Resistor calibration using a MOS capacitor

    公开(公告)号:US09793181B2

    公开(公告)日:2017-10-17

    申请号:US14659051

    申请日:2015-03-16

    Inventor: Vratislav Michal

    CPC classification number: H01L22/14 H01C17/22 H01C17/26

    Abstract: A method for calibrating a resistance value comprises the steps of measuring a value of a reference capacitor, and adjusting a variable resistor based on the measured value of the reference capacitor. The method may more specifically comprise the steps of directing a constant current through the reference capacitor during a reference time interval; after the reference time interval, directing the constant current through the variable resistor; and varying the variable resistor value progressively by varying a control signal until a voltage of the variable resistor reaches a voltage of the reference capacitor.

    Counter circuit
    155.
    发明授权

    公开(公告)号:US09774333B2

    公开(公告)日:2017-09-26

    申请号:US14882868

    申请日:2015-10-14

    Inventor: Cedric Tubert

    CPC classification number: H03K23/542

    Abstract: A counter circuit includes a first Johnson counter circuit and a second Johnson counter circuit coupled in cascade. Each Johnson counter circuit includes a clock input, a data input, a first clock data output, a second clock data output and a feedback from the second clock data input to first data input. The clock input of the first Johnson counter circuit is configured to receive an input clock signal. The clock input of the second Johnson counter circuit is connected to the second clock data output of the first Johnson counter circuit. A ripple counter circuit has a clock input and additional clock data outputs. The clock input of the ripple counter circuit is connected to the second clock data output of the preceding Johnson counter circuit.

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