Methods and apparatus for improving remote nfc device detection using a low power oscillator circuit
AssigneeQUALCOMM Incorporated
InventorsAnssi Kaleva Haverinen, Todd Reynolds, Angelica Wong, Roger Brockenbrough, Sang-Min Lee
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Abstract
A method, an apparatus, and a computer program product for inductive communication are provided in connection with providing mechanisms for detecting a remote NFC device without excessive power consumption. In one example, a communications device is equipped to monitor frequency oscillations associated with a NFC antenna using a calibrated LPO, determine that a number of occurrences of the frequency oscillations from a reference frequency is greater than a frequency deviation threshold, and perform a NFC polling procedure in response to the determination.
Claims40
A method of inductive communications, comprising:
- monitoring frequency oscillations associated with a near field communication (NFC) antenna using a calibrated low power oscillator (LPO);
- determining that a number of occurrences of the frequency oscillations from a reference frequency is greater than a frequency deviation threshold;
- and
- performing a NFC polling procedure in response to the determination.
An apparatus for inductive communications, comprising:
- means for monitoring frequency oscillations associated with a near field communication (NFC) antenna using a calibrated low power oscillator (LPO);
- means for determining that a number of occurrences of the frequency oscillations from a reference frequency is greater than a frequency deviation threshold;
- and
- means for performing a NFC polling procedure in response to the determination.
A computer program product, comprising:
- a computer-readable medium comprising code for:
- monitoring frequency oscillations associated with a near field communication (NFC) antenna using a calibrated low power oscillator (LPO);
- determining that a number of occurrences of the frequency oscillations from a reference frequency is greater than a frequency deviation threshold;
- and
- performing a NFC polling procedure in response to the determination.
An apparatus for inductive communications, comprising:
- a near field communication (NFC) antenna and matching network;
- a calibrated low power oscillator (LPO) circuit coupled to the NFC antenna and matching network and configured to monitor frequency oscillations;
- and
- a processing system coupled to at least one or the LPO circuit or the NFC antenna and matching network and configured to:
- determine that a number of occurrences of the frequency oscillations from a reference frequency is greater than a frequency deviation threshold;
- and
- perform a NFC polling procedure in response to the determination.
Dependencies are inferred from the claim text.