt trigger circuit. If an output voltage of an RF automatic gain controller of a tuner is greater than a pre-set upper limit threshold value, the ...	12/04/2007
7302241	Wireless receiver without AGC A wireless communication unit (300) incorporates a receiver comprising radio frequency circuitry (210, 220, 230, 240) for receiving a radio frequency signal and converting the radio frequency signal to a low frequency signal. A signal level adjustment circuit receiv...	11/27/2007
7254194	Automatic gain control for communication receivers A communication receiver amplifies a pulse-amplitude-modulated (PAM) signal representing an integer-valued sequence of first data elements (D1) with an adjustable first gain (G1) and digitizes the amplified signal to produce a sequence of second data e...	08/07/2007
7200370	Power amplifier having enhanced swing cascode architecture A Radio Frequency (RF) power amplifier includes a transconductance stage, an AC coupling element, and a cascode stage. The transconductance stage is adapted to receive an input RF voltage signal and to produce an output RF current signal. The cascode stage is adapte...	04/03/2007
7148747	Apparatus for automatically controlling a gain of a power amplifier and associated methods An apparatus for automatically controlling a gain of a power amplifier includes a reception-signal detecting unit which detects a reception signal; a reference-voltage generating unit which generates a reference voltage; a gain control voltage detecting unit which c...	12/12/2006
7136618	Satellite broadcast receiving converter with lower power consumption A control portion detects the presence or absence of a pulse signal provided from a satellite broadcast receiver through a port PO to output a control signal PDOUT. In accordance with control signal PDOUT, a power supply circuit stops a supply of one of a power supp...	11/14/2006
7123899	Broadband single-ended input upconverter An upconverter for mixing a single-ended RF signal with a differential local oscillator signal to generate a differential IF signal, that includes a source degenerated first differential pair comprising matched first and second transistors, each having source, gate ...	10/17/2006
7113744	Adaptive radio transceiver with a power amplifier An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ...	09/26/2006
7058370	Transmission power amplifier unit A transmission power amplifier unit of a base-station apparatus for compensating for non-linear distortion of a transmission power amplifier by feed-forward control is provided with a gain varying unit for varying gain of the transmission power amplifier unit. At st...	06/06/2006
7054604	Wireless signal amplification system and a television signal decoder comprising one such system A wireless signal amplification system including amplification apparatus (6) consisting of numerous different amplifiers (61 to 6n) which are distributed in an analogue processing chain (4). Also, a converter (12	05/30/2006
7053732	Multi-bit time delay adjuster unit for high RF applications and method A multi-bit time-delay adjuster with Radio Frequency (RF) MicroElectroMechanical (MEM) switches may be used in MultiCarrier Power Amplifiers (MCPAs) with a feed-forward linearization technique. The multi-bit time-delay adjuster makes it possible to automatically con...	05/30/2006
7035601	Data transmission method, base station and transmitter for compensating for non-linearities in a transmission chain A transmitter compensates for the non-linearities within a transmission chain. The transmitter includes, for instance, a first forming device for forming, on the basis of at least one set of signal properties, at least one state expansion vector comprising quantitie...	04/25/2006
7031682	Radio communication terminal and gain control circuit for the same A gain control circuit has a transmission power amplifier that amplifies a transmission signal to a predetermined level. An adjacent channel leak power ratio monitor finds a ratio of a distortion element corresponding to an adjacent channel leak power to a main elem...	04/18/2006
6985706	Feed forward amplifier system employing self-generating alignment lists and adaptive controller A method and apparatus for rapid alignment of adaptive feed forward power amplifiers are disclosed. Successful alignment settings are correlated with the operating conditions that affect the gain and phase of an amplifier. These operating conditions may include inpu...	01/10/2006
6930547	Linearizing LINC amplifiers using pre-distortion An input signal having amplitude information is pre-distorted and converted into two pre-distorted signals without amplitude information. The two pre-distorted signals are separately amplified and then recombined to generate a linearized amplified output signal havi...	08/16/2005
6915141	Secondary automatic gain control loops for direct conversion CDMA receivers A communications device includes a frequency conversion circuit and a control circuit. An antenna receives a radio signal at a first frequency and converts it into a radio frequency (RF) signal of the first frequency. The frequency conversion circuit is associated w...	07/05/2005
6829471	Digital baseband receiver in a multi-carrier power amplifier A power amplifier system and method for locating carrier frequencies across a frequency band, identifying the modulation format of each carrier, and locating and suppressing undesired intermodulation distortion (IMD) products generated by the power amplifier. The sy...	12/07/2004
6731916	Power amplifying apparatus for mobile phone A power amplifying apparatus for a mobile phone is provided. In the power amplifying apparatus, a power amplifier uses a transistor as a power amplifying device, and a non-volatile memory pre-records the static characteristic measurement data of the transistor. A DC...	05/04/2004
6408166	Method for controlling gain of transmission signal In accordance with the present invention, a method is disclosed for preventing noise spikes due to abrupt changes of a transmission signal in a cordless telephone. The method is comprised of two sub-methods where a first sub-method for controlling the gai...	06/18/2002
4627100	Wide band radio receiver A circuit arrangement for a wide band superheterodyne radio receiver for receiving wide band FM, narrow band FM, and AM modulated radio signals between 25 and 550 MHz. The first LO is a phase locked loop controlled VCO, with central processing unit contro...	12/02/1986
4547902	Radio receiver comprising a frequency locked loop with audio frequency feedback, and a muting circuit Radio-receiver having a frequency-locked loop which comprises, a tunable voltage-controlled oscillator, a mixer stage, a filtering element, as well as a frequency-voltage converter which is connected to the tunable voltage-controlled oscillator. Several s...	10/15/1985
4461036	Processor controlled scanning radio receiver There is disclosed a processor controlled scanning radio receiver which employs a microprocessor controller to operate in various modes. One mode of operation is a search/recall mode wherein frequencies located during an automatic search operation are sto...	07/17/1984
4238771	Muting circuit A muting circuit for a television or AM signal receiver which uses a synchronous detector. The muting circuit includes an input terminal for receiving an amplitude modulated signal, a synchronous detector for detecting such AM signal, a circuit for supply...	12/09/1980
4123715	Program apparatus for radio receiver using frequency synthesizer There is disclosed a signal-seeking superheterodyne radio receiver for use on the public service radio frequencies capable of scanning among a plurality of channels and using frequency synthesizing apparatus to generate the required local oscillator signa...	10/31/1978

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Class 455/194.2 - Amplifier controlled