Abstract: A wireless transceiver capable of selectively receiving and transmitting as a direct sequence spread spectrum system or as a frequency hopping spread spectrum system is disclosed. The system is particularly suitable for use in a cordless telephone system. The transceiver includes components for both direct sequence spread spectrum transmission and reception and for frequency hopping spread spectrum transmission and reception.

Abstract: A wireless transceiver comprises a digital to analog converter having an input for receiving a digital representation of a direct sequence spread spectrum signal and having an analog output. A filter has an input coupled to the analog output of the digital to analog converter. An adder has a first input coupled to the filtered output and a second input coupled to a loop control voltage generated by a phase lock loop. A VCO integrated into the phase lock loop has a control input coupled to the summed output. An RF output of the VCO produces a continuous phase frequency shift keyed spread spectrum signal in response to the digital representation of the direct sequence spread spectrums signal. A receiver converts received RF signal to baseband in-phase and quadrature that are in turn converted to digitized signals. A demodulator produces chip data that is despread using a matched filter.

Abstract: According to one exemplary embodiment, a structure comprises a laminate substrate having a top surface for receiving a semiconductor die. The structure further comprises an antenna element situated on the top surface of the laminate substrate, where the antenna element is coupled to a laminate substrate bond pad. For example, the antenna element may also be coupled to the laminate substrate bond pad by a trace on the top surface of the laminate substrate. According to this exemplary embodiment, the structure further comprises a bonding wire that provides an electrical connection between the laminate substrate bond pad and a semiconductor die bond pad. For example, the input impedance of the antenna element coupled to the laminate substrate bond pad may match the output impedance at the semiconductor die bond pad. The structure may further comprise a capacitor coupled to the antenna element.

Abstract: A communication device that includes a base. The base includes a line interface for receiving incoming communications over a network line and sending outgoing communications over the network line, a communication transceiver for interfacing the communication device over a communication link to other communication devices in a same in-home network and for interfacing other communication devices in the same in-home network to the line interface via the communication link, and a storage medium for storing communication software that allows the communication device to communicate with other communication devices through the transceiver. The communication device also includes a processor coupled to the storage medium and to the line interface. The processor is configured to run the communication software and to receive incoming communications through the line interface and to send an outgoing communications through the line interface. The communication transceiver can be a RF short range transceiver.

Abstract: One exemplary embodiment is a structure comprising a laminate substrate having a top surface for receiving a semiconductor die. The exemplary structure further comprises an antenna element situated on a bottom surface of the laminate substrate, where the antenna element is suitable for connection to the semiconductor die. According to this exemplary embodiment, the structure further comprises a laminate substrate reference pad in the laminate substrate, where the laminate substrate reference pad is situated over the antenna element. The exemplary structure further comprises at least one laminate substrate reference via situated at a side of the antenna element. The at least one laminate substrate reference via can be electrically connected to the laminate substrate reference pad. The at least one laminate substrate reference via can be electrically coupled to a printed circuit board reference via in a printed circuit board.

Abstract: A system is provided for controlling amplification in a receiver. The receiver amplifies a signal in accordance with a controlled gain to enhance the reliability of demodulating the received signal. A lower frequency signal is derived by down-converting the received signal. The derived lower frequency signal is converted into a digital baseband signal. A compensatory direct current offset is determined by evaluation of one of trailing symbols and a defined sequence of a data packet of the received signal. A compensatory direct current offset is manipulated with respect to a digital baseband signal to compensate for an unwanted direct current offset of the digital baseband signal, indicative of a frequency difference between the received signal and the transmitted signal.

Abstract: Spread spectrum technology is being used in more and more wireless applications. Generally applications of spread spectrum include a fixed spread spectrum code size. In addition in applications that employ time domain duplex, some may employ a fixed duty cycle, for example 50% broadcast and 50% receive, for broadcast and receive functions. Many applications, such as cordless phones, also feature a fixed sampling rate for an input signal. By building systems in which these variables are not fixed but variable manufacturers can make generic type spread spectrum controllers which can be used in a variety of applications. These same circuits can also be controlled to give current devices enhanced characteristics by adjusting data rate for changing conditions, thereby enhancing their performance. By allowing the spreading code to be reduced in length, the data rate of the transmitted signal can be increased without adjusting the bandwidth of the amplifiers used to amplify the transmitted signal.

Abstract: This invention provides a communication device that is capable of interacting with a local wireless communication system when the communication device is within range of the local wireless communication system for controlling operating characteristics of the communication device. The communication device may include cellular telephones, mobile phones, voice pagers, data pagers, mobile computers, palm computers, mobile facsimile machines, mobile appliances, multimedia devices and other wireless communication devices. The local wireless communication system may be located in any site such as an office building, home, hotel, concert hall, movie theater, restaurant, conference room, or public transportation systems. When the local wireless communication system determines that a command is to be sent, the system may transmit a command to all communication devices that are within range of the local wireless communication system, or to a subset of them.

Abstract: An electrical apparatus which is configured with an antenna, transceiver, or repeater for transmission or reception over a wireless interface. In one embodiment, the appliance interfaces to a user device through a system which includes the power distribution system of the apparatus. In another embodiment, the apparatus, optionally in combination with a user device, forms a node of a wireless communication system.

Abstract: A system for controlling an output frequency of a dual-input voltage controlled oscillator relative to a reference frequency is provided. The method includes the step of coupling a first tune control signal to a first input of the dual-input voltage controlled oscillator. The method further includes the steps of dividing the output frequency of the dual-input voltage controlled oscillator by a value substantially equal to a second tune control signal, comparing a phase of the divided output frequency with a phase of the reference frequency and coupling a phase difference of the compared phases to a second input of the dual-input voltage controlled oscillator.

Abstract: A wireless transceiver comprises a digital to analog converter having an input for receiving a digital representation of a direct sequence spread spectrum signal and having an analog output. A filter has an input coupled to the analog output of the digital to analog converter. An adder has a first input coupled to the filtered output and a second input coupled to a loop control voltage generated by a phase lock loop. A VCO integrated into the phase lock loop has a control input coupled to the summed output. An RF output of the VCO produces a continuous phase frequency shift keyed spread spectrum signal in response to the digital representation of the direct sequence spread spectrums signal. A receiver converts received RF signal to baseband in-phase and quadrature that are in turn converted to digitized signals. A demodulator produces chip data that is despread using a matched filter.

Abstract: A typical integrated circuit device may include a central processing unit (CPU), trap and patch (T&P) logic circuits and registers. Volatile RAM and read only memory (ROM) are also provided. A predetermined number of memory locations in the RAM are allocated for defective memory cell replacement. When power is turned on or the system is reset, the CPU executes a program stored in ROM which identifies defective RAM locations on the fly and loads the trap and path circuits and registers with the defective addresses and the replacement or patch RAM locations (addresses). When the CPU reads or writes to the bad RAM locations, the T&P logic inserts the patch address of the good RAM memory location for the reading and writing operations. In this manner, virtual defective RAM replacement is transparent to the CPU.

Abstract: a communication device that includes a base. The base includes a line interface for receiving incoming communications over a network line and sending outgoing communications over the network line, a communication transceiver for interfacing the communication device over a communication link to other communication devices in a same in-home network and for interfacing other communication devices in the same in-home network to the line interface via the communication link, and a storage medium for storing communication software that allows the communication device to communicate with other communication devices through the transceiver. The communication device also includes a processor coupled to the storage medium and to the line interface. The processor is configured to run the communication software and to receive incoming communications through the line interface and to send an outgoing communications through the line interface. The communication transceiver can be a RF short range transceiver.

Abstract: A wireless transceiver comprises a digital to analog converter having an input for receiving a digital representation of a direct sequence spread spectrum signal and having an analog output. A bandpass or lowpass filter has an input coupled to the analog output of the digital to analog converter and has a filtered output. An adder has a first input coupled to the filtered output and a second input coupled to a loop control voltage generated by a phase lock loop. The adder produces a summed output. A VCO integrated into the phase lock loop has a control input coupled to the summed output. An RF output of the VCO produces a continuous phase frequency shift keyed spread spectrum signal in response to the digital representation of the direct sequence spread spectrums signal.

Abstract: A communications device configured to receive FSK-encoded CLASS caller ID information is also configured to exchange FSK-encoded data with a peer device over a channel previously established between the two devices. In one embodiment, the channel is a voice channel previously established between the two devices.

Abstract: A communications device configured to receive FSK-encoded CLASS caller ID information is also configured to exchange FSK-encoded data with a peer device over a channel previously established between the two devices. In one embodiment, the channel is a voice channel previously established between the two devices.

Abstract: A method and apparatus for estimating signal quality in a direct sequence spread spectrum communication system such as a digital cordless telephone. The method and apparatus beneficially uses data that already available from a window-tracking function used to maintain a demodulation window around the correlation data coming from the system's matched filters. The window-tracking function outputs an in-window peak value and out-window peak value for each bit interval. The signal quality is rapidly and effectively estimated by accumulating the difference between the in-window peak correlation value and the out-window peak correlation value over a period time, preferably for one frame.

Abstract: A power management system for a mobile unit wherein the base station detects the quality of the signals transmitted by the mobile unit. Based on this signal quality, the base station determines if the mobile unit should increase the transmission power level. If an increase in transmission power is indicated, the base station sends a signal to the mobile unit to cause the mobile unit to increase transmission power. However, to save battery power, the mobile unit only transmits at the increased power level for a limited amount of time, and then automatically returns to transmitting at the lower power level. Further, a slightly decreased high power level is established to allow the mobile unit to function when it is located away from the base station, yet not near the outer transmission boundary.

Abstract: A frequency acquisition and compensation device and method for direct sequence spread spectrum communications systems has an identification (ID) sequence in an acquisition frame which is received by a receiving station and an ID sequence stored in an ID register. A received acquisition frame is demodulated using dot product and cross product demodulation. An ID detector detects the ID sequence in the demodulated dot product, cross product, or inverse cross product acquisition frame. When the ID is detected by the dot product demodulator, the receive frame timing is adjusted to coincide with a time interval when the ID was detected. Also, when the ID sequence stored in the ID register matches either the dot product, cross product or inverted cross product of the received ID sequence, the system microcontroller updates the automatic frequency control value.

Abstract: A digital subscriber line (DSL) communication system that utilizes the high frequency band of a standard telephone line does not require the use of a plain old telephone service (POTS) splitter in the resident's home, which provided isolation between the POTS frequency band (0 to 4 kHz) and the DSL frequency band. Digital signal processing techniques are utilized to adapt to varying subscriber line conditions due to POTS telephone equipment. The digital signal processing techniques eliminate the need for a splitter by reducing susceptibility to distortion due to varying subscriber line characteristics. The digital subscriber line modem utilizes constant envelope modulated signals and frequency division multiplexing, where the constant envelope modulations lessens the intermodulation distortion products due to DSL signals that are transmitted by the modem and which may result in audible noise at the POTS telephone equipment due to non-linearities of the POTS telephone equipment.