【摘要】 提出了一种新型电荷传输型电路 .电路由 MOS管及电容组成 ,在计算相关量的匹配度时 ,先计算出相关量的差值 ,然后将此差值放大 ,使电路的计算精度提高 .采用电荷传输型电路的方式 ,大大降低了电路的功耗 .同时 ,此电路还具有 MOS管阈值偏差自动修正功能 ,最大限度降低了制造工艺带来的误差 .1.5μm双层多晶硅双层铝布线标准 CMOS工艺所投样片的测试结果表明 ,工作频率为 5 0 Hz时 ,功耗仅为 12μW.更多还原

【Abstract】 A novel matching cell circuitry using charge transfer circuit technique for high precision correlation calculation is presented.The cell calculates the absolute value of the difference between two analog input voltages and amplifies the result.Amplification gain can be designed by the capacitance size in the cell and threshold voltage mismatch can be canceled automatically,thus high precision operation of the circuit is achieved.The circuit can be operated with low power dissipation of about 12μW at a frequency of 50MHz.Because of its simple structure and small silicon area,the matching cell is suitable to realize the correlation dealing with many template vectors that have many elements in a chip.更多还原