Method and system for modulating frequency in a night vision system power system
AssigneeITT Manufacturing Enterprises, Inc.
InventorsPaul Neil Marshall, Craig Boucher
Life of this patent
Estimating the term…
Abstract
A night vision system including a power system having a low voltage unit coupled to a high voltage unit. The low voltage unit includes a low voltage controller and a low voltage table correlating pulse widths to step values. The low voltage unit transmits the step value to the high voltage unit in a pulse train having a period corresponding to a frequency. The high voltage unit including an opto-isolator for receiving the step value from the low voltage controller, a high voltage controller accessing a high voltage table correlating step value to pulse width and threshold. The high voltage controller generates control pulses at the frequency in response to the pulse width and the threshold.
Claims15
A night vision system comprising:
- a power system having a low voltage unit coupled to a high voltage unit;
- the low voltage unit including a low voltage controller and a low voltage table correlating a plurality of pulse widths to a plurality of step values;
- the low voltage unit transmitting the step value to the high voltage unit in a pulse train having a period corresponding to a frequency;
- the high voltage unit receiving the step value from the low voltage controller, a high voltage controller accessing a high voltage table correlating step value to pulse width and threshold, the high voltage controller generating control pulses at the frequency in response to the pulse width and the threshold.
A night vision system comprising:
- a power system having a low voltage unit coupled to a high voltage unit;
- the low voltage unit including a low voltage controller and a low voltage table correlating pulse widths to step values;
- the low voltage unit transmitting the step value to the high voltage unit in a pulse train having a period corresponding to a frequency;
- the high voltage unit receiving the step value from the low voltage controller, a high voltage controller accessing a high voltage table correlating step value to pulse width and threshold, the high voltage controller generating control pulses at the frequency in response to the pulse width and the threshold,
- wherein the step value is represented using at least 9 bits.
A method for controlling a night vision system, the method comprising:
- in a low voltage unit, obtaining a desired frequency and pulse width for a control pulse and accessing a low voltage table correlating a plurality of pulse widths to a plurality of step values to obtain a step value in response to the pulse width;
- transmitting the step value to a high voltage unit in a pulse train having a period corresponding to the frequency;
- in the high voltage unit, receiving the step value, accessing a high voltage table correlating step value to pulse width and threshold, and generating control pulses at the frequency in response to the pulse width and the threshold.
A method of controlling a night vision system, the method comprising:
- in a low voltage unit, obtaining a desired frequency and pulse width for a control pulse and accessing a low voltage table to obtain a step value in response to the pulse width;
- transmitting the step value to a high voltage unit in a pulse train having a period corresponding to the frequency;
- in the high voltage unit, receiving the step value, accessing a high voltage table correlating step value to pulse width and threshold and generating control pulses at the frequency in response to the pulse width and the threshold;
- wherein the step value is represented using at least 9 bits.
Dependencies are inferred from the claim text.