RF receiver with built-in self-test function

US10278084B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Florian Starzer · Ansfelden, AT
• Peter Bogner · Wernberg, AT
• Oliver Frank · Hannover, DE
• Guenter Haider · Linz, AT
• Michael Kropfitsch · Ferlach, AT
• Thomas Sailer · Metzingen, DE
• Jochen Schrattenecker · Eisenlohrsweg, AT
• Rainer Stuhlberger · Puchenau, AT

Key dates

• Filing date: Jul 13, 2018
• Grant date: Apr 30, 2019
• Expiry date: Jul 13, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M1/1245
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A radar sensor includes a mixer configured to receive an radio frequency (RF) input signal to down-convert the RF input signal into a base-band or intermediate frequency (IF) band, an analog-to-digital converter (ADC), and a signal processing chain coupled between the mixer and the ADC. The radar sensor further includes an oscillator circuit that is configured to generate a test signal. The ADC is coupled to an output of the signal processing chain, and is configured to generate a digital signal by digitizing an output signal of the signal processing chain, the output signal being derived from the test signal. The radar sensor further includes a digital signal processing circuit coupled to the ADC downstream thereof, the digital signal processing circuit being configured to perform a spectral analysis on frequency values of the digital signal.