METHODS AND SYSTEMS FOR CALIBRATING RC CIRCUITS
First Claim
Patent Images
1. A calibration apparatus, comprising:
- an RC integrator circuit;
a bandwidth setting controller to provide a bandwidth setting code indicating a reference bandwidth value for calibration of the RC integrator circuit;
a capacitance code generator, coupled to the RC integrator circuit, to generate a capacitance code to adjust a capacitance of the RC integrator circuit using the bandwidth setting code and a current capacitance value of the RC integrator circuit.
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Abstract
A calibration apparatus includes an RC integrator circuit. The calibration apparatus further includes a bandwidth setting controller to provide a bandwidth setting code indicating a reference bandwidth value for calibration of the RC integrator circuit and a capacitance code generator, coupled to the RC integrator circuit, to generate a capacitance code to adjust a capacitance of the RC integrator circuit using the bandwidth setting code and a current capacitance value of the RC integrator circuit.
21 Citations
28 Claims
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1. A calibration apparatus, comprising:
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an RC integrator circuit; a bandwidth setting controller to provide a bandwidth setting code indicating a reference bandwidth value for calibration of the RC integrator circuit; a capacitance code generator, coupled to the RC integrator circuit, to generate a capacitance code to adjust a capacitance of the RC integrator circuit using the bandwidth setting code and a current capacitance value of the RC integrator circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus, comprising:
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an RC integrator circuit; a bandwidth setting controller to provide a bandwidth setting code indicating a reference bandwidth value for calibration of the RC integrator circuit; a capacitance code generator coupled to provide feedback to the RC circuit, to adjust capacitance of the RC integrator circuit using the bandwidth setting code and a current capacitance value of the RC integrator circuit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A calibration apparatus, comprising:
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an RC integrator circuit including an output terminal; a control clock generator, to generate a plurality of control clocks; a counter, coupled to the control clock generator, to count clock pulses of at least one or the plurality of control clocks; a comparator, coupled to the output terminal, to compare a reference voltage with a voltage at the output terminal and to generate a trigger event to trigger the counter to stop counting; a digital controller to receive the counted clock pulses and to generate a bandwidth setting code; and a capacitance code generator, coupled to the RC integrator circuit, to generate a capacitance code to adjust a capacitance of the RC integrator circuit using a current capacitance value of the RC integrator circuit and the bandwidth setting code. - View Dependent Claims (21)
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22. A method of calibrating an RC integrator circuit, comprising:
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receiving a bandwidth setting code indicating a reference bandwidth value for calibration of the RC integrator circuit; calculating a current capacitance value of the RC integrator circuit; and generating a capacitance code to adjust the current capacitance value of the RC integrator using the bandwidth setting code and the current capacitance value of the RC integrator circuit. - View Dependent Claims (23, 24, 25, 26)
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27. A method of calibrating an RC integrator circuit, comprising:
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generating a plurality of control clocks; counting clock pulses of at least one of the plurality of control clocks; comparing a reference voltage with a voltage at an output terminal of an RC integrator circuit; causing the counter to stop counting; calculating a difference between a bandwidth setting code and a number of the counted clock pulses; and adjusting the capacitance of the RC integrator circuit based on the difference. - View Dependent Claims (28)
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Specification