Device for reducing power consumption in medical equipment which is implantable in the human body

A device for reducing power consumption in medical electrical equipment implantable in the human body, said device comprising:

• sensor means, including a sensor element connected to sensor electronic circuitry, for sensing a parameter for use in the in vivo control of the operation of said medical electrical equipment, said sensor electronic circuitry being operable in a passive mode with low power consumption and an active mode with a higher power consumption;
• said sensor electronic circuitry including a power supply unit;
• and
• comparator means, having an output connected to said power supply unit, for comparing an output signal from said sensor element to a predetermined threshold and for controlling said power supply unit to switch said sensor electronic circuitry between said passive mode and said active mode dependent on the magnitude of said output signal of said sensor element in relation to said threshold.