联系我们

与泰克代表实时聊天。 工作时间:上午 9:00 - 下午 5:00(太平洋标准时间)。

电话

致电我们 1-800-833-9200

工作时间:上午9:00-下午5:00(太平洋标准时间)

下载

下载手册、产品技术资料、软件等:

下载类型
型号或关键字

反馈

What value bias-current resistors do I use when I am making a differential connection to a data acqu

问题:

What value bias-current resistors do I use when I am making a differential connection to a data acqu

答案:

Differential inputs are more complex to use and are more expensive than single-ended inputs, but they do offer better noise immunity. The connection to a differential channel must be handled with care in order to make a proper measurement. Differential inputs generally require the addition of resistors to provide bias-current return. You can determine the value of the bias-current resistor from the value of the source resistance using the following relationships:

* When the source resistance is greater than 100 ohms: use two bias-current resistors, one connected from input high to low-level ground and the second connected from input low to low-level ground. The resistance of each of the two bias return resistors must equal 2,000 times the source resistance;

* When the source resistance is less than 100 ohms: connect the bias return resistance from input high to low-level ground. The resistance of the bias return resistor must be greater than 1,000 times the source resistance.


此常见问题适用于:

无产品系列

产品:

常见问题 ID 70656

查看所有常见问题 »