Patent ID: 8475371
Filing Date: 2013-07-02
Classification: A61B,G16H,Y10T

Abstract:
1. A fitness monitoring system for monitoring physiological parameters of a subject engaged in a physical activity, comprising: a sensor subsystem including a first sensor and a second sensor, wherein the first sensor comprises a multi-layered printed circuit comprising a conductive circular coil formed from a plurality of printed circuit boards; a microcontroller; and driver circuitry configured to convert a square wave drive from the microcontroller into an efficient current drive for the coil, wherein each layer of the multi-layered printed circuit comprises a continuous turn of the coil on one of the printed circuit boards, wherein the turns of the coil are connected in series, wherein the first and second sensors are responsive to changes in a parameter, and wherein the sensor subsystem is configured to generate and transmit a signal representative of the parameter.