Circuit for transmitting a RFID signal

• US 7,804,404 B1
• Filed: 06/08/2010
• Issued: 09/28/2010
• Est. Priority Date: 06/08/2010
• Status: Active Grant

• Current Assignee: Callaway Golf Company
• Original Assignee: Callaway Golf Company
• Inventors: Denton, Scott, Balardeta, Joseph
• Primary Examiner(s): Wu; Daniel
• Assistant Examiner(s): OTT, FREDERICK R
• Application Number:
  US12/796,384
• Time in Patent Office: 112 Days
• Field of Search: 340/568.6, 340/539.13, 473/151
• US Class Current: 340/568.6
• CPC Class Codes: A63B 2024/0031 at the starting point
• CPC Class Codes: A63B 2024/0037 on a target surface or at impact on the ground
• CPC Class Codes: A63B 2024/0068 Comparison to target or threshold, previous performance or not real time comparison to other individuals
• CPC Class Codes: A63B 2220/40 Acceleration
• CPC Class Codes: A63B 2220/803 Motion sensors
• CPC Class Codes: A63B 2225/20 with means for remote communication, e.g. internet or the like
• CPC Class Codes: A63B 2225/54 Transponders, e.g. RFID
• CPC Class Codes: A63B 24/0021 Tracking a path or terminating locations
• CPC Class Codes: A63B 69/36 for golf
• CPC Class Codes: A63B 69/3632 Clubs or attachments on clubs, e.g. for measuring, aligning A63B69/3614 takes precedence; clubs for swinging exercises in general A63B15/00
• CPC Class Codes: A63B 71/0669 Score-keepers or score display devices

Abstract

The present invention relates to a system for transmitting a signal while conserving battery for a shot tracking device attached to a grip of a golf club. The system comprises a circuit comprising a battery, a resistor, a capacitor, a microprocessor and a radiofrequency component.

Claims

1. A circuit for conserving power for a shot tracking device attached to a grip of a golf club, the circuit comprising:

a battery having no more than 75 milliamps of capacity;

a resistor in electrical communication with the battery, wherein the resistor controls a rate at which a capacitor is charged from the battery;

the capacitor in electrical communication with the resistor, wherein the capacitor is a one micro-Farad capacitor;

a load switch in electrical communication with the capacitor, the load switch maintained in an open state until an impact transitions the load switch to a closed state;

a microprocessor in electrical communication with the load switch, wherein when the load switch is in the closed state, current drawn from the capacitor is allowed to flow to the microprocessor;

a radiofrequency component in electrical communication with the microprocessor, wherein when the load switch is in the closed state a signal is transmitted from the radiofrequency component and a confirmation signal is received at the radiofrequency component, wherein the radiofrequency component operates at 2.4 giga-Hertz, wherein a peak current of transmission of the signal which is limited to 2 milliamps;

and the load switch, with no impact, transitions to an open state, thus deactivating the microprocessor and the radiofrequency component and allowing the power to be conserved.