Patent ID: 7516339

Claim:
A power-conserving electrical circuit comprising: an electrical power source comprising a first power input, a voltage regulator circuit comprising a voltage regulator input, a voltage regulator output and a voltage regulator enable input, a real time clock circuit comprising a real time clock power input, a real time clock interface I/O and a real time clock enable output, a main device having a main device voltage requirement and comprising a main device power input in electrical connection with said voltage regulator output, and further comprising a main device interface I/O in electrical connection with said real time clock circuit I/O, a switch circuit comprising a first switch input in electrical connection with said first power input and a second switch input in electrical connection with said voltage regulator output, a switch output, and a switch control input for the selective routing of said first power input or said voltage regulator output to said switch output, said switch output in electrical connection with said real time clock circuit power input, and, said real time clock circuit enable output in electrical connection with said switch control input and said voltage regulator enable input.