Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2011-07-26
2011-07-26
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C327S558000, C327S552000, C327S337000
Reexamination Certificate
active
07986181
ABSTRACT:
A calibration circuit for calibrating an adjustable capacitance of a circuit having a time constant depending on the adjustable capacitance, the calibration circuit generating a calibration signal for calibrating the capacitance and including a calibration loop, suitable to carry out a calibration cycle in several sequential steps. The calibration circuit includes a controllable capacitance for receiving a control signal and including an array of switched capacitors selectively activated by the control signal to connect to a first common node that conducts a voltage value depending on the total capacitance value of the activated capacitors; an assessment unit for comparing this voltage value with a reference voltage to output a logic signal that can transition between first and second logic levels; a control and timing unit to receive the logic signal and change the control signal to carry out a subsequent calibration step that is provided at the end of the integration interval during a comparison interval of a preset duration, which allows a transition of the logic signal to occur prior to the beginning of the consecutive calibration step.
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Confalonieri Pierangelo
Martignone Riccardo
Nicollini Germano
Le Dinh T.
Seed IP Law Group PLLC
STMicroelectronics S.r.l.
Tarleton E. Russell
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