Measuring and testing – Speed – velocity – or acceleration – Recording or registering interrelated factors
Reexamination Certificate
2008-09-10
2011-11-08
Kwok, Helen C. (Department: 2856)
Measuring and testing
Speed, velocity, or acceleration
Recording or registering interrelated factors
Reexamination Certificate
active
08051711
ABSTRACT:
The electronic circuit for measuring at least one physical parameter supplies an analogue output measurement signal (SA) dependent upon the value of a supply voltage. The circuit includes a sensor interface, connected to a sensor for supplying an analogue measurement signal (Vm) which is then filtered, an analogue-digital converter for digitally converting the filtered signal (Sm), and a digital signal control and processing unit for receiving a converted signal from the converter and supplying a digital measurement signal (SD). The sensor interface, the analogue-digital converter, and the processing unit are powered by a voltage regulator. The analogue and digital measurement signals are thus independent of any variation in the supply voltage (VCC) of the electronic circuit. A ratiometric unit, which may be an analogue multiplier or an analogue-digital converter, is powered by the supply voltage source (Bat) to recreate ratiometry on SAon the basis of Smor SD.
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Swiss search report issued in corresponding application No. Ch 1431/07, dated Oct. 17, 2007.
Grosjean Sylvain
Pfefferli Beat
Willemin Michel
EM Microelectronic-Marin S.A.
Griffin & Szipl, P.C.
Kwok Helen C.
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