Device for digitizing an analogue signal

Patent metadata

Field	Value
Publication number	US-10027337-B2
Application number	US-201515504150-A
Country	US
Kind code	B2
Filing date	Sep 25, 2015
Priority date	Sep 26, 2014
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A device for digitizing an analog signal, wherein a distortion signal outlet of a distortion signal generator is only coupled to an analog digital converter by passive components.

First claim

The invention claimed is:

1. An apparatus for digitizing an analog signal, comprising:
an analog-to-digital converter having a signal input for the analog signal, and
a distortion signal generator having a distortion signal output, wherein the distortion signal generator is designed to deliver a distortion signal at the distortion signal output, wherein
the distortion signal output is coupled to the analog-to-digital converter exclusively by passive components.

2. The apparatus as claimed in claim 1 , wherein
the distortion signal output is coupled to the analog-to-digital converter without active components.

3. The apparatus as claimed in claim 2 , wherein the analog-to-digital converter is part of a microcontroller.

4. The apparatus as claimed in claim 1 , wherein
the analog-to-digital converter is part of a microcontroller.

5. The apparatus as claimed in claim 4 , wherein
the distortion signal generator is also part of the microcontroller.

6. The apparatus as claimed in claim 5 , wherein
the distortion signal generator is implemented by a digital output of the microcontroller, which forms the distortion signal output.

7. The apparatus as claimed in claim 1 wherein,
the analog-to-digital converter has a differential input, and
wherein the distortion signal output is coupled to a connection of the differential input.

8. The apparatus as claimed in claim 7 , wherein
the distortion signal output and a reference potential have a voltage divider connected between them, and
wherein the connection of the differential input is connected to an output of the voltage divider.

9. The apparatus as claimed in claim 8 , wherein
the connection of the differential input and the reference potential have a capacitor connected between them,
which spans at least one resistor of the voltage divider.

10. The apparatus as claimed in claim 8 , wherein
a resistor of the voltage divider that is connected between the distortion signal output and the output of the voltage divider is larger than a second resistor that is connected between the output of the voltage divider and the reference potential.

11. The apparatus as claimed in claim 8 , wherein the reference potential is ground.

12. The apparatus as claimed in claim 1 , wherein
the analog-to-digital converter has a reference input in addition to the signal input, and
wherein the distortion signal output is coupled to the reference input.

13. The apparatus as claimed in claim 12 , wherein
the distortion signal output and a reference potential have a voltage divider connected between them, and
wherein the reference input is connected to an output of the voltage divider.

14. The apparatus as claimed in claim 13 , wherein
the reference input and the reference potential have a capacitor connected between them,
which spans at least one resistor of the voltage divider.

15. The apparatus as claimed in claim 13 , wherein the reference potential is a positive potential.

16. The apparatus as claimed in claim 1 , wherein
the distortion signal output and a signal connection delivering the signal are coupled to the signal input.

17. The apparatus as claimed in claim 16 , wherein
the distortion signal output is coupled by DC voltage to the signal input, and
the signal connection is coupled by AC voltage to the signal input.

18. The apparatus as claimed in claim 17 , wherein the distortion signal output and a reference potential have a voltage divider connected between them, and
wherein the signal input is connected to an output of the voltage divider.

19. The apparatus as claimed in claim 16 , wherein
the distortion signal output and a reference potential have a voltage divider connected between them, and
wherein the signal input is connected to an output of the voltage divider.

20. The apparatus as claimed in claim 1 , wherein the distortion signal output is coupled to the analog-to-digital converter without an operational amplifier.

Assignees

• Continental Teves Ag & Co Ohg

Inventors

• Acker Heinrich

Classifications

• H03M1/60

  with intermediate conversion to frequency of pulses · CPC title

• H03M1/124

  Sampling or signal conditioning arrangements specially adapted for A/D converters · CPC title

• H03M1/1009

  Calibration · CPC title

• H03M1/0614

  of harmonic distortion (H03M1/0617 takes precedence) · CPC title

• H03M1/002

  Provisions or arrangements for saving power, e.g. by allowing a sleep mode, using lower supply voltage for downstream stages, using multiple clock domains or by selectively turning on stages when needed · CPC title