发明名称 |
FULLY INTEGRATED CIRCUIT FOR GENERATING A RAMP SIGNAL |
摘要 |
A fully integrated ramp generator circuit includes a first current generator that sources current to first capacitor through a first transistor that is gate controlled by the complement of a periodic signal. The ramping voltage stored on the first capacitor is buffered to an output node as a ramp output signal. A second transistor couples the output node to the first current generator and is gate controlled by the periodic signal. The periodic signal is generated at the output of a flip-flop that receives an input clock signal and reset signal. The reset signal is generated by a comparator circuit operable to compare the voltage on a second capacitor to a reference. The second capacitor is charged by a second current source and discharged by a third transistor that is gate controlled by the periodic signal.
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申请公布号 |
US2013169324(A1) |
申请公布日期 |
2013.07.04 |
申请号 |
US201213648557 |
申请日期 |
2012.10.10 |
申请人 |
STMICROELECTRONICS R&D (SHANGHAI) CO. LTD.;STMICROELECTRONICS R&D (SHANGHAI) CO. LTD. |
发明人 |
HUANG TAO TAO;WANG MENG |
分类号 |
H03K4/02 |
主分类号 |
H03K4/02 |
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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