设计了一种用于CMOS图像传感器列级模数转换器(Analog-to-Digital Converter, ADC)电路的10位斜坡发生器。详细 介绍了电路的整体结构、工作模式以及仿真结果。在电路中采用了两级转换的方式, 并设计了电阻阵 列式多路斜坡发生器。在Cadence设计平台下, 对模拟电路进行了设计、仿真和版图设计。 采用0.5 m双层多晶三层金属(Double Poly Triple Metal, DPTM) CMOS工艺对电路进行了制作。仿真结果表明, 该设计基本满足相关要求。

A 10-bit ramp generator for column-level Analog-to-Digital Converter (ADC) circuits of CMOS image sensors is designed. The integral structure, operation mode and simulation result of the circuit is presented in detail. In the circuit, a two-stage conversion mode is used and a resistor-array ramp generator is designed. The circuit design, simulation and layout design are achieved on the platform of Cadence. The proposed ramp generator is taped out in an 0.5 m DPTM CMOS process. The simulation result shows that this design meets the related requirements basically.