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| Number | Title | Issue Date |
| 7415262 | Wireless access point power control An access point in a wireless network receives link margin values from associated access points. The access point determines sensitivity values for the associated access points and determines a lower access point output power value from the sensitivity values. Beaco... | 08/19/2008 |
| 7340233 | Integrated circuit and methods for third sub harmonic up conversion and down conversion of signals An integrated circuit may include a receiver and/or a transmitter that performs third order sub-harmonic conversion. The integrated circuit may include a Gilbert cell active mixer with three or more serially-connected transistors in each of the mixer's four branches... | 03/04/2008 |
| 7337450 | Electronic apparatus When a sliding plate slides forward by the rotating force of a motor, the lower part of a movable member is driven and the movable member set in a vertical state moves forward with the vertical state maintained, and the movable member is then rotated and inclined. W... | 02/26/2008 |
| 7336940 | Frequency conversion techniques using antiphase mixing A frequency upconverter using mixers operating on one or more signals and inverted versions thereof and a subtractor, such as a balun, for subtractively combining the mixer outputs to produce an upconverted signal. ... | 02/26/2008 |
| 7321253 | Multiplier A conventional multiplier which uses a MOS transistor has a subject that, in order to compensate for a variation of a bias voltage or the like, it is necessary to add a complicated correcting circuit to an outputting section or the like, and the circuit scale become... | 01/22/2008 |
| 7260422 | Monolithic optical autocompensation read-out circuit for distance dependent loudness control in mobile phones A circuit and method are given, to realize a loudness control for mobile phone earpieces and speakers with the help of a proximity sensor, which is realized as an infrared photo-electric guard circuit, where only very few external parts are needed. As a novelty here... | 08/21/2007 |
| 7254164 | Method for transconductance linearization for DC-coupled applications A Class AB voltage-to-current converter includes a plurality of DC coupled transconductance stages that produce a linearized output and a biasing circuit. The biasing circuit generates a primary bias voltage that is greater than a generated secondary bias voltage. A... | 08/07/2007 |
| 7224996 | Mobile information device, method of controlling mobile information device, and program A mobile information device has an operation unit which detects an operation by a user, a detection unit which detects a predetermined state when operated by the user, and a control unit which validates or invalidates the operation of the operation unit, depending o... | 05/29/2007 |
| 7218909 | Integrated low noise amplifier An integrated circuit (IC) low noise amplifier includes an on-chip balun and an on-chip differential amplifier. The on-chip balun is operably coupled to convert a single-ended signal into a differential signal. The on-chip differential amplifier is operably coupled ... | 05/15/2007 |
| 7206849 | Communication in a wireless communications network when a mobile computer terminal may be unreachable A method and apparatus for communication between a mobile computer terminal and a host computer in a system in which it is necessary for the mobile computer terminal to send a message to the host computer at a particular time. The specific time at which the mobile c... | 04/17/2007 |
| 7196739 | Multi-channel tuner apparatus A multi-channel tuner apparatus is provided which is capable of simultaneously and independently selecting a plurality of channels for reception. The apparatus comprises a plurality of tuners, each of which converts a selected channel to a near-zero intermediate fre... | 03/27/2007 |
| 7194246 | Methods and systems for down-converting a signal using a complementary transistor structure Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal are described herein. Briefly stated, such methods, systems, and apparatuses operate by receiving an EM signal and an aliasing signal having an aliasing ra... | 03/20/2007 |
| 7183791 | Reliability circuit for applying an AC stress signal or DC measurement to a transistor device An integrated circuit is provided, which includes a transistor device under test, an AC drive circuit, an AC bias circuit and a DC bias circuit. The AC drive circuit generates an AC drive signal. The AC bias circuit biases the transistor device under AC bias conditi... | 02/27/2007 |
| 7176737 | Phase-locked loop and delay-locked loop including differential delay cells having differential control inputs A differential delay cell is provided herein that not only receives a pair of differential input values, but also receives a pair of differential control values for delaying the differential input values to produce a pair of differential output values. As such, a de... | 02/13/2007 |
| 7161406 | Method and apparatus for providing non 2:1 Gilbert cell mixer A method and apparatus for providing non 2:1 current in a Gilbert cell mixer is disclosed. The Gilbert cell mixer provides lower voltage operation, lower LO drive and better linearity. Additional current sources are provided to drive the lower, source-coupled transi... | 01/09/2007 |
| 7146149 | High isolation switch buffer for frequency hopping radios A local oscillator (LO) circuit is disclosed which provides improved isolation between the unselected LO source and a mixer. The LO circuit includes a first LO source to generate a first periodic signal cycling at a first frequency, a second LO source to generate a ... | 12/05/2006 |
| 7142683 | Computer with acoustic driver built into acoustically leaky chassis A desktop computer which has a driver mounted in the back wall of the chassis. The chassis is acoustically a very leaky box, so the driver is designed as if it were a free-space driver (using large cone area and long throw). In one class of embodiments, a single dri... | 11/28/2006 |
| 7139546 | Up-conversion of a down-converted baseband signal in a direct conversion architecture without the baseband signal passing through active elements A direct conversion circuit that not only down-converts the received modulated signal using a down-converting mixer into a baseband signal, but also, after performing a passive low pass filtering to remove higher-order components, performs up-conversion of the baseb... | 11/21/2006 |
| 7138857 | Signal processing device for mobile radio A signal processing device includes a conversion device configured to output a differential current signal at two taps on the basis of an input signal and an oscillator signal. A respective controllable current source is coupled to one of the two taps. An amplificat... | 11/21/2006 |
| 7130705 | System and method for microphone gain adjust based on speaker orientation A system and method for automatically adjusting the gain of an audio system as a speaker's head moves relative to a microphone includes using a video of the speaker to determine an orientation of the speaker's head relative to the microphone and, hence, a gain adjus... | 10/31/2006 |
| 7127229 | Emergency report cellular phone, cellular connection switching method and GPS positioning method The object of the present invention is to provide a cellular phone to be used for emergency reports that performs GPS positioning by means of remote control from an emergency report center, and transmits positional information to the emergency report center. The eme... | 10/24/2006 |
| 7106232 | Analog multiplexer and variable gain amplifier for intermediate frequency applications A diversity receiver circuit system (10) including a primary channel (20) and a diversity channel (22), where analog input signals are converted to differential signals in both channels (20, 22). The receiver circuit system (10) in... | 09/12/2006 |
| 7103395 | Folding mobile terminal device capable of receiving and transmitting sound while folded When an incoming call is received, a control unit confirms using an open/close sensor whether or not a mobile terminal device is in the close state. When the mobile terminal device is folded, the control unit establishes a communications state, changes the amplifica... | 09/05/2006 |
| 7099646 | Signal mixer having a single-ended input and a differential output A single-ended-to-differential mixer includes a differential input circuit having a single-ended input. The differential input circuit is responsive to a single-ended input signal to generate first and second signals. The single-ended-to-differential mixer includes ... | 08/29/2006 |
| 7076268 | Preventing inadvertent striking of keys and like buttons in handheld palm-type devices when such devices are not in handheld usage A handheld palm-type device senses that it is being held in a human hand, but not any specific human hand. It can sense whether it is held in any human hand. A handheld palm-type device with keys for data entry and apparatus for preventing inadvertent striking of th... | 07/11/2006 |
| 7076675 | Display power management of a portable communication device that detects a continuous talk condition based on a push-to-talk button being activated a predetermined number of times A portable communication product (10) such as a cellular phone includes a transceiver radio having a microphone (20), an earpiece (22), a keypad (18) and a display (12) coupled to the transceiver radio. The portable communication p... | 07/11/2006 |
| 7065155 | Method and apparatus for a transceiver having a constant power output The present invention includes a transceiver and a method of operating the same that includes in the transmitter a power control circuit that operates on an analog differential signal containing data packets individually. The power control circuit initially transmit... | 06/20/2006 |
| 7065328 | Superregenerative AM demodulator An AM receiver incorporates an antenna, a transistor, a current source, and a power supply. The antenna is connected to a gate electrode of the transistor and through a link to a signal earth. In operation, the antenna receives radiation and generates a correspondin... | 06/20/2006 |
| 7058430 | Mobile communications terminal with a hands-free mode A mobile communications terminal is provided having a first loudspeaker for emitting sound signals in a normal mode of the communications terminal, a second loudspeaker for emitting sound signals in a hands-free mode of the communications terminal, an antenna and a ... | 06/06/2006 |
| 7046122 | Receiver circuit A detector receiver circuit for use as a wake-up detector for detecting an amplitude modulated carrier signal includes an antenna for receiving the modulated carrier signal; and a transistor, such as an FET, which is connected to the antenna and configured to operat... | 05/16/2006 |
| 7040670 | Coupling apparatus The present invention relates to an alternative pipe coupling apparatus, to conventional tapered screw threads usually used to join ends of pipe sections to fixtures. The invention utilizes a bayonet style interlocking arrangement having a male element and a female ... | 05/09/2006 |
| 7039386 | Cellular base station broadcast method and system In the method, an emergency broadcast station receives report of an impending or current disaster-related situation from a local authority. The geographic area to be affected by the impending or current disaster-related situation is served by an existing communicati... | 05/02/2006 |
| 7035615 | Mixer circuit having improved even order noise, DC offset, and linearity characteristic The present invention relates to improvement of even order distortion noise, DC offset, and non-linearity of mixer circuits. According to the present invention, a mixer circuit is provided, which comprises a splitter for splitting an input signal to the first and se... | 04/25/2006 |
| 7031144 | Reversible display apparatus and method for appliances An apparatus and method for displaying interaction or an appliance, such as an incubator, provides a display module having a display face angled relative to the vertical plane. The display face can be angled upwardly or downwardly to face the line of sight of a user... | 04/18/2006 |
| 7010098 | Ultrasonic proximity detector for a telephone device An ultrasonic proximity detector for a telephone device to detect the proximity of an object thereto includes an ultrasound signal generator generating ultrasound that is broadcast by a speaker of the telephone device. Processing circuitry is coupled to a microphone... | 03/07/2006 |
| 6977557 | Injection mode steering oscillator A means is provided to establish oscillations on a particular mode or resonance of a quartz crystal in a crystal oscillator and to discriminate against other modes. This is done by injecting a signal close in frequency to the desired mode until oscillation have been... | 12/20/2005 |
| 6970689 | Programmable mixer for reducing local oscillator feedthrough and radio applications thereof A state of a programmable mixer is set during a calibration phase to minimize local oscillator feedthrough. During a calibration phase, inputs to the programmable mixer are set to zero, or to a known state and the local oscillator is set to a calibration frequency. ... | 11/29/2005 |
| 6937845 | High-frequency module and radio device using the same A high-frequency module includes first to fifth terminals, a high-pass filter, a high-frequency switch, a transmitter-side balun, and a receiver-side balun. The high-pass filter is connected to the high-frequency switch, and the high-frequency switch is also connect... | 08/30/2005 |
| 6909885 | RF modulator and switch having high antenna isolation An RF modulator/switch selectably couples a locally generated and conducted RF signal or an antenna RF signal to a broadcast radio receiver. A local RF input receives the conducted RF signal. An antenna RF input receives the antenna RF signal in response to a radiat... | 06/21/2005 |
| 6873837 | Emergency reporting system and terminal apparatus therein An emergency reporting apparatus for a vehicle includes a microphone, a loudspeaker, and a handsfree system circuit. Handsfree two-way speech communication with an emergency report receiving center is allowed via the microphone, the loudspeaker, and the handsfree sy... | 03/29/2005 |
