sample and hold circuit

Go To Last Post
5 posts / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

I have a DAC that can go 30kHz, has 1 output only.  What would it take to output in stereo at 15kHz?  Would it work out output both stereo channels on the dac and use a sample and hold circuit?  I was thinking 2 caps with pfets that alternate the dac output between the 2 channels.  I figured someone here has done this before.

This topic has a solution.
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

274,207,281-1 The largest known Mersenne Prime

Measure twice, cry, go back to the hardware store

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

I was thinking 2 caps with pfets that alternate the dac output between the 2 channels.

MCP4921, single channel:  $2.10/qty. 1; $1.50/qty. 100

MCP4922, dual channel:  $2.75/qty. 1; $2.00/qty. 100

 

So, for less than $1 to add the second channel and no additional switching parts, is your quest worthwhile?

 

I'd guess that you can get stereo audio amps also in that $2 range.

 

Chan did a stereo sound player with just a Tiny85:

http://elm-chan.org/works/sd8p/r...

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

This reply has been marked as the solution. 
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Just feed mono to two speakers - 98% of people won't notice the difference...

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

awneil wrote:

Just feed mono to two speakers - 98% of people won't notice the difference...

 

You know me too well.

274,207,281-1 The largest known Mersenne Prime

Measure twice, cry, go back to the hardware store