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rf receiver with built in self test

A technology for receiving circuits and testing signals, applied in amplifiers, instruments, amplifiers, etc. with semiconductor devices/discharge tubes, and can solve reliability problems and other problems

Active Publication Date: 2020-10-23
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reliability can also be an issue in applications other than radar

Method used

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  • rf receiver with built in self test
  • rf receiver with built in self test
  • rf receiver with built in self test

Examples

Experimental program
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Embodiment Construction

[0019] Embodiments of the invention are discussed below in the context of a radar transceiver. However, it should be noted that the invention may also be applied in applications other than radar, such as in RF transceivers of RF communication devices.

[0020] So-called "single-chip radars" may include circuitry that provides the core RF functionality required for distance and / or velocity measurement in one chip. Thus, the chip may include, inter alia, RF front-end circuits such as RF oscillators, amplifiers and mixers, and may include baseband (or intermediate frequency (IF) band) circuits such as amplifiers and analog filters. Additionally, an analog-to-digital converter may be included in the chip to digitize baseband or IF-band signals. In future sensor designs, a digital signal processor could also be included in the chip along with the ADC, baseband circuitry, and RF front-end circuitry. However, in today's radar sensors, the signal processor is usually implemented in ...

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PUM

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Abstract

The present invention relates to RF receivers with built-in self-test functionality. An RF receive circuit is described herein. According to one embodiment, the RF receiving circuit includes: a mixer configured to receive an RF input signal to down-convert the RF input signal into baseband or intermediate frequency (IF) band, an analog-to-digital converter (ADC ), and a signal processing chain coupled between the mixer and the ADC. The signal processing chain includes at least two circuit nodes. The RF receive circuit further includes an oscillator circuit configured to generate a test signal. The oscillator circuit is coupled to the signal processing chain and configured to selectively feed an oscillator signal into one of the at least two circuit nodes.

Description

technical field [0001] The present disclosure relates to the field of radio frequency (RF) transceiver or receiver circuits, and more particularly, to RF transceiver or receiver chips with built-in self-test functionality. Background technique [0002] Radio frequency (RF) transceivers and receivers can be found in many applications, especially in the fields of wireless communications and radar sensors. In the automotive industry, there is an increasing demand for radar sensors used in so-called "adaptive cruise control" (ACC) or "radar cruise control" (RCC) systems. Such a system can be used, for example, to automatically adjust the speed of a car in order to maintain a safe distance from other cars or other objects in front. [0003] Modern radar systems utilize highly integrated RF circuitry that can combine all core functions of the radar transceiver's RF front-end in a single package (single-chip transceiver). Such an RF front-end may include, inter alia, voltage-cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40G01S7/02
CPCG01S7/02G01S7/4004H03F3/195H03F2200/165H03F2200/333H03F2200/451H03M1/1245H04B1/16H04W24/06
Inventor P.博格纳O.弗兰克G.海德M.克罗普菲奇T.赛勒J.O.施拉特内克F.施塔尔策R.施图尔贝格
Owner INFINEON TECH AG