发明名称 |
MINIMUM PULSE WIDTH FOR PULSE WIDTH MODULATION CONTROL |
摘要 |
The rising edge of a pulse width modulated output signal occurs after an input ramp signal starts to rise. The ramp signal starts to rise after the rising edge of a periodic set signal and before the falling edge of a periodic set signal. A feedback control signal intersects a substantially linear region of the ramp signal to generate a reset signal using a PWM comparator. The periodic set signal and reset signal are input to a latching circuit to generate the pulse width modulated output signal. The minimum pulse width can approach zero while having adequate overdrive to the PWM comparator. Having the rising edge of the reset signal rise before the falling edge of the set signal can allow a zero percent duty cycle without the need for a ramp offset voltage.
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申请公布号 |
US2010033261(A1) |
申请公布日期 |
2010.02.11 |
申请号 |
US20080187359 |
申请日期 |
2008.08.06 |
申请人 |
INTERNATIONAL RECTIFIER CORPORATION |
发明人 |
STEVENSON BRIAN;PARTO PARVIZ;CHEN YANG |
分类号 |
H03K7/08 |
主分类号 |
H03K7/08 |
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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