Synchronized voltage controlled oscillator lap counting circuit
First Claim
1. A bearing resolving circuit, comprising:
- a Hall-effect sensor element providing differential voltage output signals in response to an external magnetic field;
a differential amplifier receiving said differential voltage output signals and providing a single amplified output signal;
a voltage controlled oscillator receiving said single amplified output signal and providing a voltage controlled oscillator output signal;
a pedometer providing a repetitive pulsed-output signal in accordance with movements of a user;
a micro-controller receiving said repetitive pulsed-output signal from said pedometer and said voltage controlled output signal from said voltage controlled oscillator;
wherein said micro-controller samples said voltage controlled output signal in synchronization with the repetitive pulsed signal output from the pedometer to resolve bearing directions based on frequencies of the voltage controlled output signal.
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Accused Products
Abstract
A synchronized voltage controlled oscillator lap counting circuit includes a bearing resolver circuit having a single Hall-effect sensor element which provides differential voltage output signals in response to an external magnetic field. The differential amplifier receives the differential voltage output signals and provides a single amplified output signal. The single amplified output signal is provided to a voltage controlled oscillator. A pedometer provides a repetitive pulsed-output signal in accordance with movements of a user. The repetitive pulsed-output signal and a voltage controlled oscillator output signal are provided to a micro-controller. The micro-controller samples the voltage controlled output signal in synchronization with the repetitive pulsed signal output from the pedometer to resolve bearing directions based on intercepted frequencies of the voltage controlled output signal.
16 Citations
11 Claims
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1. A bearing resolving circuit, comprising:
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a Hall-effect sensor element providing differential voltage output signals in response to an external magnetic field; a differential amplifier receiving said differential voltage output signals and providing a single amplified output signal; a voltage controlled oscillator receiving said single amplified output signal and providing a voltage controlled oscillator output signal; a pedometer providing a repetitive pulsed-output signal in accordance with movements of a user; a micro-controller receiving said repetitive pulsed-output signal from said pedometer and said voltage controlled output signal from said voltage controlled oscillator; wherein said micro-controller samples said voltage controlled output signal in synchronization with the repetitive pulsed signal output from the pedometer to resolve bearing directions based on frequencies of the voltage controlled output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A lap counting circuit, comprising:
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a bearing resolver circuit including; a Hall-effect sensor element providing differential voltage output signals in response to an external magnetic field; a differential amplifier receiving said differential voltage output signals and providing a single amplified output signal; a voltage controlled oscillator receiving said single amplified output signal and providing a voltage controlled oscillator output signal; a pedometer providing a repetitive pulsed-output signal in accordance with movements of a user; a micro-controller receiving said repetitive pulsed-output signal from said pedometer and said voltage controlled output signal from said voltage controlled oscillator; wherein said micro-controller samples said voltage controlled output signal in synchronization with the repetitive pulsed signal output from the pedometer to resolve bearing directions based on frequencies of the voltage controlled output signal; and wherein said micro-controller tracks the bearing direction to determine when a lap is completed. - View Dependent Claims (10, 11)
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Specification