基本信息:
- 专利标题： Circuit for providing a controlled resistance
- 专利标题（中）：Schaltung zur Schaffung eines gesteuerten Widerstands。
- 申请号：EP87301455.9 申请日：1987-02-19
- 公开(公告)号：EP0233786A2 公开(公告)日：1987-08-26
- 发明人： Evans, William Alun , Rowlands, Stuart Lee
- 申请人： HAVEN AUTOMATION LIMITED
- 申请人地址： Cwmdu Industrial Estate Gendros Swansea SA5 5LQ Wales GB
- 专利权人： HAVEN AUTOMATION LIMITED
- 当前专利权人： HAVEN AUTOMATION LIMITED
- 当前专利权人地址： Cwmdu Industrial Estate Gendros Swansea SA5 5LQ Wales GB
- 代理机构： Jenkins, Peter David
- 优先权： GB8604125 19860219
- 主分类号： G06G7/62
- IPC分类号： G06G7/62
摘要：
A circuit for providing a controlled resistance, the apparatus comprising a pair of terminals for input of an excitation current, variable resistance means connected in the current path between the terminals, means for deriving a first signal representing the value of the voltage appearing across the terminals, means for deriving a second signal representing the value of the excitation current, means for generating a third signal representing a selected value of resistance to be provided between the pair of terminals, means for comparing the ratio of the first and second signals with the value of the third signal to derive a difference signal, and means for applying the difference signal to cause the variable resistance means to change in value such that said ratio tends towards exact equality with the selected value of resistance.
摘要（中）：
一种用于提供受控电阻的电路，该电路包括用于输入激励电流的一对端子，连接在端子之间的电流通路中的可变电阻装置，用于导出表示跨过端子的电压值的第一信号的装置 用于产生代表激励电流值的第二信号的装置，用于产生代表在所述一对终端之间提供的电阻的选定值的第三信号的装置，用于将第一和第二信号的比率与值 的第三信号以导出差分信号;以及用于施加差分信号以使可变电阻装置改变值的装置，使得所述比率与所选择的电阻值趋向于精确相等。
公开/授权文献:
- EP0233786A3 Circuit for providing a controlled resistance 公开/授权日：1990-04-25
IPC结构图谱:
| G | 物理 |
| --G06 | 计算；推算；计数 |
| ----G06G | 模拟计算机 |
| ------G06G7/00 | 通过改变电量或磁量执行计算操作的器件 |
| --------G06G7/12 | .用于执行计算操作的装置，例如，为执行计算操作专用的放大器 |
| ----------G06G7/62 | ..用于电系统或设备的 |