Op Amp Calculations
in [Design]
|
From: Keith Williams on 7 Oct 2005 14:47 In article <oefdk11h47a0f7ultm1lele4lpsf4sfihp(a)4ax.com>, thegreatone(a)example.com says... > On Fri, 07 Oct 2005 18:07:00 GMT, Rich Grise <rich(a)example.net> wrote: > > >On Thu, 06 Oct 2005 13:08:07 -0700, Jim Thompson wrote: > > > >> On Fri, 07 Oct 2005 09:01:41 +1300, Terry Given <my_name(a)ieee.org> > >> wrote: > >> > >>>Jim Thompson wrote: > >>>> On Thu, 06 Oct 2005 15:39:08 GMT, Fred Bloggs <nospam(a)nospam.com> > >>>> wrote: > >> [snip] > >>>> > >>>> That's still insufficient. Good engineering practice would limit base > >>>> drive from the OpAmp AND also the collector current of the 2nd > >>>> transistor. > >>>> > >>>> ...Jim Thompson > >>> > >>>Thanks Jim, thats pretty much what I figured. Its like driving, really. > >>>any fool can drive on a straight, flat road with no traffic and good > >>>visibility. Going round a corner sideways in the pouring rain, with a > >>>logging truck coming towards you, sorts the men from the boys. > >>> > >>>Cheers > >>>Terry > >> > >> I did that once on snow. Nothing like sliding sideways, down a hill > >> yet, and dodging traffic, to put some "age" on you ;-) > >> > >Ever tried fishtailing on the freeway at 55MPH on black ice? That's > >kind of a rush too. ;-) > > > >Cheers! > >Rich > > > > I drove the Pennsylvania Turnpike from west-end-to-east-end one time > with an eery feeling of never quite touching the ground ;-) I drove I80 W->E across PA on about an inch of ice one time. It was raining and freezing so fast that I had to put the defroster on high enough that I had to open the windows so my hair wouldn't catch fire. ;-) We finally broke free of the storm around Stroudsburg after 10 hours of white-knuckle driving. We only had about three hours driving time to get home but the wife said, no (*she* was too tired)! We stayed the night in a hotel, only to fight the storm again the next day. :-( -- Keith
From: Winfield Hill on 7 Oct 2005 14:42 Jim Thompson wrote... > > I drove the Pennsylvania Turnpike from west-end-to-east-end one > time with an eery feeling of never quite touching the ground ;-) When one drives all the way across the country at one go, one gets that feeling at various points. -- Thanks, - Win
From: Winfield Hill on 7 Oct 2005 14:42 Terry Given wrote... >Winfield Hill wrote: >> Rich Grise wrote... >> >>> Dibs on a half share of ROFLMAOPIMP! >> >> PIMP? > > Pee In My Pants.... Aawwaarrkk!! -- Thanks, - Win
From: Jim Thompson on 7 Oct 2005 15:12 On Fri, 7 Oct 2005 14:47:07 -0400, Keith Williams <krw(a)att.bizzzz> wrote: >In article <oefdk11h47a0f7ultm1lele4lpsf4sfihp(a)4ax.com>, >thegreatone(a)example.com says... >> On Fri, 07 Oct 2005 18:07:00 GMT, Rich Grise <rich(a)example.net> wrote: >> >> >On Thu, 06 Oct 2005 13:08:07 -0700, Jim Thompson wrote: >> > >> >> On Fri, 07 Oct 2005 09:01:41 +1300, Terry Given <my_name(a)ieee.org> >> >> wrote: >> >> >> >>>Jim Thompson wrote: >> >>>> On Thu, 06 Oct 2005 15:39:08 GMT, Fred Bloggs <nospam(a)nospam.com> >> >>>> wrote: >> >> [snip] >> >>>> >> >>>> That's still insufficient. Good engineering practice would limit base >> >>>> drive from the OpAmp AND also the collector current of the 2nd >> >>>> transistor. >> >>>> >> >>>> ...Jim Thompson >> >>> >> >>>Thanks Jim, thats pretty much what I figured. Its like driving, really. >> >>>any fool can drive on a straight, flat road with no traffic and good >> >>>visibility. Going round a corner sideways in the pouring rain, with a >> >>>logging truck coming towards you, sorts the men from the boys. >> >>> >> >>>Cheers >> >>>Terry >> >> >> >> I did that once on snow. Nothing like sliding sideways, down a hill >> >> yet, and dodging traffic, to put some "age" on you ;-) >> >> >> >Ever tried fishtailing on the freeway at 55MPH on black ice? That's >> >kind of a rush too. ;-) >> > >> >Cheers! >> >Rich >> > >> >> I drove the Pennsylvania Turnpike from west-end-to-east-end one time >> with an eery feeling of never quite touching the ground ;-) > >I drove I80 W->E across PA on about an inch of ice one time. It was raining >and freezing so fast that I had to put the defroster on high enough that I had >to open the windows so my hair wouldn't catch fire. ;-) We finally broke free >of the storm around Stroudsburg after 10 hours of white-knuckle driving. We >only had about three hours driving time to get home but the wife said, no >(*she* was too tired)! We stayed the night in a hotel, only to fight the storm >again the next day. :-( Well, if we're going to play "Can you top that" ;-) Drove across Oklahoma one winter in so much cold rain that I had to defrost using the air conditioning :-( ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
From: Keith Williams on 7 Oct 2005 15:48
In article <v2idk158isrmlagtf0dicrf78mm2o20dvt(a)4ax.com>, thegreatone(a)example.com says... > On Fri, 7 Oct 2005 14:47:07 -0400, Keith Williams <krw(a)att.bizzzz> > wrote: > > >In article <oefdk11h47a0f7ultm1lele4lpsf4sfihp(a)4ax.com>, > >thegreatone(a)example.com says... > >> On Fri, 07 Oct 2005 18:07:00 GMT, Rich Grise <rich(a)example.net> wrote: > >> > >> >On Thu, 06 Oct 2005 13:08:07 -0700, Jim Thompson wrote: > >> > > >> >> On Fri, 07 Oct 2005 09:01:41 +1300, Terry Given <my_name(a)ieee.org> > >> >> wrote: > >> >> > >> >>>Jim Thompson wrote: > >> >>>> On Thu, 06 Oct 2005 15:39:08 GMT, Fred Bloggs <nospam(a)nospam.com> > >> >>>> wrote: > >> >> [snip] > >> >>>> > >> >>>> That's still insufficient. Good engineering practice would limit base > >> >>>> drive from the OpAmp AND also the collector current of the 2nd > >> >>>> transistor. > >> >>>> > >> >>>> ...Jim Thompson > >> >>> > >> >>>Thanks Jim, thats pretty much what I figured. Its like driving, really. > >> >>>any fool can drive on a straight, flat road with no traffic and good > >> >>>visibility. Going round a corner sideways in the pouring rain, with a > >> >>>logging truck coming towards you, sorts the men from the boys. > >> >>> > >> >>>Cheers > >> >>>Terry > >> >> > >> >> I did that once on snow. Nothing like sliding sideways, down a hill > >> >> yet, and dodging traffic, to put some "age" on you ;-) > >> >> > >> >Ever tried fishtailing on the freeway at 55MPH on black ice? That's > >> >kind of a rush too. ;-) > >> > > >> >Cheers! > >> >Rich > >> > > >> > >> I drove the Pennsylvania Turnpike from west-end-to-east-end one time > >> with an eery feeling of never quite touching the ground ;-) > > > >I drove I80 W->E across PA on about an inch of ice one time. It was raining > >and freezing so fast that I had to put the defroster on high enough that I had > >to open the windows so my hair wouldn't catch fire. ;-) We finally broke free > >of the storm around Stroudsburg after 10 hours of white-knuckle driving. We > >only had about three hours driving time to get home but the wife said, no > >(*she* was too tired)! We stayed the night in a hotel, only to fight the storm > >again the next day. :-( > > Well, if we're going to play "Can you top that" ;-) Oh, yeah! > Drove across Oklahoma one winter in so much cold rain that I had to > defrost using the air conditioning :-( You had an Oklahoma?! Wait... (The AC in my truck is on whenever the defroster is on) -- Keith |