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System and method for measuring DC offset in a sensor output by modulating a signal-independent operating parameter of the sensor
US8965726B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8965726-B2 |
| Application number | US-7064108-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 20, 2008 |
| Priority date | Feb 20, 2008 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
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A sensor circuit enables detection of DC offset in a sensor output signal. The sensor circuit includes a sensor that generates a sensor output signal corresponding to a physical signal coupled to an input of the sensor, and a modulator that generates a modulation signal, the modulator being coupled to the sensor to modulate a physical parameter of the sensor and to enable a DC offset to be separated from the sensor output signal. To enable the circuit to measure the DC offset even though the sensor output signal is inversely proportional to the output signal, the circuit includes a feedback circuit configured to generate a feedback signal. The feedback signal is coupled to the input of the sensor to enable the physical parameter of the sensor to be modulated without modulating a portion of the sensor output signal attributable to the physical signal being converted to an electrical signal by the sensor.
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We claim: 1. A sensor circuit that enables detection of DC offset in a sensor output signal comprising: a sensor that generates a sensor output signal corresponding to a physical signal coupled to an input of the sensor, the sensor output signal having an input signal dependent component and a DC offset component; and a controller that generates a modulation signal, the modulation signal being operatively coupled to the sensor to modulate a physical parameter of the sensor and t…
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- G01D3/036Primary
Physics · mapped topic
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- What does patent US8965726B2 cover?
- A sensor circuit enables detection of DC offset in a sensor output signal. The sensor circuit includes a sensor that generates a sensor output signal corresponding to a physical signal coupled to an input of the sensor, and a modulator that generates a modulation signal, the modulator being coupled to the sensor to modulate a physical parameter of the sensor and to enable a DC offset to be sepa…
- Who is the assignee on this patent?
- Lajevardi Pedram, Petkov Vladimir Plamenov, Lang Christoph, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification G01D3/036. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).