Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

How to implemet Mixer practically

Status
Not open for further replies.

dilan2005

Member level 4
Joined
Jul 22, 2007
Messages
75
Helped
8
Reputation
16
Reaction score
2
Trophy points
1,288
Activity points
1,837
transistor mixer circuit

i have so many notes ,and theories:

"use a mixer with in put x(t) and Acos(ft) and out put of x(t)XAcos(ft) is the x(t) signal shifted by f in frequency domain",

any how i want to know what are the practical circuit to implement this mixer(or the multiplier)?


PLEASE !!!!!

thanx
 

ieropsaltic

Full Member level 4
Joined
Sep 25, 2006
Messages
199
Helped
64
Reputation
128
Reaction score
18
Trophy points
1,298
Activity points
2,595
single transistor mixer

Yes, the output spectrum will be shifted by f at frequency domain.
For practical mixer implementation, one way is to use the non-linearity of certain devices as diodes or transistors to generate |n*f1±m*f2| where n, m are integers and f1, f2 are the required drequenciese ti be mixed together.
Another way to perform the mixing function is to use the carrier frequency to drive switches to reverse the polarity of the input signal.
For more information concerning mixer circuits you may refer to "RF microelectronics" by Behzad Razavi, chapter 6.
 

    dilan2005

    points: 2
    Helpful Answer Positive Rating

dilan2005

Member level 4
Joined
Jul 22, 2007
Messages
75
Helped
8
Reputation
16
Reaction score
2
Trophy points
1,288
Activity points
1,837
transistor mixer

thanks.
do you have any circuit that i can build.


simple one.
 

khouly

Advanced Member level 5
Joined
Oct 20, 2003
Messages
2,368
Helped
460
Reputation
914
Reaction score
100
Trophy points
1,343
Location
EGYPT
Activity points
13,244
one transistor mixer

check single transistor mixer , it is qyite simple

khouly
 

m10mn

Junior Member level 1
Joined
Oct 13, 2006
Messages
17
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,368
single transistor mixer circuits

by using a single transistor and biasing two of the ports you can easily make a mixer(which is a king of multiplier).
 

dilan2005

Member level 4
Joined
Jul 22, 2007
Messages
75
Helped
8
Reputation
16
Reaction score
2
Trophy points
1,288
Activity points
1,837
2 input mixer circuits

Please can any one give me a sample schematic of one transistor mixer?

thx
 

dilan2005

Member level 4
Joined
Jul 22, 2007
Messages
75
Helped
8
Reputation
16
Reaction score
2
Trophy points
1,288
Activity points
1,837
mixer circuits using transistors

I need RF mixer(Multiplyer,actually multiply two wave forms),not a audio mixer

A=x(t)
B=Ecos(2ft)
AXB<----i want this

tanks
 

A.Anand Srinivasan

Advanced Member level 5
Joined
Oct 15, 2005
Messages
1,804
Helped
257
Reputation
514
Reaction score
39
Trophy points
1,328
Location
India
Activity points
10,680
simple transistor mixer circuit

dude one of the circuits that i posted (the FET model) have 2 inputs and you just have to feed the two waves that you are talking about....

hope it is helpful....
 

dilan2005

Member level 4
Joined
Jul 22, 2007
Messages
75
Helped
8
Reputation
16
Reaction score
2
Trophy points
1,288
Activity points
1,837
simple transistor mixer schematic

actually i need a multiplier,not adder
(in Rf terms we called mixer for multiplier)

Added after 1 minutes:

a good name is "modulator"
sorry for my wrong words in earlier posts
thx
 

firewind

Member level 1
Joined
Jun 7, 2005
Messages
36
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Location
Milky Way
Activity points
1,535
circuit schematic of a thx mixer

if you're trying to build on transistor level, I normally design my mixer with a differential amplifier type.
 

Abhishekabs

Advanced Member level 3
Joined
Jan 12, 2007
Messages
758
Helped
115
Reputation
230
Reaction score
44
Trophy points
1,308
Location
India
Activity points
5,538
transistor mixer circuits

See whether this tutorial help you
This is a microwave mixer.
Abhishekabs
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top