发明名称 |
IMAGING PIXELS WITH IMPROVED ANALOG-TO-DIGITAL CIRCUITRY |
摘要 |
Imagers may include analog-to-digital converter circuitry that produces a digital output code from an analog input voltage. The analog-to-digital converter circuitry may include a series of capacitors including a first set of binary-mapped capacitors. The analog-to-digital converter circuitry may include a second set of one or more capacitors that have capacitances that are less than binary-mapped capacitance values. The digital output code may include bits having respective bit positions within the digital output code. During successive-approximation operations performed by the analog-to-digital converter circuitry, each bit of the digital output code may be produced using a corresponding capacitor. Digital processing circuitry such as an image processor may produce a digital value from the digital output code by multiplying the bits of the digital output code with respective weights determined based on the capacitance of the corresponding capacitors. |
申请公布号 |
US2015146055(A1) |
申请公布日期 |
2015.05.28 |
申请号 |
US201314090415 |
申请日期 |
2013.11.26 |
申请人 |
Aptina Imaging Corporation |
发明人 |
Sampath Parthasarathy |
分类号 |
H04N5/3745;H03M1/44;H04N5/378;H03M1/06 |
主分类号 |
H04N5/3745 |
代理机构 |
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代理人 |
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主权项 |
1. Imaging circuitry, comprising:
an analog-to-digital converter circuit that produces a digital output code from an analog input voltage and comprises a plurality of capacitors having binary-mapped capacitances and an additional capacitor having a given capacitance that is less than a binary-mapped capacitance; and digital processing circuitry that generates a digital output value from the digital output code from the analog-to-digital converter circuit. |
地址 |
George Town KY |