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1. 发明授权

US07382153B2 On-chip resistor calibration for line termination 有权
标题翻译：用于线路端接的片上电阻校准
公开(公告)号：US07382153B2
公开(公告)日：2008-06-03
申请号：US11459880
申请日：2006-07-25
申请人： Quing Ou-yang , Quan Yu , Ming Qu
发明人： Quing Ou-yang , Quan Yu , Ming Qu
IPC分类号： H03K17/16
CPC分类号： H03K19/0005
摘要： A circuit for calibrating a resistance value on an integrated circuit includes a resistor network, a reference voltage generator, a comparator, a servo loop, and a shift register. The resistor network includes a plurality of resistor and switch pairs in parallel. The resistor network further includes a servo resistor in series with a servo resistor switch such that the servo resistor and servo resistor switch are in parallel with the plurality of resistor and switch pairs. The servo loop generates a shift register gating signal and includes a current sample register for storing a current comparator output data value and a previous sample register for storing a previous comparator output data value. The shift register, upon receipt of a shift register gating signal at a first state, inputs the current comparator output data value to shift data bits through the shift register.
摘要翻译：用于校准集成电路上的电阻值的电路包括电阻网络，参考电压发生器，比较器，伺服环路和移位寄存器。电阻网络包括并联的多个电阻器和开关对。电阻网络还包括与伺服电阻器开关串联的伺服电阻器，使得伺服电阻器和伺服电阻器开关与多个电阻器和开关对并联。伺服环路产生移位寄存器门控信号，并包括用于存储当前比较器输出数据值的当前采样寄存器和用于存储先前比较器输出数据值的先前采样寄存器。移位寄存器在第一状态下接收到移位寄存器选通信号时，输入当前比较器输出数据值以通过移位寄存器移位数据位。

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