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US 10,771,012 B2Granted
Hybrid RC/crystal oscillator
AssigneeMicrochip Technology Incorporated
InventorJason Sachs
Life of this patent
Estimating the term…
Abstract
An oscillator includes a tunable oscillator, a phase detector circuit communicatively coupled with an output of the tunable oscillator and an input to the oscillator, and an oscillator controller circuit configured to adjust frequency of the tunable oscillator based upon phase detection between output of the tunable oscillator and output of an external resonant element received at the input to the oscillator.
Claims20
An oscillator, comprising:
- a tunable oscillator communicatively coupled with a first pin, the tunable oscillator configured to drive an output signal through the first pin to an external resonant element;
- a phase detector circuit communicatively coupled with an output of the tunable oscillator and an input to the oscillator;
- and
- an oscillator controller circuit configured to adjust frequency of the tunable oscillator based upon phase detection between output of the tunable oscillator and an output of the external resonant element received at the input to the oscillator, wherein the oscillator controller circuit is configured to use the output of the external resonant element to adjust frequency of the tunable oscillator during the entire operation of the tunable oscillator.
1 more element
A microcontroller, comprising:
- a processor;
- one or more peripheral circuits;
- and
- an oscillator, comprising:
- a tunable oscillator communicatively coupled with a first pin, the tunable oscillator configured to drive an output signal through the first pin to an external resonant element and to one or more of the peripheral circuits;
- a phase detector circuit communicatively coupled with an output of the tunable oscillator and an input to the oscillator;
- and
- an oscillator controller circuit configured to adjust frequency of the tunable oscillator based upon phase detection between output of the tunable oscillator and output of the external resonant element received at the input to the oscillator, wherein the oscillator controller circuit is configured to use the output of the external resonant element to adjust frequency of the tunable oscillator during the entire operation of the tunable oscillator.
5 more elements
The phase detector circuit is configured to receive input to the oscillator through the first pin.
A system, comprising:
- a semiconductor device, comprising a first external pin and an internal oscillator;
- and
- an external resonant element coupled to the semiconductor device at least through the first external pin;
- wherein the internal oscillator comprises:
- a tunable oscillator communicatively coupled with the first pin and configured to provide an oscillation signal to a portion of the semiconductor device;
- a phase detector circuit communicatively coupled with an output of the tunable oscillator and an input to the internal oscillator;
- and
- an oscillator controller circuit configured to adjust frequency of the tunable oscillator based upon phase detection between output of the tunable oscillator and output of the external resonant element received at the input to the internal oscillator, wherein the oscillator controller circuit is configured to use the output of the external resonant element to adjust frequency of the tunable oscillator during the entire operation of the tunable oscillator.
5 more elements
A method, comprising:
- with a tunable oscillator communicatively coupled with a first pin of an oscillator, driving an output signal through the first pin to an external resonant element;
- detecting phases with a phase detector circuit communicatively coupled with an output of the tunable oscillator and an input to the internal oscillator;
- and
- with an oscillator controller circuit, adjusting frequency of the tunable oscillator based upon phase detection between output of the tunable oscillator and output of the external resonant element received at the input to the internal oscillator, including using the output of the external resonant element to adjust frequency of the tunable oscillator md during the entire operation of the tunable oscillator.
1 more element
Dependencies are inferred from the claim text.