Patent ID: 6172494
Filing Date: 2001-01-09
Classification: G05F,G06K

Abstract:
A circuit arrangement for delivering a supply current for an electronic circuit from a supply voltage source, which arrangement includes a controllable current source arrangement which can be switched over so as to deliver a first and a second predetermined constant current, the second constant current being larger than the first constant current, and whose input is connected to the supply voltage source while its output is connected to an energy storage element and the electronic circuit, and also includes a first reference voltage source for preparing a first and a second reference voltage, being higher than the first reference voltage, as well as a comparison arrangement for comparing a supply voltage, produced in the electronic circuit and the energy storage element by the supply of the supply current, with the first and the second reference voltage and for switching over the current source arrangement to the first constant current when the supply voltage exceeds the second reference voltage and to the second constant current when the supply voltage is lower than the first reference voltage.