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| Number | Title | Issue Date |
| 8180307 | Electric device An electric device for receiving a radio frequency (RF) signal is provided. The electric device includes an antenna, a first power amplifier, a battery, a second filter and a second power amplifier. The antenna is used for receiving and outputting a RF signal. The f... | 05/15/2012 |
| 8116705 | Simplified high frequency tuner and tuning method A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the chan... | 02/14/2012 |
| 8060042 | Method and an apparatus for processing an audio signal A signal processing apparatus and method thereof are disclosed. The present invention includes receiving a low frequency downmix signal including a multi channel signal, phase shift information and spatial information corresponding to parameter band of the low frequ... | 11/15/2011 |
| 8027652 | Radio front end A radio front end utilizes at least one band pass filter to pass only the appropriate frequency band. Once the desired frequency band has been isolated it is converted to a digital format in an analog to digital converter and a digital signal processing device inter... | 09/27/2011 |
| 7680471 | System and method for prolonging wireless data product's life Digital upgrade system and method for translating analog commands and digital commands in wireless customer services premises equipment (CPE). The digital upgrade system receives a command from a CPE Host and translates the command from analog to digital in order to... | 03/16/2010 |
| 7647031 | Vehicle receiver system in which a single receiver circuit is controlled to receive signals transmitted from a plurality of remote devices having respectively different transmission frequencies A vehicle-mounted receiver system includes a receiver apparatus that is controlled for receiving, in common, transmissions from a plurality of external devices such as a remote key, smart key, etc., having respectively different transmission frequencies. The receivi... | 01/12/2010 |
| 7376402 | Multiband RDS radio receiver A radio receiver having an FM band tuner, an AM band tuner, a controller coupled to both said tuners, and a radio data (RD) decoder for providing radio data. The RD decoder is coupled for receiving radio data from at least one of the tuners which is tuned to a radio... | 05/20/2008 |
| 7362998 | Mobile military satellite receiver architecture for accommodating wide carrier offset and method of performing coarse carrier offset adjustment A coarse carrier offset adapter for determining a coarse carrier offset for application to a received satellite signal, a method of performing coarse carrier offset adjustment and a time division multiplexing (TDM) satellite receiver. In one embodiment, the adapter ... | 04/22/2008 |
| 7359671 | Multiple channel wireless communication system A wireless audio distribution system may have a wireless transmitter, responsive to a plurality of audio input channels, for transmitting signals carrying the audio, a receiver, responsive to the transmitted signals for selecting one or more of the audio input chann... | 04/15/2008 |
| 7353008 | Method and system for optimizing decibel data conversion A Method and System for Optimizing Decibel Data Conversion. This invention provides an ability to convert linear signals into decibel units via digital logic circuitry. The resultant system can present information to users in real-time. This is made possible by perf... | 04/01/2008 |
| 7343140 | Tuner A tuner is provided for selecting, independently of each other, a plurality of radio frequency channels for simultaneous reception. The tuner comprises a plurality of up converters whose outputs are combined in a combiner. Each up converter operates independently of... | 03/11/2008 |
| 7338328 | Cigarette lighter adapter device that interfaces with an external device via a port interface A CLA device comprises a CLA plug that is insertable into an external CLA socket, for example, a DC CLA socket inside a vehicle. The CLA device has a housing coupled to the CLA plug, for example, by integration or via a tethered wire, with the housing having a suppo... | 03/04/2008 |
| 7274916 | Differential signal receiver and method A differential signal receiver and method is disclosed. One embodiment relates to a receiver for receiving a differential signal. The receiver includes a first voltage-to-current converter that converts the voltage received at a first input to a first current, and a... | 09/25/2007 |
| 7236758 | Integrated wireless multimedia integrated circuit An integrated circuit having a transmit chain configured to provide direct FM modulation of a voltage controlled oscillator of a frequency synthesizer by a composite signal that includes audio and video components, and a receive chain configured to provide a televis... | 06/26/2007 |
| 7233778 | Apparatus and method for converting a signal from a first analog format to a second analog format An apparatus for converting a signal from a first analog format to a second analog format. The apparatus has an input port, a first converter, filters, first mixers, second converters, and an output port. The input port is configured to receive the signal. The signa... | 06/19/2007 |
| 7233769 | Multiple channel wireless communication system A wireless audio distribution system may include a wireless transmitter transmititing an encoded digital bitstream serially combining each of a plurality of audio input channels and control data, a wireless receiver receiving the transmitted bitstream, a manual sele... | 06/19/2007 |
| 7212794 | Receiver with a crystal oscillator having a natural-oscillation frequency set so that a fundamental component and its harmonics are outside the range of a receiving band of a modulated wave signal A receiver in which the sneaking noise from a crystal oscillator is reduced. A high-frequency amplifier circuit 11, a mixing circuit 12, a local oscillator 13, intermediate-frequency filters 14 and 16, an intermediate-frequency amp... | 05/01/2007 |
| 7177662 | Multimode wireless communication device A multimode wireless communication includes a digital baseband processing module, an analog to digital converter module, a digital to analog converter module, a first radio section, and a second radio section. The digital baseband processing module is operably coupl... | 02/13/2007 |
| 7174135 | Wideband signal transmission system Described is a transmission system (10) comprising a transmitter (12) for transmitting a narrowband audio signal to a receiver (14) via a transmission channel (16). The receiver (14) comprises a frequency domain bandwidth extender ... | 02/06/2007 |
| 7162532 | System and method for listening to teams in a race event A computer-implemented method and system allows a remote computer user to listen to teams in a race event. The method includes receiving audio signals from a plurality of audio sources at the race event; transmitting at least some of the audio signals to a remote co... | 01/09/2007 |
| 7162000 | Delay locked loop synthesizer with multiple outputs and digital modulation A delay locked loop circuit (200) in which multiple outputs are produced. A single delay line (24) is shared among multiple tap selection circuits (256A, 265B, 265C). Fixed phase shifts (412) can be introduced between multip... | 01/09/2007 |
| 7154978 | Cascaded delay locked loop circuit A delay locked loop frequency synthesizer in several embodiments uses a primary delay line element (24) and one or more secondary delay elements (162 . . . 164, 270, 310). In one embodiment, a main delay line (24) is used to coarsely select a fr... | 12/26/2006 |
| 7123892 | Architecture for an AM/FM digital intermediate frequency radio An AM/FM DIF radio has an IF to audio converter that provides an audio signal from an IF signal responsive to a clock signal. During the processing of the IF signal, a spurious signal is intentionally generated. The spurious signal is based on the predetermined offs... | 10/17/2006 |
| 7120405 | Wide bandwidth transceiver The wide bandwidth transceiver includes a receiver section, a transmitter section, and a local oscillation module. The receiver section includes a 1st receiver intermediate frequency (IF) stage, a receiver switch module, and a 2nd receiver IF s... | 10/10/2006 |
| 7102498 | Remote keyless entry system with two modes of demodulation A remote signaling receiver system includes a receiver that operates in two different modes of demodulation to accommodate different types of signals from different types of transmitting devices. A first demodulator, preferably an ASK demodulator, is adapted to proc... | 09/05/2006 |
| 7076204 | Multiple channel wireless communication system A wireless transmission device for communicating a plurality of audio streams to remote devices may include a plurality of inputs for receiving a plurality of digital audio streams, a combiner connected to the inputs for combining control codes and the received audi... | 07/11/2006 |
| 7020452 | Actively matched center-tapped marchand balanced mixer An apparatus comprising an amplifier circuit, a tuning circuit and a mixer circuit. The amplifier circuit may be configured to generate an output signal at a first node in response to an input signal received through a second node. A tuning circuit may be (i) couple... | 03/28/2006 |
| 7015870 | Integrated bi-band inductance and applications A multi-band inductive circuit in an integrated circuit, including at least two parallel branches respectively including a first inductance and a second inductance in series with a capacitor, the two inductances being coupled to each other. ... | 03/21/2006 |
| 7010231 | System and method of high-speed transmission and appropriate transmission apparatus At a receiver a 20 Gbit/s soliton bit stream (20) is demultiplexed into two 10 Gbit/s bit streams (22a, 22b) using a 2-way splitter (6), a clock extraction circuit (4), and a pair of polarization insensitive amplitude... | 03/07/2006 |
| 7010271 | Circuits and methods for reducing interference from switched mode circuits A system 100 including a radio receiver 101/108 and switched mode circuitry 114/115 operating at a selected switching frequency is disclosed. Circuitry 207–209 sets the switching-circuitry of the switched mode circuitry 114/115 a... | 03/07/2006 |
| 6993312 | Double balanced diode mixer with high output third order intercept point A double balanced mixer consisting of an RF balun, a local oscillator balun and a diode “quad” bridge circuit connected between the two baluns and where the IF output is taken at the center tap of the RF balun secondary transformer. A second harmonic termination... | 01/31/2006 |
| 6987947 | Multiple channel wireless communication system A wireless audio distribution system having a wireless transmitter, responsive to a plurality of audio input channels, for transmitting a encoded digital bitstream serially combining each of the audio input channel, the encoded digital bitstream further including co... | 01/17/2006 |
| 6946924 | Low noise voltage controlled oscillator A voltage controlled oscillator, comprising a pair of transistors connected to a tank circuit, said tank circuit including a plurality of tuning diodes connected in parallel with an inductor, said tuning diodes having cathodes connected to a common connection. ... | 09/20/2005 |
| 6934342 | Automatic modulation type discrimination apparatus and automatic modulation type discrimination method capable of discriminating plural kinds of modulation types A analog/digital modulation type discrimination circuit 1 discriminates whether a reception signal is an analog modulation type, a linear modulation type or a non-linear modulation type by digital modulation type. In case where the reception signal is discriminated ... | 08/23/2005 |
| 6925265 | System and method of high-speed transmission and appropriate transmission apparatus Soliton or soliton-like optical pulses with characteristics adapted to propagation in an optical line for RZ type transmission are generated by modulating a continuous optical signal (1) by means of a modulator (2) which is substantially devoid of chir... | 08/02/2005 |
| 6915109 | Method of operating a remote control system and a remote control system comprising an RF transmission and receiving system In a method of operating a remote control system and in such a system comprising an RF transmission and receiving system and an IR transmission device the sub-carrier information of the IR signal is transmitted in the RF signal in a signal separate from the envelope... | 07/05/2005 |
| 6904269 | Signal type identification A method of identifying a signal type uses parameters of the signal as a basis for automatic identification. A signal of interest is selected from a display of a spectral waveform for a specified frequency. An occupied bandwidth for the signal of interest is estimat... | 06/07/2005 |
| 6904108 | Bandpass-limiting device for a receiver In a bandwidth-limiting apparatus, control is performed of the oscillation frequencies of each of three local oscillators of three intermediate-frequency circuits, and the passband is limited by adjusting the width of and shifting the IF, the intermediate frequency ... | 06/07/2005 |
| 6847108 | Semiconductor integrated circuit A pin layout which prevents degradation of a frequency characteristic of a low noise amplifier and a receiving mixer included in a semiconductor integrated circuit for dual-band transmission/reception wherein the circuit of the low noise amplifier is provided at a p... | 01/25/2005 |
| 6771942 | Receiver In a receiver, either an FM/AM signal to be used for a keyless entry system or a high frequency signal to be used for an automobile audio system for FM broadcast is applied to a first converter. An IF limiter amplifier amplifies the output signal of the converter an... | 08/03/2004 |
