Optical data link system, and methods of constructing and utilizing same
First Claim
Patent Images
1. Apparatus for high speed communication of data, comprising, in combination:
- (a) oscillator means for producing a synchronization clock signal;
(b) timing and control means connected to and receiving clock signals from the oscillator means for producing timing and control signals, and including divider circuit first means for producing simultaneous transmitting and receiving timing and control signals;
(c) synchronization means connected to the timing and control means for synchronizing the same to the clock signal of the oscillator means;
said divider change circuit means includes a second transmitter circuit means for producing two frequency shift key time base carrier frequency representing respectively a high and low input data signal;
said timing and control means further includes a second receiver circuit means, with each first and second transmitter circuit means and said first and second receiver circuit means including at least one counter;
wherein said synchronization means includes edge detector means connected to said at least one counter of the timing and control means for receiving data signal and clearing said at least one counter on detection of transitions of the data received between high and low states;
wherein said oscillator means includes a 24 Megahertz front-end oscillator;
at least one light-emitting diode means connected to the transmitter circuit for transmitting light;
at least one photosensor means connected to the receiver circuit for receiver circuit for receiving light;
said diode means and photosensor means being arranged adjacent one another and directed substantially in a common direction.
0 Assignments
0 Petitions
Accused Products
Abstract
A high-speed two-way optical data link has both light-emitting and light-sensing units mounted adjacent one another in a single housing together with a timing and control unit providing all signals necessary for simultaneous transmissions and reception of data. Synchronization to a clock signal is achieved by use of edge detectors which reset to zero counters in the timing and control unit whenever a transition in data pulses is sensed. A pair of computers are linked using a program called "Crosstalk" which performs full parity checking of all data received by an associated computer. Both computers are live handshaking and asynchronous at all times.
134 Citations
16 Claims
-
1. Apparatus for high speed communication of data, comprising, in combination:
-
(a) oscillator means for producing a synchronization clock signal; (b) timing and control means connected to and receiving clock signals from the oscillator means for producing timing and control signals, and including divider circuit first means for producing simultaneous transmitting and receiving timing and control signals; (c) synchronization means connected to the timing and control means for synchronizing the same to the clock signal of the oscillator means; said divider change circuit means includes a second transmitter circuit means for producing two frequency shift key time base carrier frequency representing respectively a high and low input data signal; said timing and control means further includes a second receiver circuit means, with each first and second transmitter circuit means and said first and second receiver circuit means including at least one counter; wherein said synchronization means includes edge detector means connected to said at least one counter of the timing and control means for receiving data signal and clearing said at least one counter on detection of transitions of the data received between high and low states; wherein said oscillator means includes a 24 Megahertz front-end oscillator; at least one light-emitting diode means connected to the transmitter circuit for transmitting light; at least one photosensor means connected to the receiver circuit for receiver circuit for receiving light; said diode means and photosensor means being arranged adjacent one another and directed substantially in a common direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. Apparatus for the simultaneous and independent transmission and reception of signals over an optical data link, comprising in combination;
-
(a) a housing; (b) light-sensing means arranged on said housing for receiving light from a source spaced in a given direction from said housing; and (c) light-emitting means arranged on said housing adjacent said light-sensing means for directing light substantially in the same given direction as the light-sensing means receives light, said light-sensing means being arranged shielded from light from said light-emitting means; said light-sensing means includes a parabolic reflector mounted on said housing and forming a concave surface defining a focal point, and a photodetector disposed at said focal point of said reflector. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
Specification