Motorola Corporation

General Instrument Corportion

Christopher R Bach

Patrick D Smith

Phillip Kent Freyman

Michael Beruscha

Michael Patrick Ryan

Michael E Nowak

Song Zhang

Yishu Shi

A power supply is configured to accept battery and external power sources, and is adapted for use in equipment in a broadband communications network. A first voltage detector detects a first voltage signal at an electrical path associated with the battery power source and a second voltage detector detects a second voltage signal at an electrical path associated with the external power source. A processor is responsive to the first and second voltage detectors and adapted to generate an electrical signal indicating whether the battery power source is present, charged and being used. A light emitting diode, responsive to the processor, displays, in an order of priority, whether the battery power source is present, charged or being used.

Power supply, and apparatus and method for operating a power supply

A programmable access point () has a line driver (), sensors (), comparator and control logic (), a power supply (), and a backup power supply (). The line driver () provides power and communications signals to attached customer equipment and receives its power from either the power supply () or the backup power supply (). The power supplies () generate power supply status signals which include a signal indicating whether line driver () is receiving power from the power supply () or the backup power supply () and a signal indicating the reserve capacity of the backup power supply (). The sensors () monitor the power output by the line driver (). The comparator and control logic () receives the power supply status signals and the monitored power output values and generates a control value for line driver () which it provides to the line driver () which modifies its output responsive to the control value.

Least mean power consumption in telecommunications systems

A first mixer (306) shifts a first end (208) of a desired signal frequency bandwidth (206) of a desired signal (202) to an edge (508) of a first filter frequency bandwidth (502) of a first filter (312), wherein the first filter frequency bandwidth (502) is greater than the desired signal frequency bandwidth (206). Signals within a first undesired frequency spectrum (504) are attenuated by the first filter (314). A second mixer (316) shifts a second end (210) of the desired signal frequency bandwidth (206) to an edge (608) of a second filter frequency bandwidth (602) of a second filter (320) to receive the desired signal (202).

Method and apparatus for receiving a plurality of signals having

An improved display bias arrangement is provided using a DC filament voltage in conjunction with stepped grid voltages to maintain even illumination. In a VF display there is a directly heated cathode (filament), an anode and a grid. If a DC filament voltage is used, one end of the cathode will be at different potential than the other, thus resulting in a variation in anode-to-cathode potential across the display. This varying potential causes electrons to hit the anode with varying speed, causing a variation in display intensity. In this invention, the cathode (filament) is supplied with a DC voltage and the grid of each segment is supplied with a different voltage, thereby equalizing the anode-to-cathode potential for each display digit. In a first embodiment, resistor networks are used to equalize the anode-to-cathode voltages. In a second embodiment, diode networks are used to equalize the anode-to-cathode voltages.

Display bias arrangement

Disclosed is a coupling arrangement which comprises an enclosed cavity with an aperture in one of its walls. An adjustable probe is positioned within the aperture to allow energy within the cavity to be coupled onto the probe. A microstripline transition is connected at one end to the adjustable probe and at the other end to external circuitry. The arrangement allows variable coupling of energy within the cavity onto the probe without requiring cumbersome procedures for fine adjustment.

Growing community of inventors

Elgin, IL, United States of America

Christopher R Bach