Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics 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

digital volume control circuit using CD 4067

Status
Not open for further replies.
rajaram04

rajaram04

Advanced Member level 3
Joined
Jun 17, 2012
Messages
871
Helped
6
Reputation
12
Reaction score
5
Trophy points
1,298
Location
earth
Activity points
7,687
Hello sir
I got a ciruit diagram for single channel digital volume control
so would it work ? if yes then how analog signals travel through i.c. ???

clip_image002.jpg
 

It is probably the Worlds most complicated volume control but yes, it should work.

The CD4067 is a 16:1 analog multiplexer, basically the binary value 0000 through 1111 on the ABCD pins turns on one of the 16 switches, connecting one of the pins along the bottom to the common pin (pin 1). The volume is divided into 16 steps by the resistors R9 to R23 and one of those steps is connected to the output.

Brian.
 

betwixt said:
It is probably the Worlds most complicated volume control but yes, it should work.

The CD4067 is a 16:1 analog multiplexer, basically the binary value 0000 through 1111 on the ABCD pins turns on one of the 16 switches, connecting one of the pins along the bottom to the common pin (pin 1). The volume is divided into 16 steps by the resistors R9 to R23 and one of those steps is connected to the output.

Brian.
Click to expand...




hmm i see . . kkk

well can we use the combinational 16 steps by the resistors R9 to R23 manually to create our own design ?
i mean shall we get a smooth increasing & decreasing volume levels after designing final stage ?
so may i bring all this resistor value mentioned here ?
 

The volume will only have 16 fixed levels as decided by the resistor values. For smooth volume changes you need at least twice that many and preferably much more. My home stereo here has 128 steps. You can buy "digital potentiometers" which do all this for you in one IC.

Brian.
 

betwixt said:
The volume will only have 16 fixed levels as decided by the resistor values. For smooth volume changes you need at least twice that many and preferably much more. My home stereo here has 128 steps. You can buy "digital potentiometers" which do all this for you in one IC.

Brian.
Click to expand...



kk well forget about that

so for some fix levels i may choose the given values or not ???????

i need a few steps as shown actually
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top