Method and system for spread spectrum gating

1. A gating module for gating an image intensifier tube, the gating module comprising:

a frequency generator generating a base signal having a base frequency;

a modulator for spread-spectrum modulating said base frequency of said signal to generate a modulated signal; and

a gating circuit coupled to said modulator, said gating circuit generating a gating signal response to said modulated signal;

wherein said gating circuit is a one-shot.

2. A system for viewing an object under low light conditions, the system comprising:

an image intensifier tube generating an image of said object;

a power supply providing power to said image intensifier tube;

a gating module coupled to said power supply, said gating module generating a spread-spectrum modulated gating signal to said power supply to provide gated power to said image intensifier tube;

wherein said gating module includes:

a frequency generator generating a base signal having a base frequency;

a modulator for spread-spectrum modulating said base frequency of said base signal to generate a modulated signal; and

a gating circuit coupled to said modulator, said gating circuit generating said gating signal in response to said modulated signal.

3. The system of claim 2 wherein:

said image intensifier tube includes a sensor, a microchannel plate and an anode.

4. The system of claim 3 wherein:

said sensor is a photocathode sensor.

5. The system of claim 2 wherein:

said frequency generator and said modulator are implemented by an oscillator.

6. The system of claim 5 wherein:

said oscillator includes a first resistor establishing said base frequency.

7. The system of claim 6 wherein:

said oscillator Includes a second resistor coupled to a modulation pin of said oscillator, said second resistor establishing a percent of modulation of said base frequency.

8. The system of claim 7 wherein;

said oscillator includes a switch connecting said modulation input to ground, closure of said switch deactivating said modulating said base frequency.

9. The system of claim 5 wherein:

said oscillator is a band-limited random noise generator.

10. The gating module of claim 2 wherein:

said modulator is a pseudorandom sequence generator.

11. The system of claim 2 wherein:

said gating circuit is a one-shot.

12. A method for gating an image intensifier tube, the method comprising:

generating a base signal having a base frequency;

spread-spectrum modulating said base frequency of said base signal to generate a modulated signal;

generating a gating signal in response to said modulated signal; and

applying said gating signal to said image intensifier tube.