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8160267 |
Car audio equipment
In order to enable a driver to obtain traffic jam information or to listen to a navigation guidance voice from a car navigation system without interrupting the reproduction of music when a...
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8150563 |
Anti-theft system for a vehicle, and method for the operation of an anti-theft system
An anti-theft system, especially in the form of an access and/or starting system for a vehicle has a vehicle-mounted receiver for receiving a request signal containing the instruction to find out...
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8144897 |
Adjusting acoustic speaker output based on an estimated degree of seal of an ear about a speaker port
A degree of seal of an ear about a speaker port may be estimated by detecting touch contact between the ear and at least one touch sensor in fixed relation to the speaker port. The degree of seal...
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8068801 |
Electric wave receiving apparatus
An electric wave receiving apparatus comprises: an antenna; an amplifier; filter circuits that extract signals in different frequency bands from an output of the amplifier; detector circuits that...
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7738847 |
Automatic gain control for a tuner
The circuit arrangement comprises a tuner with a control amplifier and a mixer connected downstream, and an automatic gain control. The automatic gain control contains a weighting filter, which is...
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7729673 |
Method and apparatus for multichannel signal limiting
A method and apparatus provide multichannel signal limiting to prevent any channel signal within a multichannel signal from exceeding defined limits, while still preserving the gain and/or...
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7714654 |
Amplifier and amplifier gain adjustment circuitry using current steering, and multimode communication device containing same
Disclosed is a multi-mode radio frequency amplifier. The amplifier includes a plurality of input transistors, a plurality of output branches, and a switching stage interposed between the plurality...
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7680519 |
Handsfree apparatus including volume control
In a vehicular navigation system, “AT command +CIEV” is received from a cellular phone by a BLUETOOTH communications. The received “+CIEV” is determined to identify a phoning state (or call state) ...
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RE41131 |
Portable telephone capable of increasing facility of operation
In a portable telephone which transmits and receives data having at least one of a voice signal and an image datum which are radio signals, the controlling device controls an amplifier so that a...
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7653159 |
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...
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7596355 |
System and method capable of closed loop MIMO calibration
An embodiment of the present invention provides a method of closed loop MIMO calibration in a wireless communication system, comprising detecting that station calibration is obsolete and requires...
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7469051 |
Method and apparatus for maintaining audio level preferences in a communication device
An intelligent automatic volume control technique (100) for a communication device is provided that takes a measurement of the background audio environment at the time a user manually selects the...
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7469132 |
Transmission signal generating apparatus
In a transmission signal generating apparatus according to the present invention, a voice signal is amplified by a variable amplifier which varies its amplification factor in accordance with an...
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7412222 |
Quadrature correction method for analog television reception using direct-conversion tuners
A direct conversion radio frequency (RF) tuner includes a mixer generating I and Q quadrature components. A phase detection circuit generates a phase error measurement between the I quadrature...
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7389102 |
Method to improve CMFB phase margin of variable-output-bandwidth mixer
An improved method and apparatus for using common mode feedback to maintain a predetermined DC level for an intermediate frequency output signal. A common mode feedback capacitor-select switch...
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7283800 |
Adaptive mixer output filter bandwidth control for variable conversion gain down-conversion mixer
An improved adaptive mixer for use in the down conversion module of a wireless transceiver. The adaptive mixer comprises a conversion gain module that is operable to receive a radio frequency...
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7221918 |
Digital DC-offset correction circuit for an RF receiver
An RF receiver comprising a radio-frequency (RF) down-converter for receiving and down-converting an input RF signal to a lower frequency analog signal (e.g., an IF signal or baseband signal) and...
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7203471 |
System and method for selectively utilizing an attenuation device in a two-way radio receiver based on squelch detect and radio signal strength indication (RSSI)
A system and method used for controlling an attenuator in a two-way communication device (100, 200) includes the steps of measuring (211) a relative signal strength indication (RSSI) at the input...
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7200141 |
Bandwidth detection in a heterogeneous network with parallel and proxy modes
Effective bandwidth of a communication link is determined in a heterogeneous, packet switched network between a source and a destination, where effective bandwidth is defined as the actual...
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7171178 |
Tuning circuit having amplitude-varying function
A tuning circuit having an amplitude-varying function is disclosed that comprises a coil, a capacitor, and a resistance-adjusting element connected in parallel to the coil and the capacitor for...
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7171176 |
Tuner system self adaptive to signal environment
A circuit and method for adjusting the operating characteristics of a tuner in accordance with information derived from the signals being processed by the tuner. Depending upon signal type and/or...
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7035609 |
Method and apparatus for automatically identifying an antenna connected to a radio transmitter and for automatically controlling a transmitter
A transmission system or apparatus includes a transmitter or source of transmitted RF or microwave power which is selectively connectable via a transmitter connector to an antenna having an antenna...
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7003335 |
Sensing phone apparatus and method
Sensors measuring body conditions forward their data to a concentration point which transmits to a cellular phone through a wireless communication. The cellular phone incorporates a program which...
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6785522 |
Method for changing timbre during conversation in cellular phone
The invention relates to a cellular phone terminal system, and in particular to a method for changing timbre of a voice signal during conversation in a cellular phone terminal system having a...
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6760635 |
Automatic sound reproduction setting adjustment
Apparatus, article of manufacture, and method for automatic adjustment of sound reproduction settings on an audio or audio/visual system based on listener preference and/or experience is provided....
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6748092 |
Hearing aid with improved percentile estimator
The invention relates to a hearing aid, preferably a programmable hearing aid, having at least one microphone (1), at least one signal processor with at least one channel, an output amplifier (9)...
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6658245 |
Radio receiver having a dynamic bandwidth filter and method therefor
A radio receiver (100) has an IF (intermediate frequency) filter (200) for dynamically adjusting its intermediate frequency. The filter (200) includes a filter bank (301), power/amplitude estimator...
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6553084 |
Digital automatic gain control linearizer and digital automatic gain control circuit using the same
A digital automatic gain control linearizer for controlling a variable gain control element for automatically controlling gain, using an analog signal obtained by converting input digital data...
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6433673 |
Digital enunciator, process and communication system employing same
A receiver in a communication system is coupled to a transmission channel for receiving communication signals transmitted over a transmission channel. The receiver includes signal receiving...
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6242982 |
Amplifier with self setting automatic gain control circuit
An amplifier (125) having automatic gain control (AGC) includes a gain stage (220), having a variable amplifier (215), for amplifying a signal received by the amplifier (125). The amplifier (125)...
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6233462 |
Portable terminal device for automatically controlling transmitting voice level and calling sound level
A comparing unit 18, when a radio unit 1 receives a radio signal, compares an ambient noise level detected by a noise sensor 17 with a preset threshold value. If the ambient noise level is smaller...
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6175730 |
Radio receiver with a potentiometer as volume control
A radio receiver with a potentiometer as the volume control is described, wherein an unintentional displacement of the potentiometer during the switched-off phase becomes effective only with a...
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6169569 |
Cable modem tuner
A cable modem is configured to include a tuner having a front end which includes a duplex filter stage and a decoupler stage and a rear end which includes a single conversion tuner. The duplex...
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6137397 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Digital enunciator, process and communication system employing same
A receiver in a communication system is coupled to a transmission channel for receiving communication signals transmitted over a transmission channel. The receiver includes signal receiving...
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6128478 |
Apparatus and method for amplifying a radio frequency signal
A communication device employs a method and apparatus for amplifying a radio frequency (RF) signal that eliminates the need for a signal splitter. An RF input signal (202) is coupled to a first RF...
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6049722 |
Radio communication apparatus for use in dual-mode radio communication system and having factor variable control means dependent on the set mode
A dual mode radio communication apparatus according to the invention has a reception speech signal output circuit for processing an analog demodulation signal in an analog mode and a digital...
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6043721 |
Dual band amplifier
An amplifier (104) for a dual band device includes multiple amplifier stages coupled between an input (103) and output (105). The amplifier stages include a first amplifier stage (200) having a...
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5940143 |
High-definition television signal receiving apparatus and gain control circuit thereof
An automatic gain controlling circuit and a high-definition television signal receiving apparatus includes an input terminal for receiving a signal including first and second signal components...
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5884153 |
Delayed automatic gain control circuit
A delayed automatic gain control circuit using a simple delayed AGC voltage generation section and capable of fixing a start point of AGC in an RF amplification section at a predetermined received...
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5805979 |
Control apparatus and control method for attenuating radio signal
A radio apparatus judges whether the electric field intensity of a radio signal detected by a level detector is high by a comparator. The radio apparatus detects a synchronizing signal for making...
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5749056 |
Audio ramping technique for a radio
An audio ramping technique (200) reduces acoustic shock in radio (100) that has multiple operating modes each having a different nominal audio speaker level. The ramping technique (200) sets the...
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5678221 |
Apparatus and method for substantially eliminating noise in an audible output signal
A method and apparatus, performed by a communication unit (101), for substantially eliminating undesired noise in an audible output signal (113) while a determined quality measure (114) of a...
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5649307 |
Method and apparatus for option control in a radio accessory
An option select scheme (300) and circuit (200) allows a single analog-to-digital (A/D) line (211) to be used between an accessory (204) and a portable radio (202) to control first and second...
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5631714 |
Apparatus for automatically adapting the mean sound level of a television receiver
A system for automatically adapting the mean sound level of a television receiver. The system for automatically adapting the mean sound level of a television receiver comprises an adapting module...
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5604927 |
Receiver having an adjustable bandwidth filter
A radio receiver has a frequency down conversion stage including a first passive filter tuned to a lower frequency. An amplifier functioning as a voltage-to-current converter includes a resistor...
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5584056 |
Dual-bandwidth cellular telephone switching apparatus
A dual-bandwidth cellular telephone switching apparatus comprising a signal receiver, the signal receiver including an antenna for receiving radio frequency signals on a field corresponding to...
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5561433 |
Apparatus and method for aligning a receiving antenna utilizing an audible tone
A satellite receiver for digitally encoded television signals includes apparatus for generating a signal indicating the alignment of the receiving antenna which is responsive to the number of...
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5555451 |
High-quality reception indicating circuit for scanning AM recievers
The reception quality of an AM broadcast signal is determined within a very short time of tuning to the channel frequency by modifying the intermediate frequency signal to remove the audio...
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5548830 |
Dual-band frequency-selective attenuator for automatic gain control
Automatic gain control in a radio receiver is provided using a pair of saturable reactors in resonant circuits for providing variable attenuation. One resonant circuit has a frequency above the...
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5542102 |
Method and apparatus for simultaneously controlling base station and external electronic device functions
A base station (102) automatically remotes to a speakerphone mode of operation and connects an incoming call while an external electronic device (104) is simultaneously controlled.
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