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| Number | Title | Issue Date |
| 7054395 | Automatic gain control for digital demodulation apparatus A digital demodulation apparatus automatically controls gain based on a state of receiving a digital modulated signal. The digital demodulation apparatus amplifies a digital modulated signal wave received through the air with the gain automatically controlled so as ... | 05/30/2006 |
| 7054296 | Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation Frequency translation and applications of same are described herein, including wireless local area network (WLAN) applications such as IEEE Standard 802.11 WLANs. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, ... | 05/30/2006 |
| 7053961 | System and method for TV automatic gain control (AGC) In a terrestrial mode of a TV having analog and digital capability, the RF gain is controlled using the TV's IF tuner output. In a digital cable mode the RF gain is controlled using the output of the TV's IF SAW filter, and in an analog cable mode the RF gain is con... | 05/30/2006 |
| 7054609 | Linearity improvement of Gilbert mixers Method and system are disclosed for providing an improved linearity Gilbert mixer. The Gilbert mixer of the present invention includes a conventional mixer core coupled to a high linearity, multistage amplifier. The multistage amplifier includes two or more transist... | 05/30/2006 |
| 7050774 | AGC circuit of an FM receiver that reduces interference while maintaining high reception sensitivity A first AGC voltage and a second AGC voltage are taken from the final stage of a radio-frequency circuit and the output side of a bandpass filter, respectively, and the gain of the radio-frequency circuit is controlled on the basis of the two AGC voltages. The pass-... | 05/23/2006 |
| 7050515 | Front end automatic gain control circuit using a control word generator A control word generator comprised of circuitry to generate a control word to control an attenuator. The control word generator includes a counter that increments at a clock rate much higher than the refresh rate at which the error signal is recalculated. The counte... | 05/23/2006 |
| 7050779 | Semiconductor integrated circuit device The thermal interference due to the self heating of transistors constituting a gilbert cell circuit is reduced, thereby largely improving the receiving sensitivity to signals. A mixer circuit composed of a gilbert cell circuit comprises transistors T1 to T... | 05/23/2006 |
| 7046976 | Receiving device with automatic gain control The invention aims to minimize the analogue/digital converter over-dimensioning within the framework of reception of signals originating from a satellite and exhibiting power levels which can vary over time. The invention proposes a technique of automatic gain contr... | 05/16/2006 |
| 7046749 | Narrowband gain control of receiver with digital post filtering An Automatic Gain Control (AGC) circuit as used in a digital receiver that utilizes a main loop filter that is of a relatively wide bandwidth. A pre-filter, wideband variance is determined from the input digital signal, and a post-filter, narrowband variance is also... | 05/16/2006 |
| 7047185 | Method and apparatus for dynamically switching between speech coders of a mobile unit as a function of received signal quality A power management system for a mobile unit wherein the mobile unit detects the quality of the signals received from the base station. Based on this signal quality, the mobile unit determines if the voice data could be adequately transmitted using a secondary speech... | 05/16/2006 |
| 7042292 | Gain control circuit, and a radio communication apparatus using the same A gain control circuit comprises a variable gain circuit having a predetermined gain control range and a control voltage supply circuit for supplying an internal control voltage to the variable gain circuit as a gain control signal. In this gain control circuit, the... | 05/09/2006 |
| 7039377 | Switchable gain amplifier A switchable gain amplifier for use in mobile communications devices is provided, having a first amplifier stage having a first gain, a second amplifier stage connected in parallel with the first amplifier stage. The first and second amplifier stage have different g... | 05/02/2006 |
| 7039376 | AGC amplifier circuit for use in a digital satellite broadcast receiver apparatus An AGC amplifier circuit has a fixed-gain amplifier, of which the gain is not controlled by an AGC voltage, and a variable-gain amplifier, of which the gain is controlled by the AGC voltage, that are connected in parallel. When the AGC voltage is within a predetermi... | 05/02/2006 |
| 7039372 | Method and system for frequency up-conversion with modulation embodiments A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In ... | 05/02/2006 |
| 7039095 | Receiving apparatus and gain control method A code generation section 106 outputs a primary code stored in a code storage section 105 at a predetermined timing. A despreading section 107 measures a delay profile by correlation between the output signals of an analog-to-digital conversion ... | 05/02/2006 |
| 7039379 | Method for maintaining automatic gain control settings for a multi-frequency communication device In time divisioned, multi-frequency communication air interfaces it is common for a control channel to be defined on a first frequency while traffic channels are carried on other frequencies. A mobile communication device maintains the automatic gain control (AGC) s... | 05/02/2006 |
| 7039378 | Method and apparatus for estimating and controlling initial time slot gain in a wireless communication system In a time-division duplex (TDD) system, a reliable initialization scheme that is applicable to an automatic gain controller (AGC) at a base station is implemented in various forms depending on the availability of certain information such as signal-to-interference ra... | 05/02/2006 |
| 7035350 | Bluetooth access code assisted initial DC estimation and frame synchronization A system for calculating DC offset and achieving frame detection is described. In one embodiment, the present invention includes an electronic device with an integrated receiver module. The receiver module can take advantage of a known synchronization pattern such a... | 04/25/2006 |
| 7035610 | AGC circuit of receiver using several local oscillation frequencies An AGC circuit maintains a fixed level for starting AGC operation for an interference wave even if the local oscillation frequency is switched in a receiver that has a plurality of local oscillation frequencies. A frequency correction circuit for correcting the conv... | 04/25/2006 |
| 7035351 | Automatic gain control loop apparatus A DC offset cancelling circuit with multiple feedback loops suppresses DC offset voltages within an automatic gain control loop apparatus. The apparatus includes a plurality of gain stages connected in series that receive and amplify an input RF signal. Each gain st... | 04/25/2006 |
| 7031409 | Fully digital AGC circuit with wide dynamic range and method of operation A digital automatic gain control (AGC) circuit for use in a radio frequency (RF) receiver. The AGC circuit comprises: 1) a first shifter for receiving an in-phase signal as a first series of X-bit samples and left-shifting each X-bit sample by a number of bits deter... | 04/18/2006 |
| 7030692 | Circuit and method for controlling gain in an amplifier A circuit is provided for controlling the gain of an amplifier, such as an amplifier that may be used in telecommunication devices. The circuit includes an analog portion that receives signals from one or more mixers and that produces an output that is an inverse lo... | 04/18/2006 |
| 7031685 | Receiver for regenerating a signal wave via digital signal processing Detection output from a detection circuit 17 is converted to digital detection data D1 and supplied to an AGC circuit AGCC and a noise clamping circuit NCC that are formed by digital circuits. In the AGC circuit AGCC, a digital low pass filter 19 | 04/18/2006 |
| 7030795 | Digital automatic gain control method and device An automatic gain control device (110) includes a peak detector (202) configured to receive a current output of an ADC (108) and to compare it to a previous output to produce a peak value. The automatic gain control device (110) also incl... | 04/18/2006 |
| 7027786 | Carrier and clock recovery using universal frequency translation Coherent detection of a received EM signal using universal frequency translation (UFT) is described herein. The received EM signal is sampled according to a sub-harmonic LO signal, where the LO signal is in frequency and phase coherence with the received EM signal. ... | 04/11/2006 |
| 7026866 | DC offset self-calibration system for a switching amplifier Techniques for DC offset cancellation are described. According to one embodiment, an amplifier has at least one output and first and second supply rails. The amplifier includes offset cancellation logic which is operable in a calibration mode to generate a first off... | 04/11/2006 |
| 7027785 | Transmitter RF power control An electronic system for accurately controlling the RF output power from a power amplifier (21) is implemented using a multiplier (28) which multiplies the output power by itself to provide a DC component which is fed to a variable gain amplifier (2... | 04/11/2006 |
| 7027788 | System and method for receiving a signal A system for receiving a signal is provided. The system includes a receiver that is operable to receive the signal, but which may also receive a noise signal. A duty cycle system is connected to the receiver. The duty cycle system can turn the receiver off and on at... | 04/11/2006 |
| 7027793 | Direct conversion with variable amplitude LO signals Techniques to reduce LO leakage by controlling the amplitude of LO signal based on the level of output signal after the frequency conversion process. An LO generator receives a VCO signal and generates an LO signal having a variable amplitude and a frequency that is... | 04/11/2006 |
| 7024169 | AMPS receiver using a zero-IF architecture An AMPS receiver system utilizing a ZIF architecture and processing received forward link signals in the digital domain. The AMPS receiver system includes an antenna (105), a direct converter (110), high dynamic A/D converters (120,130), low pas... | 04/04/2006 |
| 7020449 | Fast settling variable gain amplifier with DC offset cancellation A variable gain amplifier includes circuit elements that may be partially powered down during transmit modes of operation and that may be powered back up whenever the radio transceiver receives a data packet within a specified settle time even for high throughput RF... | 03/28/2006 |
| 7019642 | Wide area multipurpose tracking system A method of electronically tracking and locating a very large number of objects such as, but not limited to, personal case files in health care, law, or human services systems is described. Each object to be tracked has an attached miniature radio transmitter called... | 03/28/2006 |
| 7015758 | Gain control circuit, and a radio communication apparatus using the same A gain control circuit comprises a variable gain circuit having a predetermined gain control range and a control voltage supply circuit for supplying an internal control voltage to the variable gain circuit as a gain control signal. In this gain control circuit, the... | 03/21/2006 |
| 7010330 | Power dissipation reduction in wireless transceivers Methods and circuits for reducing power dissipation in wireless transceivers and other electronic circuits and systems. Embodiments of the present invention use bias current reduction, impedance scaling, and gain changes either separately or in combination to reduce... | 03/07/2006 |
| 7010286 | Apparatus, system, and method for down-converting and up-converting electromagnetic signals Methods, systems, and apparatuses for down-converting and up-converting an electromagnetic signal. In embodiments, the invention operates by receiving an electromagnetic signal and recursively operating on approximate half cycles of a carrier signal. The recursive o... | 03/07/2006 |
| 7010016 | Method and WCDMA receiver for high-rate and low-rate physical channel reception A spread-spectrum receiver has a high-rate path to receive multi-rate channels and a low-rate path to receive fixed-rate channels. In a wideband code division multiple access (WCDMA) embodiment, the high-rate path despreads multi-rate physical channels having a vari... | 03/07/2006 |
| 7006583 | Method and apparatus for receiving differential ultra wideband signals A receiver may receive ultra-wideband, spread-spectrum differential signals. In some embodiments, the receiver may use a variable bandwidth low pass filter. Lowering or raising the bandwidth of the low pass filter may improve performance in particular wideband signa... | 02/28/2006 |
| 7006805 | Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service A receiver having multi-mode and multi-band functionality and capabilities is described herein. The receiver is capable of selectively operating over a plurality of bands and channels. The receiver operates in a plurality of modes, including but not limited to a sin... | 02/28/2006 |
| 7006797 | Coherence frequency determining system and associated radio apparatus The invention provides an apparatus and a method for determining the frequency of a radio frequency signal. The coherency of a received signal is determined and only the frequency of a coherent signal is determined. Zero amplitude transitions of coherent signals are... | 02/28/2006 |
| 7003272 | Radio apparatus with adjustable reception quality A radio apparatus (95), particularly for mobile radio, which makes it possible to adjust the signal reception in a predeterminably optimized way is proposed. The radio apparatus (95) includes a receiver part (1) and an evaluation unit (5)... | 02/21/2006 |
