Multi-frequency sythesis using symmetry in arrays of coupled nonlinear oscillators

• US 7,196,590 B1
• Filed: 06/18/2004
• Issued: 03/27/2007
• Est. Priority Date: 06/18/2004
• Status: Expired due to Fees

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: In, Visarath, Kho, Yong (Andy), Palacios, Antonio, Neff, Joseph D., Longhini, Patrick, Meadows, Brian K.
• Primary Examiner(s): Pascal; Robert
• Assistant Examiner(s): GOODLEY, JAMES E
• Application Number:
  US10/874,010
• Time in Patent Office: 1,012 Days
• Field of Search: 331/2, 331/45, 331/46, 331/53
• US Class Current: 331/53
• CPC Class Codes: H03B 21/01 by beating unmodulated signals of different frequencies

Abstract

Certain spatio-temporal symmetries induce one array of a two-array coupled network of oscillators to oscillate at N times the frequency of the other array, where N is the number of oscillators in each array.

Claims

1. An apparatus comprising:

a first oscillator array including a first plurality of N nonlinear oscillators each having an oscillator input and an oscillator output and each having a summer operably coupled to provide a summed oscillator input, said first oscillator array also including a first intra coupling network to couple said oscillators so that each said oscillator output is coupled to at least one other said nonlinear oscillator in said first plurality of N nonlinear oscillators;

a second oscillator array including a second plurality of N nonlinear oscillators each having an oscillator input and an oscillator output and each having a summer operably coupled to provide a summed oscillator input, said second oscillator array also including a second intra coupling network to couple said oscillators so that each said oscillator output is coupled to at least one other said nonlinear oscillator in said second plurality of N nonlinear oscillators; and

an inter array coupling network coupling said oscillators of said first plurality of N nonlinear oscillators to said second plurality of N nonlinear oscillators so that each oscillator output of said first oscillator array is provided as an input to the respective said summer of each nonlinear oscillator of said second oscillator array and so that each oscillator output of said second oscillator array is provided as an input to the respective said summer of each nonlinear oscillator of said first oscillator array,

wherein an oscillation frequency generated in one of said arrays generates a frequency-multiplied oscillation frequency in the other of said arrays that is substantially N times said oscillation frequency of said one array.

2. The apparatus of claim 1 wherein said nonlinear oscillators are substantially identical nonlinear oscillators.

3. The apparatus of claim 1 wherein each of said nonlinear oscillators includes an over-damped Duffing oscillator.

4. The apparatus of claim 3 wherein each of said nonlinear oscillators is a substantially identical over-damped Duffing oscillator.

5. The apparatus of claim 4 wherein N is an odd number.

6. The apparatus of claim 5 wherein each intra array coupling network provides one-way signal flow between said oscillators in said array.

7. The apparatus of claim 1 wherein said nonlinear oscillators are chosen from the group of magnetic sensors, ferro-electric sensors, piezo-electric sensors, superconducting-quantum interference device sensors, gyroscope sensors, voltage-controlled oscillators and phase-locked loops.

8. An apparatus comprising:

a first oscillator array including a first plurality of N substantially identical nonlinear oscillators each having an oscillator input and an oscillator output and each having a summer operably coupled to provide a summed oscillator input, said first oscillator array also including a first intra coupling network to couple said oscillators so that each said oscillator output is coupled to at least one other said nonlinear oscillator in said first plurality of N nonlinear oscillators, said coupling including one-way signal flow between said oscillators in said first plurality of N nonlinear oscillators;

a second oscillator array including a second plurality of N substantially identical nonlinear oscillators each having an oscillator input and an oscillator output and each having a summer operably coupled to provide a summed oscillator input, said second oscillator array also including a second intra coupling network coupling said oscillators so that each said oscillator output is coupled to at least one other said nonlinear oscillator in said second plurality of N nonlinear oscillators, said coupling including one-way signal flow between said oscillators in said second plurality of N nonlinear oscillators; and

an inter array coupling network coupling said oscillators of said first plurality of N nonlinear oscillators to said second plurality of N nonlinear oscillators so that each oscillator output of said first oscillator array is provided as an input to the respective said summer of each nonlinear oscillator of said second oscillator array and so that each oscillator output of said second oscillator array is provided as an input to the respective said summer of each nonlinear oscillator of said first oscillator array,

wherein an oscillation frequency generated in one of said arrays generates a frequency-multiplied oscillation frequency in the other of said arrays that is substantially N times said oscillation frequency of said one array.

9. The apparatus of claim 8 wherein each of said nonlinear oscillators is an over-damped Duffing oscillator.

10. The apparatus of claim 9 wherein N is an odd number.

11. The apparatus of claim 8 wherein said nonlinear oscillators are chosen from the group of magnetic sensors, ferro-electric sensors, piezo-electric sensors, superconducting-quantum interference device sensors, gyroscope sensors, voltage-controlled oscillators and phase-locked loops.