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US 12,750,062 B1Granted
Simple self-disciplined oscillator
AssigneeKiomars Anvari
InventorKiomars Anvari
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Abstract
A simple, and low-cost oscillator solution that uses a self-disciplined circuit to maintain its frequency with high accuracy. The self-disciplined circuit includes a counter and a constant delay circuit. The oscillator is used to increment the counter. The constant delay circuit records the value of the counter when triggers a delay block with a trigger signal and when the trigger signal is detected at the output of the delay block. The difference between the two counter values is used to calculate a time drift and to maintain the frequency of the oscillator at the desired value.
Claims19
A simple self-adjusting oscillator (SSO) comprising:
- an adjustable oscillator;
- a control circuit;
- and
- a desired operating frequency Fo;
- said adjustable oscillator uses at least one of a voltage control oscillator (VCO), a voltage control crystal oscillator (VCXO), a voltage-controlled temperature compensated crystal oscillator (VC-TCXO), a temperature compensated crystal oscillator (TCXO), and an oven-controlled crystal oscillator (OCXO);
- said control circuit consists of a counter that is incremented by said adjustable oscillator, an adjustment circuit, and a time delay circuit with a constant delay having a value D;
- said time delay circuit sends a trigger signal to said constant delay and detects said trigger signal at the output of said constant delay;
- said time delay circuit calculates a time drift of said adjustable oscillator by subtracting said value D from a difference of said counter's value Nd when said trigger signal is detected divided by said Fo and said counter's value Nt when said trigger signal is transmitted divided by said Fo which is said value D−(Nd−Nt)/Fo;
- said time drift is used by said adjustment circuit to adjust said adjustable oscillator towards said Fo.
6 more elements
Dependencies are inferred from the claim text.