Circuit for measuring and controlling differential voltages
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United States of America Patent
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Sep 13, 2011
Grant Date -
May 21, 2009
app pub date -
Mar 29, 2007
filing date -
Mar 31, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to circuits for managing differential voltages in series. To individually control the differential voltages of voltage sources in series, there is provided an integrated control circuit for a set of N sources in series. This circuit comprises N discharge control and measurement cells which are each produced in a separate well, insulated from the substrate and from the other wells. The cells are linked to the circuits formed in the substrate by level translation circuits having a part inside the well and a part outside the well. These circuits use transistors withstanding voltages of several tens of volts. The integrated circuits may be cascaded on an SPI bus if one wishes to control a group of k.N sources with k>1.
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