Re: microphones with very low current consumption

On 7 פברואר, 16:46, Syd Rumpo <use...@xxxxxxxxxxxxxx> wrote:
On 07/02/2012 13:29, elil wrote:









Dear,

I'm looking for ideas about microphones with very low current
consumption (say, less than few uA) and low cost(say less than $1).
Electret microphone elements typically include a JFET as an impedance
converter and the operating current of this JFET is typically 0.1 to
0.5 mA. As far as I know, there are microphones without JFET, so it
might be one of my alternatives.
Recently I checked yet another 2 options: Magnetic microphone and
Dynamic receiver. But once I had heard the prices for these parts, I
have stopped thinking about them.

Any suggestions and comments will be highly appreciated.

Best regards,
Eli

Piezoelectric (crystal) microphone.

Cheers
--
Syd

....I already have been looking for such components but still haven't
found anything. Don't forget another requirement-low cost
.

Relevant Pages

  • Re: microphones with very low current consumption
    ... Electret microphone elements typically include a JFET as an impedance ... converter and the operating current of this JFET is typically 0.1 to ...
    (comp.arch.embedded)
  • Re: microphones with very low current consumption
    ... Electret microphone elements typically include a JFET as an impedance ... converter and the operating current of this JFET is typically 0.1 to ...
    (comp.arch.embedded)
  • Re: microphones with very low current consumption
    ... Electret microphone elements typically include a JFET as an impedance ... Don't forget another requirement-low cost ...
    (comp.arch.embedded)
  • Re: microphones with very low current consumption
    ... Electret microphone elements typically include a JFET as an impedance ... And you're really sure the reason microphone manufacturers put those JFETs in there doesn't apply to you? ... Are you 100% fire-proof certain that you can live with the impedance you would have without that conversion? ... specifying a current consumption all by itself is somewhat devoid of meaning. ...
    (comp.arch.embedded)
  • Re: microphones with very low current consumption
    ... impedance converter and the operating current of this JFET is ... Recently I checked yet another 2 options: Magnetic microphone and ... Or a bare electret element, to which you attach your own JFET, ... Early telephone amplifiers actually used a sounder connected to a carbon ...
    (comp.arch.embedded)