Sony Corporation

Sony Trans Com Inc.

Sony Transcom, Inc.

Bruce Robert Ferguson

James Bruce Whitehouse

Loi Quang Ninh

David M Stumfall

Kunjan Zaveri

Kaz Takata

Kazuo Takata

Roy Isam Ishida

A remotely-controlled cable equalization system includes a control unit containing a non-volatile memory, a plurality of remote video display devices, each of which includes an adjustable cable equalization circuit, and an interface for connecting the control unit to each of the plurality of remote video display devices. Each of the plurality of remote video display devices includes a receiver for receiving a 12-bit digital code, from the control unit, through the interface. A 12-bit register is connected to the receiver and a 12-bit digital-to-analog converter is then connected to the 12-bit register, for receiving a 12-bit digital code from the 12-bit register and for converting the digital signal to an analog signal. The adjustable cable equalization circuit in each of the plurality of remote video display devices receives the analog signal from the 12-bit digital-to-analog converter and provides the necessary cable equalization for each of the plurality of remote video display devices based on the received analog signal.

Remotely controlled cable equalization for in-flight entertainment

The present invention is a method and apparatus of providing EMI filtering through the implementation of a voltage sense circuit that is used in conjunction with a power correction circuit in an electromagnetic (EMI) filter system. The apparatus comprises a filter that receives an alternating current signal, where the filter has an input terminal and an output terminal. The apparatus also comprises a power correction circuit having a voltage reference input terminal and an output terminal. A voltage sense circuit having an input terminal is coupled to the input terminal of the filter. The voltage sense circuit has an output terminal that is coupled to the voltage input terminal.

Apparatus and method of providing EMI filtering

A power supply inrush current control circuit includes a current-limiting resistor connected in series with a first relay, a second relay connected in parallel with the current-limiting resistor and first relay, a power factor correction stage connected in series with the parallel combination of first relay and current-limiting resistor, and second relay, a holdup capacitor connected to an output of the power factor correction stage and a DC/DC converter connected to the output of the power factor correction stage. A first timer is connected to the second relay, a second timer is serially connected to the first timer and to the power factor correction stage, and a third timer is serially connected to the second timer and to the DC/DC converter. Upon energization of the power supply by an AC voltage source, the first relay is activated so as to connect the current-limiting resistor to the AC voltage source, and after a predetermined period of time, the second relay is activated by the first timer so as to short out the current-limiting resistor.

In-rush current control circuitry

The present invention is a method and apparatus for providing a power supply system having a redundant power supply switchover circuit, which maintains a remotely regulated output voltage when the power supply system switches over from the primary power supply to the secondary power supply. The power supply system comprises a secondary power supply that is connected in parallel to a primary power supply. The two power supplies are OR-connected to a load through two diodes, with the primary power supply connected to the diode via a monitor. During normal operating conditions, the primary power supply delivers most of the current because it operates in a 'remote sense' configuration which provides a voltage output that is higher, by a diode voltage drop, than that of the secondary power supply, which operates in a 'local sense' configuration. When a monitor detects the failure of the primary power supply, it generates a control signal to direct a relay switch to switch the secondary power supply from the 'local sense' configuration to the 'remote sense' configuration. As a result, the secondary power supply will deliver the full power requirements of the load. During the momentary switchover period, fluctuations in load voltage are minimal and within the range permitted by most logic devices.

Redundant power supply switchover circuit

The present invention is a method and apparatus for controlling power supply to aircraft electronic systems based on ambient environmental conditions. The apparatus comprises a monitor for detecting an environmental condition, a power supply for providing power, a circuit which receives power from the power supply, and a switch coupled to the monitor. Upon detection of the environmental condition, the switch connects the power supply to the circuit, otherwise the switch disconnects the circuit from the power supply.

Apparatus and method of providing power control based on environmental

A technique and system for isolating segments of a serial data bus for remote configuration of equipment in in-flight entertainment systems. The system allows the automatic initialization, or configuration, of multiple terminal units, attached to a serial data bus, without requiring physical access to the multiple units.

Method and apparatus for connecting several video distribution units to

A system on an aircraft that eliminates hot-swapping of circuit boards to prevent damage to the circuit board connector interfaces. The system supplies power to a circuit card only when there is an effective coupling between a circuit card connector and an opposite mating connector. A power control circuit responds to a card present signal which indicates when the circuit card connector is coupled to the opposite mating connector. A logic circuit converts the card present signal to a power supply enable signal. A main power supply receives the power supply enable signal and provides power to the circuit card only when the circuit card connector and the opposite mating connector are appropriately coupled.

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Anaheim, CA, United States of America

Bruce Robert Ferguson