发明名称 |
Raster distortion correction arrangement |
摘要 |
Synchronization of a horizontal deflection circuit with horizontal synchronizing signal pulses is obtained by the use of a voltage controlled oscillator (VCO) that is included in a phase-lock loop circuit (PLL). A phase-control loop circuit (PCL) includes a phase detector having a first input terminal that is responsive to an output signal of the VCO and a second input terminal that is responsive to retrace pulses of a horizontal deflection circuit output stage. A sum signal of the phase detector output signal of the PLL and a vertical rate parabola signal is formed upstream of the loop filter of the PLL. Correction of a differential pin distortion is accomplished by dynamically phase shifting the phase of an output signal of the VCO in a vertical rate parabola manner.
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申请公布号 |
US2003043305(A1) |
申请公布日期 |
2003.03.06 |
申请号 |
US20020183725 |
申请日期 |
2002.06.25 |
申请人 |
WILBER JAMES ALBERT;KNIGHT PETER RONALD |
发明人 |
WILBER JAMES ALBERT;KNIGHT PETER RONALD |
分类号 |
H04N3/23;G09G1/00;G09G1/04;H04N3/233;(IPC1-7):H04N3/22;H04N3/26 |
主分类号 |
H04N3/23 |
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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