ENGINEERING.com has updated it's forum.  To post a question please visit the new Ask@ Forum.   

With a database of over 10000 questions the library will remain available for an extended period.
Q&A


SANKAR GANESH		 What is the difference between AC GND,and DC GND. View All


16 years ago - 8 months left to answer. - 1 response - Report Abuse
Respond to question
    0      [lnkReport]        0       0       
Share |
  Responses

Miranda
 Although there can be times in power circuits where AC ground is separate from DC ground, you are probably confusing the terms with AC-grounded and DC-grounded. If a circuit is grounded through a capacitor it is referred to as AC-grounded because only AC signals can pass through the cap to ground, DC levels are blocked. Whereas if a circuit is such that DC current can flow to ground, such as through a resistor, then it is considered to be DC-grounded. A classic example would be a non-inverting op amp configured with the divider feedback resistor connected through a capacitor to ground (AC-grounded), or directly to ground (DC-grounded).

This is similar to AC-coupled and DC-coupled, where a capacitor is used between two circuits to block DC and allow only the AC component to pass. An example would be one op amp circuit, the first stage, driving the second stage through a coupling capacitor (AC-coupled), or directly connected through a resistor without a coupling capacitor (DC-coupled)

16 years ago

Source:


  0     0         

ENGINEERING.com does not provide engineering advice. The Ask@ service is a forum for members to exchange ideas relating to the world of engineering. We caution users not to accept any responses that they receive without further validation, and not to rely on any engineering advice that they may get from other members of the Ask@ forum. ENGINEERING.com specifically disclaims any obligation to validate or verify any information posted within the Ask@ service. ENGINEERING.com encourages users to seek the services of a professional engineer for any engineering advice they may require.