← 返回 JSSC 论文列表JSSC 2007第9期Power Management0.35μm
A Current-Mode, Dual Slope, Integrated Capacitance-to-Pulse Duration Converter Paolo Bruschi, Nicolò Nizza, and
一种用于电容传感器的电流模式双斜率电容-脉冲持续时间转换器
0.35μm, 3.3V BCD6工艺
电容传感器双斜率电流模式脉冲持续时间转换器Miller积分器
▸创新点1：温度敏感性低（电路创新）。该电路采用双斜率方法，结合跨导放大器实现的Miller积分器，显著降低了温度对电容-脉冲持续时间转换的影响，提升了系统在宽温度范围内的稳定性。
▸创新点2：偏移和增益修调简单（系统创新）。通过优化电路设计，简化了偏移和增益的修调过程，有效校正了传感器参数的分散性，提高了系统的精度和一致性。
▸创新点3：快速唤醒时间（系统创新）。电路设计优化了启动机制，实现了快速唤醒，显著减少了系统从休眠到工作状态的过渡时间，提升了响应速度。
▸创新点4：基于BCD6工艺的实现（工艺创新）。采用STMicroelectronics的0.35μm BCD6工艺，结合Bipolar-CMOS-DMOS技术，实现了高性能、低功耗的电容-脉冲持续时间转换器，适用于多种传感器接口应用。
Abstract
A capacitance-to-pulse duration converter, specifi- cally designed for interfacing capacitive sensors, is presented. The operating principle is a double slope approach implemented using transconductor-based Miller integrators. The main strengths of the proposed circuit are: 1) intrinsically small sensitivity to tem- perature; 2) simplicity of trimming offset and gain to correct the sensor parameter spread; and 3) fast wake-up time. The circuit nonidealities are analyzed in order to identify the elements re- sponsible for the residual temperature sensitivity and jitter on the pulse duration. The effectiveness of the method is demonstrated by measurements performed on a prototype, designed and fabricated using the 0.35 m, 3.3 V Bipolar-CMOS-DMOS process BCD6 of STMicroelectronics.