公开(公告)号：US20240142503A1

公开(公告)日：2024-05-02

申请号：US18493866

申请日：2023-10-25

Applicant: Infineon Technologies AG

Inventor： Wei Wang ,  Michael Augustin ,  Jürgen Schäfer ,  Dietmar König ,  Josef Niederl ,  Shane O'Neill

IPC: G01R23/167

CPC classification number: G01R23/167

Abstract: According to various embodiments, a circuit for determining the frequency of a signal is described, comprising an input configured to receive an analog input signal, an analog to digital converter configured to convert the analog input signal to a digital input signal, a digital mixer configured to generate a mixing result signal by mixing the digital input signal with a single bit binary signal having a reference frequency, a low pass filter configured to generate a filtered signal by filtering the mixing result signal, a measuring circuit configured to measure the period of the filtered signal and an output configured to output a value differing from the frequency of the single bit binary signal by the inverse of the measured period as the frequency to be determined.