公开(公告)号：US6157335A

公开(公告)日：2000-12-05

申请号：US126090

申请日：1998-07-30

申请人： Hisao Suzuki ,  Norikazu Fushimi

发明人： Hisao Suzuki ,  Norikazu Fushimi

IPC分类号： G05F3/24 ,  H03F1/30 ,  H03M1/68 ,  H03M1/76 ,  H03M1/78

CPC分类号： H03M1/682 ,  G05F3/242 ,  H03F1/301 ,  H03M1/765

摘要： A voltage generating circuit for a digital to analog converter divides a potential difference between a high potential supply and a low potential supply. The voltage generating circuit includes a voltage dividing circuit having three impedance elements connected in series between the high potential supply and the low potential supply. A first current source is connected to a node between the first two series connected impedance elements and a second current source is connected to a node between the second and third series connected impedance elements. The first and second current source supply first and second currents having the same value to the first and second nodes, respectively. A control circuit compares a reference voltage with a selected voltage output from the voltage dividing circuit and controls the first and second currents supplied by the first and second current source so that the selected voltage is made equal to the reference voltage.

摘要翻译： 用于数模转换器的电压产生电路将高电位电源和低电位电源之间的电位差分开。 电压产生电路包括具有串联连接在高电位电源和低电位电源之间的三个阻抗元件的分压电路。 第一电流源连接到前两个串联连接的阻抗元件之间的节点，第二电流源连接到第二和第三串联连接的阻抗元件之间的节点。 第一和第二电流源分别向第一和第二节点提供具有相同值的第一和第二电流。 控制电路将参考电压与从分压电路输出的选定电压进行比较，并控制由第一和第二电流源提供的第一和第二电流，使得所选择的电压等于参考电压。