公开(公告)号：US09461664B2

公开(公告)日：2016-10-04

申请号：US14090415

申请日：2013-11-26

Applicant: Semiconductor Components Industries, LLC

Inventor： Parthasarathy Sampath

IPC: H04N5/378 ,  H03M1/44 ,  H03M1/10 ,  H03M1/46 ,  H03M1/80

CPC classification number: H03M1/442 ,  H03M1/1038 ,  H03M1/468 ,  H03M1/804

Abstract: 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.

Abstract translation: 成像器可以包括从模拟输入电压产生数字输出代码的模拟 - 数字转换器电路。 模数转换器电路可以包括包括第一组二进制映射电容器的一系列电容器。 模数转换器电路可以包括具有小于二进制映射电容值的电容的一个或多个电容器的第二组。 数字输出代码可以包括在数字输出代码内具有相应位位置的位。 在由模数转换器电路执行的逐次逼近操作期间，可以使用对应的电容器来产生数字输出代码的每个位。 诸如图像处理器的数字处理电路可以通过将数字输出代码的位乘以基于相应电容器的电容确定的相应权重从数字输出代码产生数字值。