Synchronized voltage controlled oscillator lap counting circuit

Details Synchronized voltage controlled oscillator lap counting circuit Synchronized voltage controlled oscillator lap counting circuit

1997-08-15

1998-12-01

Wambach, Margaret Rose

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Measuring or testing

377 5, 377 17, 324247, 324251, H03K 2300

Patent

active

058449604

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.

REFERENCES:
patent: 3905121 (1975-09-01), Takeda et al.
patent: 4482255 (1984-11-01), Gygax et al.
patent: 4530105 (1985-07-01), Rabinowitz
patent: 4991126 (1991-02-01), Reiter
patent: 5241270 (1993-08-01), Ng
patent: 5500585 (1996-03-01), Aab
patent: 5661398 (1997-08-01), Sham et al.

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