Patent ID: 8587289
Filing Date: 2013-11-19
Classification: G01R,H03K

Abstract:
1. A method of determining an offset of a periodic signal, comprising: feeding the periodic signal to a first and a second integrator and to a periodicity recognition unit; integrating the first integrator over a full period; integrating the second integrator over a full period offset by a half period; controlling starting times of the integrating of the first and second integrators by the periodicity recognition unit; storing output signals of the two intergrators after a period duration in two memory devices; summing the output signals in a sum signal, wherein the sum signal represents the offset of the periodic signal, suppressing a synchronization phase; feeding the output signals of the two memory devices each assigned to one of the integrators to a comparator circuit; and storing the sum signal of the output signals of the two memory devices in a further memory device, the sum signal being held as an output signal, wherein the comparator circuit, on an occurrence of different amounts of the output signals of the two memory devices, triggers the further memory device to continue outputting for a specific period of time a value of the output signal stored in the further memory device.