Voltage supply for a sensor
AssigneeGeorg Dieter Mirow
InventorsGeorg Dieter Mirow, Tilmann Krueger
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Abstract
According to the invention, sensors which require a high voltage supply and require little current at least for temporary periods are supplied by an blocking oscillator with a high degree of efficiency. The efficiency of said blocking oscillator is due to the low inverse current of the rectifier, the blockage recovery time being short at the same time, the low consumption of the controlling system, and economical and therefore inexpensive voltage measurement. In particular, batteries with an especially long life can be used.
Claims11
Method for supplying voltage for a high-impedance load from a high voltage, in which case the high voltage (9) is produced from a low voltage (12) using a flyback converter which, when a switching transistor (3) in the flyback converter changes to the switched-off state, supplies charge to a energy-storage capacitor (8), via a rectifier (5), by means of a current which is maintained by an inductor (4) in the flyback converter, characterized in that the charge flowing out via the rectifier (5) in the reverse direction is limited in the rectifier (5) by means of a diode which has a low reverse current and by means of a further diode which has a short recovery time.
Dependencies are inferred from the claim text.