RF transformer design - Electronic Circuits Projects Diagrams Free

froten · 23rd August 2008, 09:09 AM

Hello all,

when designing a class A&AB RF amplifiers (for example for the range from 3Mhz to 30Mhz) using a transformer to match the laod to the transistor output impedence, the ratio of the turns can be easly calculated, but:

Q1) how the actual number of the windings is calculated?
Q2) in case the primary of the transformer is tuned , is the number of turns remains the same for the highest Q value of the tuned circuit?
Q3) what is the prefered transformer to use? is it the balun, transmition line transformer, classic transformer...?

thanx for any help

Mikebits · 23rd August 2008, 09:43 AM

See if these links helps.

http://www.oselectronics.com/downloa...ansformers.pdf

http://www.minicircuits.com/pages/pdfs/howxfmerwork.pdf

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Title	Starter	Forum	Replies	Latest
how to design a transformer	eddie_tech2	Electronic Projects Design/Ideas/Reviews	5	Today 12:27 PM
Circuit Design: Transformer (or Inverter?)	jrod5000	Electronic Projects Design/Ideas/Reviews	5	2nd November 2007 05:51 PM
electronic transformer re-design	caga	Electronic Projects Design/Ideas/Reviews	10	26th December 2005 05:37 PM
how to design ei transformer	butobhones	Electronic Projects Design/Ideas/Reviews	1	3rd August 2005 04:00 PM
How to design linear transformer?	Electronica	General Electronics Chat	1	23rd June 2003 01:35 PM

23rd August 2008, 09:09 AM	(permalink)
froten	RF transformer design Hello all, when designing a class A&AB RF amplifiers (for example for the range from 3Mhz to 30Mhz) using a transformer to match the laod to the transistor output impedence, the ratio of the turns can be easly calculated, but: Q1) how the actual number of the windings is calculated? Q2) in case the primary of the transformer is tuned , is the number of turns remains the same for the highest Q value of the tuned circuit? Q3) what is the prefered transformer to use? is it the balun, transmition line transformer, classic transformer...? thanx for any help

23rd August 2008, 09:43 AM	(permalink)
Mikebits	See if these links helps. http://www.oselectronics.com/downloa...ansformers.pdf http://www.minicircuits.com/pages/pdfs/howxfmerwork.pdf __________________ Forget injuries, never forget kindnesses. Last edited by Mikebits; 23rd August 2008 at 09:46 AM.