Abstract: A portable system capable of receiving audio signals from one or more sources and reproducing the signals via speakers contained therein. The portable audio reproduction system can include a docking station or similar means for communicatively coupling an audio device to the portable audio reproduction system, thereby reducing desktop clutter and simplifying connecting the portable audio reproduction system with the audio device. The speakers of the portable audio reproduction system can preferably be received within a base portion of the system, thereby protecting the speakers during transport and reducing the overall size of the system for improved portability. External connections may also be provided, thereby enabling the portable audio reproduction system to receive audio signals from additional sources, and a mixer allows the system to reproduce signals from a portable audio device and an auxiliary source, such as a computer.

Abstract: The loudspeaker has a first pair of drivers arranged in a line, a center point along the line, wherein the pair of drivers are substantially centered about the center point with a center to center distance, d0, between the drivers in the first pair of drivers, whereby the maximum frequency with out high amplitude side lobes is equal to c/2d0, and at least a subsequent pair of drivers arranged in the line array with the first pair of drivers and substantially centered about the center point, wherein the subsequent pair of drivers are spaced such that the center to center distance between each driver in the subsequent pair, dn, is equal to 4nd0, where n=0 at the innermost pair of drivers and n increases by 1 with each pair of drivers sequentially added. Each pair of drivers for n>0 has a first order low pass filter with a frequency equal to 2c/dn.

Abstract: A circuit according to the present invention improves the power supply rejection ratio for a pulse width modulated digital amplifier and can be used as a compressor and/or limiter. The circuit preferably operates by using voltage level translation to vary the amplitude of a triangle wave in response to changes in power supply voltage prior to input of the wave into a comparator of the PWM device. Because the circuit operates to improve power supply rejection, little or no distortion is introduced into the signal when used as a compressor and/or limiter. Additionally, the circuit is optionally implemented in a Class D amplifier, and provides a lower cost of implementation than conventional designs in such implementations.

Abstract: A communications device for interfacing a computer to a cellular telephone which includes memory, voicemail, caller identification and a display screen includes a housing accessible to a human operator, a telephone interface attached to the housing to communicatively connect to the cellular telephone, a telephone connection to connect to a telephone line; and means for uploading the voicemail of the cellular telephone via the telephone connection and telephone interface to the memory of the cellular telephone. Attaching the cellular telephone to the telephone interface actuates the uploading of the voicemail of the cellular telephone to the memory of the cellular telephone for display in the display screen of the cellular telephone.

Abstract: A computer system with a remote television display converts output signals from a computer to video signals to be displayed on at least one television set and transmits the output signals from the computer along with broadcast and cable video signals to the at least one television set so that one or more televisions may be used as remote display devices.

Abstract: Home entertainment center interface apparatus providing remote database access and access coordination is disclosed. The interface can, alternatively, be installed directly on the PCI bus in the computer. The interface provides remote access to the database in response to signals from an RF remote control transmitter. The transmitter can be added as a plug-compatible unit to upgrade an existing video control device. A supplemental chat window is generated by a further plug-compatible upgrade unit in response to address and command signals modulating a dedicated carrier frequency on the cable.