Invention Application
US20020126028A1 Process for compensating matching errors in analog/digital converters with cascaded structure and a corresponding converter
审中-公开
用于补偿具有级联结构的模/数转换器中的匹配误差的过程和相应的转换器
- Patent Title: Process for compensating matching errors in analog/digital converters with cascaded structure and a corresponding converter
- Patent Title (中): 用于补偿具有级联结构的模/数转换器中的匹配误差的过程和相应的转换器
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Application No.: US10024466Application Date: 2001-12-17
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Publication No.: US20020126028A1Publication Date: 2002-09-12
- Inventor: Sandro Dalle Feste , Nadia Serina , Giovanni Cesura , Marco Bianchessi
- Applicant: STMicroelectronics S.r.I.
- Applicant Address: IT Agrate Brianza
- Assignee: STMicroelectronics S.r.I.
- Current Assignee: STMicroelectronics S.r.I.
- Current Assignee Address: IT Agrate Brianza
- Priority: EP00830829.8 20001218
- Main IPC: H03M001/10
- IPC: H03M001/10
Abstract:
A test signal with given spectral characteristics is injected at input to the quantizer stage of the converter. The same test signal is subjected to cross-correlation with a given signal so as to generate coefficients used for filtering the quantization noise converted into digital form. In this way, a compensation signal is obtained that is applied to the output signal of the quantizer stage jointly with a first compensation signal obtained by applying, to the quantization noise converted into digital form, the same transfer function 28) of the converter. In this way a signal is obtained which, in addition to being used as the global output signal of the converter, is also used for the aforesaid operation of cross-correlation with the test signal.
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