排序方式: 共有190条查询结果,搜索用时 15 毫秒
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该文基于65 nm CMOS低漏电工艺,设计了一种用于触摸屏SoC的8通道10位200 kS/s逐次逼近寄存器型(Successive Approximation Register,SAR) A/D转换器(Analog-to-Digital Converter,ADC) IP核。在D/A转换电路的设计上,采用7MSB (Most-Significant-Bit) + 3LSB (Least-Significant-Bit) R-C混合D/A转换方式,有效减小了IP核的面积,并通过采用高位电阻梯复用技术有效减小了系统对电容的匹配性要求。在比较器的设计上,通过采用一种低失调伪差分比较技术,有效降低了输入失调电压。在版图设计上,结合电容阵列对称布局以及电阻梯伪电阻包围的版图设计方法进行设计以提高匹配性能。整个IP核的面积为322m267m。在2.5 V模拟电压以及1.2 V数字电压下,当采样频率为200 kS/s,输入频率为1.03 kHz时,测得的无杂散动态范围(Spurious-Free Dynamic Range,SFDR)和有效位数(Effective Number Of Bits,ENOB)分别为68.2 dB和9.27,功耗仅为440W,测试结果表明本文ADC IP核非常适合嵌入式系统的应用。 相似文献
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一种新型低压高精度CMOS电流源 总被引:3,自引:0,他引:3
采用低压与温度成正比基准源和衬底驱动低压运算放大器电路,设计了一种新型的低压高精度CMOS电流源电路,并采用TSMC 0.25μm CMOS Spice模型进行了电源特性、温度特性及工艺偏差的仿真.在室温下,当电源电压处于1.0~1.8V时,低压电流源输出电流Iout约为12.437~12.497μA;当温度在0~47℃范围内,输出电流为12.447μA;各种工艺偏差条件下的最大绝对偏差为0.54μA,与典型工艺模型下的相对偏差为4.34%. 相似文献
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利用二维器件模拟器MEDICI提取出重掺杂外延型衬底的电阻宏简化模型,所需的6个参数均可通过器件模拟得到,能够精确表征混合信号集成电路中的衬底噪声特性。基于0.25μm CMOS工艺所建立的电阻宏模型,设计了简单的混合信号电路进行应用验证,证明了该模型能够有效表征混合信号集成电路的衬底噪声。 相似文献
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This paper presents a 10-bit 100-MSample/s analog-to-digital(A/D) converter with pipelined folding architecture.The linearity is improved by using an offset cancellation technique and a resistive averaging interpolation network.Cascading alleviates the wide bandwidth requirement of the folding amplifier and distributed interstage track/hold amplifiers are used to realize the pipeline technique for obtaining high resolution.In SMIC 0.18μm CMOS,the A/D converter is measured as follows:the peak integral nonlinearity and differential nonlinearity are±0.48 LSB and±0.33 LSB,respectively.Input range is 1.0 VP-P with a 2.29 mm2 active area.At 20 MHz input @ 100 MHz sample clock,9.59 effective number of bits,59.5 dB of the signal-to-noise-and-distortion ratio and 82.49 dB of the spurious-free dynamic range are achieved.The dissipation power is only 95 mW with a 1.8 V power supply. 相似文献
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Based on the 0.6μm BCDMOS process a hysteretic-current-control mode white light LED driver with high accuracy and efficiency is presented.The driver can work with a 6-40 V power supply,the maximum output current is up to 1.0 A,the maximum switching frequency is up to 1 MHz,the output current error is less than±5%,and the efficiency is greater than 80%.The circuit details of the high-side-current sensor and high-speed comparator,which greatly affect the accuracy of the whole driver,are emphasized.Then,the simulation and test results of this work are presented. 相似文献