List of DIY Electronics Engineering Projects

COMPARE RC, DIRECT AND TRANSFORMER COUPLING






Difference Between Three Common Couplings

sl.no. Characteristics RC Coupling Transformer Coupling Direct Coupling
1. Size Small Large and Bulky Very Small
2. Cost Small Costlier Very Small
3. Frequency Response Excellent in Audio Frequency Poor Best
4. Impedence Matching Not Good Excellent Good
5. Application Voltage Amplification Power Amplification Low Frequency Signal Amplification


---------------------------------------------------------

RC COUPLING

---------------------------------------------------------

Rc Coupling is the most Commonly used Coupling Between the two stages of a cascaded or multistage amplifier because it is cheaper in cost and Very compact circuit and provides excellent frequency response.

Eg:- Rc Coupled Amplifier


---------------------------------------------------------

IMPEDENCE COUPLING OR TRANSFORMER COUPLING

---------------------------------------------------------

Impedence Coupling results in more efficient amplification because no signal power is wasted in Inductor L.
Such Coupling has the drawback of being larger, Heavier and Costlier than the RC COUPLING. Impedence Coupling is rarely used beyond audio range.

---------------------------------------------------------

DIRECT COUPLING

---------------------------------------------------------

Direct coupling is essential for Very low frequency applications Such as photoelectric current.
It has got advantages of Simple and Very cheap circuit arrangement, outstanding ability to amplify low frequency signals.

The Drawbacks of Direct Coupling includes Poor Temperature stability and unsuitability for amplification of high frequency signals.

Direct coupled amplifiers are used When the load is Directly in series with the Output terminal of the active circuit element.

BACK TO ELECTRONICS HOME



Tittu Thomas

Author & Editor

I'm Tittu Thomas, An Electronics and Communication Engineer from India, Kerala. I love doing hobby electronics circuits, blogging, programming, etc. Started this blog while doing my B-Tech degree under CUSAT university.



0 comments so far:

Post a Comment

Social Time

Facebook
Like Us
Google Plus
Follow Us
Twitter
Follow Us
Pinterest
Follow Us

Subscribe to our newsletter

(Get fresh updates in your inbox. Unsubscribe at anytime)