Circuit for securing a power supply

A circuit for isolating the electrical characteristics of a load from the electromagnetic radiation emanating from a power supply comprising:

• energy storage means for receiving electrical energy from the power supply and supplying current to said load wherein said current to said load is isolated from the output current from the power supply to isolate the electrical characteristics of the load from the electromagnetic radiation emanating from the power supply;
• switching means for controlling the current supplied by the power supply to said energy storage means so that the power supply delivers electrical energy to said energy storage means at first and second current levels, said first current level being greater than the average current required to supply the load and at said second current level lower than the average current level required to supply the load, wherein said switching means controls the power supply to ensure that said energy storage means receives sufficient power to supply said load while keeping the electrical characteristics of the load independent of the electromagnetic radiation emanating from the power supply;
• comparator means for comparing the voltage across said energy storage means to first and second reference voltages and actuating said switching means in response to said voltage across said energy storage means;
• said first reference voltage being greater than said second reference voltage;
• and
• said switching means controlling the power supply so that when said comparator means detects that the voltage across said energy storage means reaches said first reference voltage, said switching means causes the power supply to provide electrical power to said energy storage means at said second current level and when said comparator means detects that the voltage across said energy storage means equals said second reference voltage, said switching means causes the power supply to provide electrical power to said energy storage means at said first current level.

A circuit for isolating the electrical characteristics of a load from the electromagnetic radiation emanating from a power supply comprising:

• a capacitor receiving energy from the power supply and supplying current to the load, wherein said current to the load is isolated from the output current from the power supply to isolate the electrical characteristics of the load from the electromagnetic radiation emanating from the power supply;
• switching means for controlling the current supplied by the power supply to said capacitor so that the power supply delivers electrical energy to said capacitor at first and second current levels, said first current level being higher than the average current required to supply the load and said second current level being lower than the average current required to supply the load, so that said capacitor is charging in spite of the influence of the load at said first current level and discharging under the influence of the load at said second current level, wherein said switching means controls the power supply to ensure that said capacitor receives sufficient power to supply the load while keeping the electrical characteristics of the load independent of the energy from the power supply;
• comparator means for comparing the volage across said capacitor to first and second reference voltages and actuating said switching means in response to said voltage across said capacitor;
• said first reference voltage being greater than said second reference voltage;
• and
• said switching means controlling the power supply so that when said comparator means detects that the voltage across said capacitor reaches said first reference voltage, said switching means causes the power supply to provide electrical power to said energy storage means at said second current level and when said comparator means detects that the voltage across said energy storage means equals said second reference voltage, said switching means causes the power supply to provide electrical power to said energy storage means at said first current level.