| 摘要 |
An improved apparatus for powering electrical components in an absolute position measuring device of the type including a coded scale and a scanning unit for reading the coded scale, wherein the scanning unit contains a code generator having a plurality of electrical components such as light-emitting diodes. The disclosed apparatus includes a capacitor connected in parallel with the components and a switching element, such as a transistor, connected in series with the components and in parallel with the capacitor. The switching element is responsive to a switching pulse of defined duration and voltage and it selectively applies a supply voltage to and interrupts the supply voltage from the electrical components.
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