发明名称 |
Digital/analog converter and image processing apparatus using the same |
摘要 |
An image processing apparatus having: an unit for receiving a digital multi-value pixel data; a D/A converter for converting the inputted multi-value pixel data into an analog signal; a generator for generating an analog pattern signal synchronously with an input of the digital multi-value pixel data; a sample/hold circuit for sampling and holding the analog signal converted by the D/A converter, synchronously with an input of the digital multi-value pixel data; and a binarizing circuit for generating a binarized pulse signal having a width corresponding to the value of the digital multi-value pixel data by comparing the analog signal held the said sample/hold circuit with the pattern signal generated by the pattern signal generator. A D/A converter having: a digital/analog conversion unit for converting a digital signal into an analog signal at the same speed as the period of generating the digital signal; and a sample/hold circuit for holding and outputting the analog signal converted by the digital/analog conversion unit, synchronously with the period of generating the digital signal.
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申请公布号 |
US5272544(A) |
申请公布日期 |
1993.12.21 |
申请号 |
US19910704201 |
申请日期 |
1991.05.23 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
SAKAI, MASANORI;HIROOKA, KAZUHIKO;WATANABE, MASAO |
分类号 |
H04N1/405;(IPC1-7):H04N1/40 |
主分类号 |
H04N1/405 |
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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