公开(公告)号：US06369652B1

公开(公告)日：2002-04-09

申请号：US09571089

申请日：2000-05-15

申请人： Huy M. Nguyen ,  Benedict C. Lau ,  Roxanne T. Vu

发明人： Huy M. Nguyen ,  Benedict C. Lau ,  Roxanne T. Vu

IPC分类号： H03F345

CPC分类号： H03F3/45766 ,  H03F3/45183 ,  H03F2203/45471 ,  H03F2203/45686 ,  H03F2203/45696 ,  H03F2203/45702 ,  H03K5/2481 ,  H03L7/0812

摘要： A differential amplifier has unequal resistance in its legs that compensates for an unequal current flow through the legs during a logic zero data input compared to logic one data input. The unequal resistance may be provided by adding a resistor in parallel to the leg that carries greater current during amplification, lowering the resistance in that leg and also the voltage that is output from that leg. Alternatively, a variable resistance may be provided to at least one of the legs to compensate for current inequalities between the legs. The variable resistance may be provided by a transistor that is controlled by a signal indicating process, voltage and/or temperature conditions of the amplifier and adjacent circuitry. Transistors may be employed in both legs as well as in a current source for the amplifier, providing balanced current regulation for the amplifier. Such current compensated differential amplifiers may be employed for various functions, for example as input receivers or delay elements in high frequency memory systems.

摘要翻译： 与逻辑1数据输入相比，差分放大器在其逻辑零数据输入期间，其腿部具有不相等的电阻，其补偿与逻辑零数据输入中不平衡的电流。 可以通过在放大期间增加一个并联的电阻器来提供不平等的电阻，该电阻器在放大期间承载更大的电流，降低该支路中的电阻以及从该支路输出的电压。 或者，可以向至少一个腿提供可变电阻以补偿腿之间的当前不平等。 可变电阻可以由由指示放大器和相邻电路的处理，电压和/或温度条件的信号控制的晶体管提供。 晶体管可以用于两个支路以及用于放大器的电流源，为放大器提供平衡的电流调节。 这种电流补偿差分放大器可用于各种功能，例如作为高频存储器系统中的输入接收器或延迟元件。