Level shift.

Boki · Apr 26, 2006

Hi All,

For a level shift, how about this one:

http://photos1.blogger.com/blogger/1641/2018/1600/level_shift.png

Need any improvement?

Thanks.

Best regards,
Boki.

Jonathan Kirwan · Apr 26, 2006

<snip>
Need any improvement?

Sheesh. Yes.

Jon

Boki · Apr 26, 2006

Jonathan Kirwan å¯«é?“ï¼š

Sheesh. Yes.

Jon

Could you please advice....

Thanks..

P.S Cost is involved.

Best regards,
Boki.

Joerg · Apr 26, 2006

Hello Boki,

For a level shift, how about this one:

http://photos1.blogger.com/blogger/1641/2018/1600/level_shift.png

Need any improvement?

That's not quite going to work. Check Winfield's book AoE, page 669.
Replace the FET in there with a BJT plus base resistor.

Regards, Joerg

Jonathan Kirwan · Apr 26, 2006

<snip>
Replace the FET in there with a BJT plus base resistor.

It's a 2N3906!! It's already a BJT.

Jon

Deefoo · Apr 26, 2006

Jonathan Kirwan said:
It's a 2N3906!! It's already a BJT.

Jon

In AoE, not Boki's design.

--DF

Ken Smith · Apr 27, 2006

Hi All,

For a level shift, how about this one:

http://photos1.blogger.com/blogger/1641/2018/1600/level_shift.png

Need any improvement?

+V ---/\/\/------+------ Out
!
!/c
Vcc ---/\/\/----! NPN
!\e
!
Logic in --------

One more part.