发明名称 |
Nonlinearity calibration scheme for a frequency modulation transmitter |
摘要 |
A nonlinearity calibration system and method for a frequency modulation (FM) transmitter. A nonlinearity calibration system for a FM transmitter includes a digitally controlled oscillator (DCO) with a variable capacitor array. The DCO receives a calibrated fine code for tuning the variable capacitor array to modulate a digitally encoded audio signal transmitted by the FM transmitter to a modulation frequency. The nonlinearity calibration system also includes a nonlinearity estimator for generating an approximation of an integral nonlinearity associated with processing of a fine code to tune the variable capacitor array. The nonlinearity calibration system further includes a subtractor for subtracting the approximation of the integral nonlinearity from the fine code to generate the calibrated fine code.
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申请公布号 |
US8346188(B2) |
申请公布日期 |
2013.01.01 |
申请号 |
US20090485068 |
申请日期 |
2009.06.16 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED;SUBBURAJ KARTHIK;NAGARAJ KRISHNASWAMY |
发明人 |
SUBBURAJ KARTHIK;NAGARAJ KRISHNASWAMY |
分类号 |
H04B1/62 |
主分类号 |
H04B1/62 |
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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