公开(公告)号：US06985030B2

公开(公告)日：2006-01-10

申请号：US10818791

申请日：2004-04-06

申请人： Yasuhide Shimizu ,  Hideyuki Katsuta ,  Yukitoshi Yamashita ,  Nobuhiko Yokoyama

发明人： Yasuhide Shimizu ,  Hideyuki Katsuta ,  Yukitoshi Yamashita ,  Nobuhiko Yokoyama

IPC分类号： H03F1/02 ,  H03M1/12

CPC分类号： H03F3/45192 ,  H03F3/45188 ,  H03F3/45771 ,  H03F2203/45651 ,  H03F2203/45652 ,  H03F2203/45696 ,  H03F2203/45702 ,  H03F2203/45726 ,  H03M1/148

摘要： A differential amplifier has an in-phase input terminal to which an input signal is applied through a first switching unit, an anti-phase input terminal to which a reference signal is applied through a second switching unit, and a third switching unit between the in-phase and anti-phase input terminals. The potential difference between the in-phase and anti-phase input terminals is differentially amplified by setting the first and second switching units to be on and the third switching unit to be off. Also, the in-phase and anti-phase input terminals are short-circuited to have a high impedance by setting the first and second switching units to be off and the third switching unit to be on.

摘要翻译： 差分放大器具有同相输入端子，通过第一开关单元向其施加输入信号，通过第二开关单元向其施加参考信号的反相输入端子，以及第三开关单元 相和反相输入端子。 通过将第一和第二开关单元设置为导通而使第三开关单元断开，同相和反相输入端子之间的电位差被差分放大。 此外，通过将第一和第二开关单元设置为关闭并且第三开关单元导通，同相和反相输入端子被短路以具有高阻抗。