Clock for recording devices
AssigneeSound Devices LLC
InventorsMatt Anderson, Francois Morin
Life of this patent
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Abstract
A method includes receiving, by a recording device, an indication of an initializing time and receiving, by the recording device, an indication of a timing pace. The method also includes maintaining, by the recording device, an updated current time based on the initializing time and the timing pace and sensing, via a sensor of the recording device, a condition. The method further includes storing, in memory of the recording device, an indication of the condition and an associated indication of the updated current time. The indication of the updated current time corresponds to when the condition was sensed by the sensor.
Claims15
A recording device comprising:
- a sensor that senses a condition;
- memory that stores an indication of the condition and an indication of when the condition was sensed by the sensor;
- a timing circuit that receives an indication of an initializing time from a time keeping device;
- receives an indication of a timing pace;
- and maintains an updated current time based on the initializing time and the timing pace, wherein the timing circuit uses a phase-locked loop to maintain the updated current time via a reference oscillating signal regulated by a pulse-width modulator of the recording device during a time when the timekeeping device is not communicatively coupled to the recording device, wherein the pulse-width modulator regulates the reference oscillating signal based on a duty factor of an output signal of the pulse-width modulator, and wherein the pulse-width modulator determines the duty factor based on a value stored in a memory register;
- and
- a processor communicatively coupled to the sensor, the memory, and the timing circuit, wherein the processor receives from the sensor the indication of the condition;
- receives from the timing circuit an indication of the updated current time, wherein the indication of the updated current time corresponds to when the condition was sensed by the sensor;
- and causes the memory to store the indication of the condition and the indication of when the condition was sensed by the sensor.
A method comprising:
- receiving, by a recording device, an indication of an initializing time from a timekeeping device;
- receiving, by the recording device, an indication of a timing pace;
- regulating a reference oscillating signal via a pulse-width modulator of the recording device during a time when the timekeeping device is not communicatively coupled to the recording device, wherein said regulating the reference signal comprises determining a value stored in a memory register and altering a duty factor of a signal output from the pulse-width modulator based on the value stored in the memory register;
- maintaining, by the recording device, an updated current time based on the initializing time, the timing pace and the regulated reference oscillating signal;
- sensing, via a sensor of the recording device, a condition;
- and
- storing, in memory of the recording device, an indication of the condition and an associated indication of the updated current time, wherein the indication of the updated current time corresponds to when the condition was sensed by the sensor.
Dependencies are inferred from the claim text.