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From: Michael A. Terrell on 13 Jan 2010 12:59 Jim Thompson wrote: > > On Wed, 13 Jan 2010 08:40:14 -0800, "Joel Koltner" > <zapwireDASHgroups(a)yahoo.com> wrote: > > >Did that design make it through fab, Jim, or did the company start imploding > >first? > > It was fabbed at Polarfab. The company began disintegration while > debugging the digital was in progress. > > > > >I thought that combined bipolar/CMOS ("BiFET?") processes were generally > >considered too exotic/unnecessary-due-to-performance-improvements-in-CMOS > >these days? Not so? > > > >---Joel > > Not so for analog. Try making a low noise amplifier with only CMOS. > Try making a TVG that is stable/predictable over temperature. > > For quality, bipolar ROCKS ;-) As long as it takes its medicine on time, every time. ;-) -- Greed is the root of all eBay.
From: Jim Thompson on 13 Jan 2010 13:30 On Wed, 13 Jan 2010 12:59:17 -0500, "Michael A. Terrell" <mike.terrell(a)earthlink.net> wrote: > >Jim Thompson wrote: >> >> On Wed, 13 Jan 2010 08:40:14 -0800, "Joel Koltner" >> <zapwireDASHgroups(a)yahoo.com> wrote: >> >> >Did that design make it through fab, Jim, or did the company start imploding >> >first? >> >> It was fabbed at Polarfab. The company began disintegration while >> debugging the digital was in progress. >> >> > >> >I thought that combined bipolar/CMOS ("BiFET?") processes were generally >> >considered too exotic/unnecessary-due-to-performance-improvements-in-CMOS >> >these days? Not so? >> > >> >---Joel >> >> Not so for analog. Try making a low noise amplifier with only CMOS. >> Try making a TVG that is stable/predictable over temperature. >> >> For quality, bipolar ROCKS ;-) > > > As long as it takes its medicine on time, every time. ;-) I knew a bipolar fellow at Honeywell Satellite Division. He bought one of those Ford trucks where they used plastic tubing for the fuel line. He was so paranoid he carried a hand gun under the seat. It caught fire on his way to Tucson, and the fire department wouldn't go near it because of the gunfire. It burned all the way down to a puddle. His tirade was quite amusing ;-) ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
From: Jim Thompson on 13 Jan 2010 13:44 On Wed, 13 Jan 2010 11:30:18 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com/Snicker> wrote: >On Wed, 13 Jan 2010 12:59:17 -0500, "Michael A. Terrell" ><mike.terrell(a)earthlink.net> wrote: > >> >>Jim Thompson wrote: >>> [snip] >>> >>> For quality, bipolar ROCKS ;-) >> >> >> As long as it takes its medicine on time, every time. ;-) > >I knew a bipolar fellow at Honeywell Satellite Division. He bought >one of those Ford trucks where they used plastic tubing for the fuel >line. > >He was so paranoid he carried a hand gun under the seat. > >It caught fire on his way to Tucson, and the fire department wouldn't >go near it because of the gunfire. > >It burned all the way down to a puddle. > >His tirade was quite amusing ;-) > > ...Jim Thompson Damn! I just remembered his name: "AlwaysWrong" ;-) ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
From: Fred Bartoli on 13 Jan 2010 15:39 Jim Thompson a �crit : > On Wed, 13 Jan 2010 08:40:14 -0800, "Joel Koltner" > <zapwireDASHgroups(a)yahoo.com> wrote: > >> Did that design make it through fab, Jim, or did the company start imploding >> first? > > It was fabbed at Polarfab. The company began disintegration while > debugging the digital was in progress. > >> I thought that combined bipolar/CMOS ("BiFET?") processes were generally >> considered too exotic/unnecessary-due-to-performance-improvements-in-CMOS >> these days? Not so? >> >> ---Joel > > Not so for analog. Try making a low noise amplifier with only CMOS. Have a look at AD8605. Just amazing. > Try making a TVG that is stable/predictable over temperature. > > For quality, bipolar ROCKS ;-) > > ...Jim Thompson -- Thanks, Fred.
From: Jim Thompson on 13 Jan 2010 16:00
On Wed, 13 Jan 2010 21:39:12 +0100, Fred Bartoli <" "> wrote: >Jim Thompson a �crit : >> On Wed, 13 Jan 2010 08:40:14 -0800, "Joel Koltner" >> <zapwireDASHgroups(a)yahoo.com> wrote: >> >>> Did that design make it through fab, Jim, or did the company start imploding >>> first? >> >> It was fabbed at Polarfab. The company began disintegration while >> debugging the digital was in progress. >> >>> I thought that combined bipolar/CMOS ("BiFET?") processes were generally >>> considered too exotic/unnecessary-due-to-performance-improvements-in-CMOS >>> these days? Not so? >>> >>> ---Joel >> >> Not so for analog. Try making a low noise amplifier with only CMOS. > >Have a look at AD8605. Just amazing. > > >> Try making a TVG that is stable/predictable over temperature. >> >> For quality, bipolar ROCKS ;-) >> >> ...Jim Thompson Yep. Judging from the input bias specs, they've got some HUGE input devices there. That's OK for a few OpAmps, but not practical for an SoC (my sonar chip size was ~10mm x 10.5mm). Bipolar devices can be much smaller for the same noise performance. My sonar chip had ~6nV/rt-Hz (including noise from the 1K source impedance) at maximum gain... rising as the gain decreases (TVG). Current noise was ~1pA/rt-Hz. ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. |