Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1992-11-23
1996-02-27
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359152, 359135, H04B 1006, H04B 1408
Patent
active
054953588
ABSTRACT:
An IR transceiver for use in low-power, low cost environments such as portable computers and hand-held calculators. The transceiver can transmit data at higher, selectable baud rates and at greater distances than previously possible. On the transmitting side the transceiver elements include a serial interface device, encoder circuitry and an IR transmitter with LEDS having fast turn-on and turn-off times. On the receiving side are decoder circuitry coupled to the serial interface device and an IR receiver designed specifically for a photo diode. A baud rate generator provided by the serial interface device sets the baud rate in the encoding and decoding circuitry. The receiver portion of the IR transceiver automatically sets itself to the baud rate of received data. Because of the baud rate selectability, the IR transceiver is compatible with prior IR transceivers that are limited to fixed baud rates.
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HP95LX Wired Serial and Infrared I/O External Reference Specification by Kevin W. Bartig, Hewlett-Packard, Apr. 11, 1991.
Bartig Kevin W.
Crawford Richard D.
Hewlett--Packard Company
Pascal Leslie
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