发明名称 |
Velocity error generator with first-order interpolation |
摘要 |
There is an apparatus for generating a velocity error signal for use in a time base corrector. This apparatus comprises: an A/D converter that converts a velocity error to a digital signal that is fed to a summing circuit to convert it to a phase shift amount. A zero value interpolation circuit multiplies the sampling frequency of the phase shift amount with an integer and a digital low-pass filter interpolates an output signal of the interpolation circuit. A differentiating circuit to convert an interpolated phase shift amount of an output signal of the LPF to a phase difference and a D/A converter 9 converts the digital phase difference data to an analog signal. With this apparatus, the velocity error can be accurately corrected.
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申请公布号 |
US5161032(A) |
申请公布日期 |
1992.11.03 |
申请号 |
US19900593393 |
申请日期 |
1990.10.02 |
申请人 |
SONY CORPORATION |
发明人 |
KOBAYASHI, YUJI;TAKAMORI, TSUTOMU |
分类号 |
G11B20/02;H04N5/95;H04N9/89;H04N9/896 |
主分类号 |
G11B20/02 |
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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