发明名称 |
Calibration circuit for calibrating an adjustable capacitance of an integrated circuit having a time constant depending on said capacitance |
摘要 |
A calibration circuit calibrates an adjustable capacitance of a circuit having a time constant depending on the adjustable capacitance. The calibration circuit outputs a calibration signal carrying information for calibrating the capacitor and includes a calibration loop. The calibration circuit includes: a controllable capacitance unit suitable to receive a control signal and including at least one array of switched capacitors that can be activated by the control signal, the unit being such as to output a first signal characterized by a parameter depending on the amount of capacitance of the array activated by the control signal; a comparison unit suitable to receive the first signal to assess whether the parameter meets a preset condition and to output a comparison signal representative of the assessment result; a control and timing logic unit suitable to receive the comparison signal to change this control signal based on the comparison signal, characterized in that the first signal is a logic signal and the parameter is a time parameter of the first signal.
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申请公布号 |
US7742893(B2) |
申请公布日期 |
2010.06.22 |
申请号 |
US20080035308 |
申请日期 |
2008.02.21 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
CONFALONIERI PIERANGELO;MARTIGNONE RICCARDO;ZAMPROGNO MARCO |
分类号 |
G01R35/00 |
主分类号 |
G01R35/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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