公开(公告)号：US4875042A

公开(公告)日：1989-10-17

申请号：US2328

申请日：1987-01-12

申请人： Seiji Oku ,  Tooru Shimamura ,  Kazutomo Naganawa ,  Toshiya Tanamura

发明人： Seiji Oku ,  Tooru Shimamura ,  Kazutomo Naganawa ,  Toshiya Tanamura

IPC分类号： G01K1/02

CPC分类号： G01K1/026

摘要： This multi channel temperature controller includes several temperature sensors, an electronic multiplexer which receives output signals from these temperature sensors and which sequentially supplies these signals to its output according to the switching action of a selection signal, and an amplifier which receives the output of the electronic multiplexer. Thereby, noise such as due to thermal electro motive force generated in the contacts of prior art sets of reed relays for switching over such temperature sensor output signals can be eliminated. Further, optionally, there may be provided several input circuits, one interposed between each of these temperature sensors and the electronic multiplexer, and each including a capacitor which has electrostatic capacitance substantially greater than the electrostatic capacitance existing between its input circuit and the corresponding temperature sensor. Thereby, common mode voltage noises are eliminated or minimized.

摘要翻译： 该多通道温度控制器包括多个温度传感器，电子多路复用器，其接收来自这些温度传感器的输出信号，并且根据选择信号的切换动作将这些信号依次提供给其输出;以及放大器，其接收电子 复用器。 因此，可以消除由于在现有技术的用于切换这种温度传感器输出信号的簧片继电器组的触点中产生的热电动力引起的噪声。 此外，可选地，可以提供多个输入电路，一个插入在这些温度传感器和电子多路复用器中的每一个之间，并且每个输入电路包括电容器，该电容器的静电电容基本上大于其输入电路和相应的温度传感器之间存在的静电电容 。 从而消除或最小化共模电压噪声。