Koninklijke Philips Corporation N.V.

Acoustic Technologies, Inc.

Judy Mae Fong

Scott E Harrow

Harold Downey

Donald Kesner

The amplitudes of a signal on the microphone input of a telephone and a signal on the line input of the telephone are compared with each other and with two thresholds. The comparisons are sampled and the samples control an up-down counter. The count in the counter is compared with two thresholds and the results of the comparisons are used to control at least two accumulators. A first accumulator counts consecutive comparisons having the same result and a second accumulator counts up or down in accordance with the comparisons. The counts in the first and second accumulators are logically analyzed to determine whether to receive or transmit. A plurality of samples defines a window, at the end of which the up-down counter is reset. The accumulators store data from a plurality of windows.

Transmit/receive arbitrator

This invention provides joystick interfaces and methods of providing position information of a joystick. According to one aspect, the invention provides a joystick interface for use with a joystick, the joystick interface being configured to selectively operate in one of a digital mode and an analog mode, the joystick interface including an interconnect adapted to couple with a host system; a timing circuit adapted to couple with a joystick having a lever and configured to output a timing signal having a timing characteristic which is dependent upon the position of the joystick lever; and logic circuitry coupled with the interconnect and the timing circuit and configured to initiate a timing operation within the timing circuit to generate the timing signal and output an indication signal responsive to the timing signal during operation in an analog mode of operation, the logic circuitry being further configured to generate and output a digital value to the interconnect responsive to the timing signal and during operation in a digital mode.

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Chandler, AZ, United States of America

Judy Mae Fong