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US 11,515,887 B2Granted
Device comprising a sensor, controller and corresponding methods
AssigneeInfineon Technologies AG
InventorMario Motz
Life of this patent
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Abstract
A device includes a sensor configured to output an analog sensor signal, an analog-to-digital converter circuit configured to convert the analog sensor signal into a sigma-delta-modulated digital signal having a bit width of n bits, and a pulse width modulator configured to generate a pulse-width-modulated signal based on the sigma-delta-modulated digital signal.
Claims20
A device, comprising:
- a sensor configured to output an analog sensor signal;
- an analog-to-digital converter circuit configured to convert the analog sensor signal into a first digital signal having a bit width of n bits, wherein the first digital signal is a sigma-delta-modulated signal and n is equal to or greater than one;
- and
- a pulse width modulator configured to generate a pulse-width-modulated signal based on the first digital signal,
- wherein the analog-to-digital converter circuit comprises:
- an analog-to-digital converter configured to convert the analog sensor signal into a second digital signal having a bit width of m bits, wherein m is an integer greater than one;
- and
- a digital sigma-delta modulator configured to generate the first digital signal having the bit width of n bits where n<m based on the second digital signal.
5 more elements
A device, comprising:
- a sensor configured to output an analog sensor signal;
- an analog-to-digital converter circuit configured to convert the analog sensor signal into a first digital signal having a bit width of n bits, wherein the first digital signal is a sigma-delta-modulated signal and n is equal to or greater than one;
- a pulse width modulator configured to generate a pulse-width-modulated signal based on the first digital signal;
- and
- a further sensor configured to output a further sensor signal, wherein the pulse width modulator is configured to modulate the pulse-width-modulated signal based on the further sensor signal as a pulse code.
2 more elements
A device, comprising:
- a sensor configured to output an analog sensor signal;
- an analog-to-digital converter circuit configured to convert the analog sensor signal into a first digital signal having a bit width of n bits, wherein the first digital signal is a sigma-delta-modulated signal and n is equal to or greater than one;
- and
- a pulse width modulator configured to generate a pulse-width-modulated signal based on the first digital signal,
- wherein the pulse width modulator is configured to generate the pulse-width-modulated signal with pulse durations in a first range based on the first digital signal, and to generate the pulse-width-modulated signal with pulse durations in a second range, which is different than the first range, based on further information.
2 more elements
A device, comprising:
- a sensor configured to output an analog sensor signal;
- an analog-to-digital converter circuit configured to convert the analog sensor signal into a first digital signal having a bit width of n bits, wherein the first digital signal is a sigma-delta-modulated signal and n is equal to or greater than one;
- and
- a pulse width modulator configured to generate a pulse-width-modulated signal based on the first digital signal,
- wherein the analog-to-digital converter circuit has a chopper circuit, which is configured to operate with a chopper frequency, wherein a cycle of the pulse-width-modulated signal contains an integral number of periods of the chopper frequency.
2 more elements
A controller, comprising:
- an input configured to receive a pulse-width-modulated signal from a sensor device;
- and
- a processing circuit configured to generate a first digital reception signal based on averaging over k cycles of the pulse-width-modulated signal, where k is greater than or equal to 2.
A method, comprising:
- generating a first digital signal having a bit width of n bits based on an analog sensor signal, wherein the first digital signal is a sigma-delta-modulated signal and n is equal to or greater than one;
- and
- generating a pulse-width-modulated signal based on the first digital signal,
- wherein generating the first digital signal comprises converting the analog sensor signal into a second digital signal having a bit width of m bits, wherein m is an integer greater than one, and performing a digital sigma-delta modulation of the second digital signal in order to generate the first digital signal having the bit width of n bits where n<m.
1 more element
A method, comprising:
- receiving from a sensor device a pulse-width-modulated signal generated based on a sigma-delta-modulated signal;
- and
- generating a first digital signal based on averaging over k cycles of the pulse-width-modulated signal, where k is greater than or equal to 2.
Dependencies are inferred from the claim text.