发明名称 |
CMOS DIGITAL PULSE WIDTH MODULATION CONTROLLER |
摘要 |
A CMOS digital PWM controller chip includes a clock generator for directly generating a sampling clock at a frequency higher than a control pulse rate without requiring a phase locked loop, an oversampling analog-to-digital converter clocked by the sampling clock for converting error signals into filtered digital values, an output for controlling duty cycle of an electrical device in accordance with width-modulated digital control pulses supplied at the control pulse rate, and, digital control logic for generating the width-modulated digital control pulses in relation to the digital values. The digital control logic may include a linear feedback shift register to pseudo-randomize the digital control pulses to reduce electromagnetic interference.
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申请公布号 |
US2003174005(A1) |
申请公布日期 |
2003.09.18 |
申请号 |
US20020099703 |
申请日期 |
2002.03.14 |
申请人 |
LATHAM PAUL W.;LALIBERTE SHAWN;WONG CHUCK |
发明人 |
LATHAM PAUL W.;LALIBERTE SHAWN;WONG CHUCK |
分类号 |
H02M3/157;H02M3/335;(IPC1-7):H03K3/017 |
主分类号 |
H02M3/157 |
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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