# US 11,116,065 B2 · Ground leakage current power supply > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,116,065 B2 - Document ID: US11116065B2 - Status: Granted - Kind: B2 - Application number: 16/881,950 - Filed: 2020-05-22 - Published: 2020-11-26 - Granted: 2021-09-07 - Earliest claimed: 2019-05-23 - Assignees: Fabriq, Ltd. - Applicants: Fabriq, Ltd - Inventors: Jeffrey G. Reh; Matthew B. O'Kelley - Web page: https://patentgrep.com/patent/US11116065B2 ## CPC - G05B 15/02: electric - H05B 45/30: Driver circuits - H05B 45/357: specially adapted for retrofit LED light sources - H05B 47/14: by determining electrical parameters of the light source - H05B 47/185: via power line carrier transmission - H05B 47/18: via data-bus transmission - H05B 47/19: via wireless transmission - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract A ground leakage current power supply is provided that includes a hot node coupled to a hot wire of an AC power source, and an earth ground node coupled to an earth ground, where a neutral wire is not present. The supply also has an energy storage component and a low voltage power supply. The energy storage component is coupled in series to a current limiter that is coupled to receive rectified power from the AC power source, where the current limiter enables the energy storage component to charge to a voltage value at a rate that limits ground leakage current. The low voltage power supply includes a linear voltage regulator and is coupled to the energy storage component and to a return node, the return node providing a return reference voltage, and is configured to receive the voltage value, and is configured generate a regulated output voltage that is referenced to the return reference voltage. ## Claims ### Claim 1 A ground leakage current power supply, comprising: a hot node that is coupled to a hot wire of an AC power source, and an earth ground node that is coupled to an earth ground, wherein a neutral wire of said AC power source is not present; an energy storage component, coupled to a return node and coupled in series to a current limiter that is coupled to receive rectified power from said AC power source, wherein said current limiter enables said energy storage component to charge to a voltage value at a rate that limits ground leakage current to a prescribed leakage value; and a low voltage power supply comprising a linear voltage regulator, coupled to said energy storage component and to a return node, said return node providing a return reference voltage, and configured to receive said voltage value, and configured generate a regulated output voltage that is referenced to said return reference voltage. ### Claim 2 (depends on 1) The ground leakage current power supply as recited in claim 1, wherein said energy storage component comprises a capacitor. ### Claim 3 (depends on 2) The ground leakage current power supply as recited in claim 2, wherein said prescribed leakage value comprises 5 milliamperes. ### Claim 4 (depends on 2) The ground leakage current power supply as recited in claim 2, wherein said prescribed leakage value comprises 3 milliamperes. ### Claim 5 (depends on 4) The ground leakage current power supply as recited in claim 4, wherein said regulated output voltage comprises a value of approximately 3.3 volts DC. ### Claim 6 (depends on 5) The ground leakage current power supply as recited in claim 5, wherein said capacitor comprises a 0.47 farad capacitor, and wherein said low voltage power supply is configured to supply a 25 milliampere current to a load for at least 1 millisecond. ### Claim 7 (depends on 5) The ground leakage current power supply as recited in claim 5, wherein said low voltage power supply is configured to supply a 6 milliampere current to a load for at least 47 seconds. ### Claim 8 A ground leakage current power supply, comprising: a hot node that is coupled to a hot wire of an AC power source, and an earth ground node that is coupled to an earth ground, wherein a neutral wire of said AC power source is not present; a rectifier, coupled to said hot node and to said earth ground node; an energy storage component, coupled to a return node and coupled in series to a current limiter that is coupled to receive rectified power from said rectifier, wherein said current limiter enables said energy storage component to charge to a voltage value at a rate that limits ground leakage current to a prescribed leakage value; and a low voltage power supply comprising a linear voltage regulator, coupled to said energy storage component and to a return node, said return node providing a return reference voltage, and configured to receive said voltage value, and configured generate a regulated output voltage that is referenced to said return reference voltage. ### Claim 9 (depends on 8) The ground leakage current power supply as recited in claim 8, wherein said energy storage component comprises a capacitor. ### Claim 10 (depends on 9) The ground leakage current power supply as recited in claim 9, wherein said prescribed leakage value comprises 5 milliamperes. ### Claim 11 (depends on 9) The ground leakage current power supply as recited in claim 9, wherein said prescribed leakage value comprises 3 milliamperes. ### Claim 12 (depends on 11) The ground leakage current power supply as recited in claim 11, wherein said regulated output voltage comprises a value of approximately 3.3 volts DC. ### Claim 13 (depends on 12) The ground leakage current power supply as recited in claim 12, wherein said capacitor comprises a 0.47 farad capacitor, and wherein said low voltage power supply is configured to supply a 25 milliampere current to a load for at least 1 millisecond. ### Claim 14 (depends on 12) The ground leakage current power supply as recited in claim 12, wherein said low voltage power supply is configured to supply a 6 milliampere current to a load for at least 47 seconds. ### Claim 15 A ground leakage current power supply, comprising: a hot node that is coupled to a hot wire of an AC power source, and an earth ground node that is coupled to an earth ground, wherein a neutral wire of said AC power source is not present; a rectifier, coupled to said hot node, said earth ground node, and a return node; an energy storage component, coupled to said return node and coupled in series to a current limiter that is coupled to receive rectified power from said rectifier, wherein said current limiter enables said energy storage component to charge to a voltage value at a rate that limits ground leakage current to a prescribed leakage value; and a low voltage power supply comprising a linear voltage regulator, coupled to said energy storage component and to a return node, said return node providing a return reference voltage, and configured to receive said voltage value, and configured generate a regulated output voltage that is referenced to said return reference voltage. ### Claim 16 (depends on 15) The ground leakage current power supply as recited in claim 15, wherein said energy storage component comprises a capacitor. ### Claim 17 (depends on 16) The ground leakage current power supply as recited in claim 16, wherein said prescribed leakage value comprises 3 milliamperes. ### Claim 18 (depends on 17) The ground leakage current power supply as recited in claim 17, wherein said regulated output voltage comprises a value of approximately 3.3 volts DC. ### Claim 19 (depends on 18) The ground leakage current power supply as recited in claim 18, wherein said capacitor comprises a 0.47 farad capacitor, and wherein said low voltage power supply is configured to supply a 25 milliampere current to a load for at least 1 millisecond. ### Claim 20 (depends on 18) The ground leakage current power supply as recited in claim 18, wherein said low voltage power supply is configured to supply a 6 milliampere current to a load for at least 47 seconds.