Switching 4-Signal Souces using 4016 TDM

[vinodquilon]

See the attachment...
**broken link removed**

It presents switching of 2 sources using CMOS CD4016 Analog Switch into a single channel.

My question is, how can I switch 4 sources using a 'single clock'.

Here is my 'complex' interpretation,
Use clock to run one mod-4 asynchronous counter with outputs Q0, Q1.
Then construct one 'logic circuit' to drive 4016 according to the truth table given in the

attachment.

Can anybody suggests some easy tricks ?

 

[dick_freebird]

The 4017 Johnson counter might be a handy way to go, if the
output polarity is right (otherwise, might have to use some of
those spare inverters). Believe you can short-count the 4017
by wrapping outputs back to the reset (?). With the Johnson
output format you don't have to demux / decode.