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US 10,761,186 B2Granted
RF receiver with built-in test capabilities
AssigneeInfineon Technologies AG
InventorsJochen O. Schrattenecker, Florian Starzer, Oliver Frank, Michael Kropfitsch, Georg Krebelder, Helmut Kollmann, Thomas Sailer
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Abstract
A radar device comprises a test signal generator including a digital harmonic oscillator that generates a digital oscillator signal with a first spectral component; a first digital-to-analog-converter that generates an analog oscillator signal based on the digital oscillator signal. Furthermore, the radar device comprises at least one radar channel receiving the analog oscillator signal during one or more self-tests.
Claims20
A radar device, comprising:
- a test signal generator comprising:
- a digital harmonic oscillator that is configured to generate a digital oscillator signal (SI[n]) with a first spectral component, and
- a digital-to-analog-converter that is configured to generate an analog oscillator signal (SI(t)) based on the digital oscillator signal (SI[n]);
- a modulator configured to convert the analog oscillator signal (SI(t)) into a radio frequency (RF) band for generating an RF test signal (SRFTEST) that includes the first spectral component shifted to the RF band;
- a radar channel (CH) including an RF receiver circuit that is configured to receive an RF input signal (SRX),
- the RF receiver circuit including:
- a mixer configured to receive the RF input signal (SRX) and a local oscillator signal (SLO) to down-convert the RF input signal (SRX) into an intermediate frequency (IF) or base band, and to provide the down-converted RF input signal (SRX) as mixer output signal (SBB), and
- an analog-to-digital converter configured to provide a digital radar signal (SRXDIG) representing the mixer output signal (SBB);
- and
- a signal processor configured to receive the digital radar signal (SRXDIG) and to determine at least one spectral component of the digital radar signal (SRXDIG),
- wherein, during a test, the RF test signal (SRFTEST) is directed, as RF input signal, to the radar channel (CH), and
- wherein the signal processor is configured to determine whether the at least one spectral component of the digital radar signal (SRFTEST) corresponds to the first spectral component.
9 more elements
A radar device, comprising:
- a test signal generator comprising:
- a digital harmonic oscillator that is configured to generate a digital oscillator signal (SI[n]) with a first spectral component, and
- a digital-to-analog-converter that is configured to generate an analog oscillator signal (SI(t)) based on the digital oscillator signal (SI[n]);
- a radar channel (CH) including a radio frequency (RF) receiver circuit that includes:
- a mixer configured to receive an RF input signal (SRX) of the radar channel (CH) and a local oscillator signal (SLO) to down-convert the RF input signal (SRX) into an intermediate frequency (IF) or base band, and to provide the down-converted RF input signal (SRX) as mixer output signal (SBB), and
- an analog-to-digital converter configured to provide a digital radar signal (SRXDIG) representing the mixer output signal (SBB);
- and
- a signal processor receiving the digital radar signal (SRXDIG) and configured to perform a spectral analysis of the digital radar signal (SRXDIG),
- wherein, during a test, the analog oscillator signal (SI(t)) is directed to a circuit node coupled to an output of the mixer of the radar channel (CH).
6 more elements
A radar device, comprising:
- a test signal generator comprising:
- a digital harmonic oscillator that is configured to generate a digital oscillator signal (SI[n]) with a first spectral component, and
- a digital-to-analog-converter that is configured to generate an analog oscillator signal (SI(t)) based on the digital oscillator signal (SI[n]);
- and
- at least one radar channel (CH) configured to receive the analog oscillator signal (SI(t)) during one or more self-tests.
2 more elements
A radar device, comprising:
- a test signal generator comprising:
- a digital harmonic oscillator that is configured to generate a digital oscillator signal (SI[n]) with a first spectral component, and
- a digital-to-analog-converter that is configured to generate an analog oscillator signal (SI(t)) based on the digital oscillator signal (SI[n]);
- a modulator configured to convert the analog oscillator signal (SI(t)) into a radio frequency (RF) band for generating an RF test signal (SRFTEST) that includes the first spectral component shifted to the RF band;
- and
- at least one radar channel (CH) configured to receive the RF test signal (SRFTEST) during one or more self-tests.
3 more elements
Dependencies are inferred from the claim text.