12-Bit 500MHz Digital-to-Analog Converter Based on Highly Matching Current Mirror

• Main Authors: Yu-Kai Dai, 戴于凱
• Other Authors: Poki Chen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/21554786935199671737

碩士 === 國立臺灣科技大學 === 電子工程系 === 102 === In recent years, communication systems require high speed and resolution Digital-to-Analog Converter. For high speed operation, the work employed a current-steering and differential pair architecture. In circuit part, output impedance is restricted by the low supply voltage and MOS short-channel effect. Therefore, designing an accurate current source array is extremely difficult. The Digital-to-Analog Converter with a highly matching current mirror circuit is proposed in this work. The precision of this current source array can be obtained. The proposed 500MHz 12-bit DAC is implemented in 0.18μm CMOS 1P6M technology with the supply voltage of 1.8V. The simulation results show the INL is better than and DNL is between -0.8～+0.02 LSB. Power comsumption of this DAC with a sigle 1.8V supply is 29.8mW. The active area is merely 0.8 mm2.