Fiber-optic connected logic (FOCL)

#The present invention is an electronic circuit design method that incorporates fiber optic lines between individual logic gates for transmitting data. Using fiber optics as data transmission between logic circuits would make a simplified logic circuit construction best. Although the design of any logic circuit does not necessarily have to follow this or any suggested design the use of fiber optics for transmitting data between the logic gates is the core of this design method. What's important is the function of the desired circuit. For this reason, schematic symbols are used in electrical, electronic, and computer engineering to represent small complete circuits that have known function. As long as the design proves the truth table, that is associated with that particular logic circuit, correct then the circuit works.

#Each transistor and diode has what is called a propagation delay. This is the amount of time the transistor or diode takes to go from on to off and vice versa. Realizing this the more electronic switches used in a particular device the slower the circuit will be in performing the appropriate function. Using fiber optics to transmit data between logic gates increases the speeds and provides other benefits as well such as lower power consumption and lower possibility of faulty information being transmitted and received. This invention is primarily intended for data transmission and not for power amplification, transformation, or the increasing or decreasing of voltage.

#FIG. 1 illustrate the schematic symbol for the buffer circuit.

#FIG. 1a illustrates the truth table for the buffer circuit.

#FIG. 1b illustrates the buffer circuit using a single BJT transistor.

#The schematic symbols in FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6, and FIG. 7 are like a short hand that is used to describe know functions of certain circuits. Instead of drawing the complete circuits the industry uses these symbols to describe a particular function on a schematic.

#The truth tables in FIG. 1a, FIG. 2a, FIG. 3a, FIG. 4a, FIG. 5a, and FIG. 6a, are a mathematical description of the function of how each logic gate functions. The letters at the top of the truth table correspond to inputs and outputs on the circuits with the same labels. The numbers, 1's and O's, are a universal representation of binary communication. The 1's are logical highs and in this case represent an input or output that is equal to the power source. The 0's are logical lows and in this case represent no input or output or 0 volts.

#FIG. 1b is an illustration of a buffer circuit using a single BJT (Bipolar Junction Transistor), Q1. The photodiode, D1 is in it's photoconductive mode or reverse biased and is connected to the base of Q1. When light is applied to the fiber-optic line through input ‘A’, D1 will connect a positive voltage to the base of Q1 turning it on. Once Q1 is turned on it will connect a positive voltage to the anode of the LED, D2, forward biasing it. Once D2 is forward biased it will turn on and apply light though the fiber-optic lines through output ‘Y’. This would prove the truth table in FIG. 1a correct in that every logical high input will yield a logical high output. This design method is applicable to all types of BJT's.