Digital to analog converter for fiber optic gyroscope

1. A digital to analog converter for fiber optic gyroscope, comprising:

a random unit generating a random number signal;

a plurality of encoding units coupled with the random unit, wherein each of the plurality of encoding units receives the random number signal and a plurality of digital signals, and each of the plurality of encoding units converts the plurality of digital signals to a plurality of spin signals according to the random number signal;

a plurality of control units respectively one to one coupled with the plurality of encoding units, wherein each of the plurality of control units receives the plurality of spin signals, and converts the plurality of spin signals to a plurality of logic signals through a clock signal;

a current source array for generating a total current and formed by a plurality of sub-arrays, wherein each of the sub-arrays coupled with a respective one of the plurality of control units; and

an output load electrically connected to the current source array, wherein the total current passes through the output load and forms an analog voltage signal at both ends of the output load;

wherein each of the plurality of sub-arrays, a respective one of the plurality of encoding units, and a respective one of the plurality of control units forms an independent circuit branch; and

wherein the independent circuit branches are connected in parallel, each of the independent circuit branches generates a sub-current according to a respective one of the plurality of logic signals, and the total current is a sum of the sub-currents.

2. The digital to analog converter for fiber optic gyroscope as claimed in claim 1 , wherein the random unit is a true random number generator composed of a linear track and hold circuit and a nonlinear discrimination circuit.

3. The digital to analog converter for fiber optic gyroscope as claimed in claim 1 , wherein each of the plurality of encoding units receives the random number signal by a selection portion and generates a random sequence for a switching portion, and the switching portion receives the plurality of digital signals.

4. The digital to analog converter for fiber optic gyroscope as claimed in claim 3 , wherein the selection portion is a pseudo random number generator and the switching portion is a rotator.

5. The digital to analog converter for fiber optic gyroscope as claimed in claim 1 , wherein each of the plurality of control units has a plurality of logic gates, the plurality of spin signals is respectively input to the plurality of logic gates, the clock signal controls each of the plurality of logic gates, and the plurality of logic signals is generated through each of the plurality of logic gates.

6. The digital to analog converter for fiber optic gyroscope as claimed in claim 1 , wherein the current source array has a plurality of drive switches and a plurality of current loops, and wherein the plurality of drive switches is coupled with the plurality of control units, the plurality of current loops is respectively one to one electrically connected to the plurality of drive switches, and the plurality of current loops is connected in parallel and all output currents are collected as the total current.

7. The digital to analog converter for fiber optic gyroscope as claimed in claim 6 , wherein each of the plurality of control units is coupled with the plurality of drive switches, and each of the sub-arrays is formed by the plurality of current loops corresponding to the plurality of drive switches.