Tom and I shared a cubicle at Motorola Semiconductor Products Division during the early to mid-60's. ...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at
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| 1962 |
Thinking outside the box... producing elegant solutions.
"It is not in doing what you like, but in liking what you do that is the secret of happiness." -James Barrie
Slowman? Are you exhibiting your true ignorance or just seeking podium time ?>:-} ...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at
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| 1962 |
Thinking outside the box... producing elegant solutions.
"It is not in doing what you like, but in liking what you do that is the secret of happiness." -James Barrie
Many of my creations (AND Tom's) were due to the fact that we constantly battered (and/or taunted) each other's designs, resulting in superb outcomes.
The "Thompson" current mirror in this link...
came about from a "coffee-bet" with Tom that I couldn't possibly make a lateral-PNP current mirror with a stable output.
Likewise...
was a joint effort.
And many others.
(I'm referenced on page 14-15 of Tom's "Intuitive IC Op Amps") ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Thinking outside the box... producing elegant solutions.
"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
I'd never even heard of the guy, so my ignorance is on display. If Jim actually knew the part number of any IC Frederiksen designed, I presume he'd have posted it, so Jim's ignorance is displayed equally clearly.
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Thinking outside the box... producing elegant solutions.
"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
But Jim can't name an integrated circuit he designed. He can remember that the guy prompted Jim to come up with an interesting innovation, but can't b ring himself to document anything Frederiksen himself was responsible for.
I know he was a specialist in high-power IC design, see his 1968 paper in JSSC, "A Monolithic High-Power Series Voltage Regulator", and with James Solomon, "A High-Performance 3-Watt Monolithic Class-B Power Amplifier"; both were probably Motorola parts. And I have his paper on a Monolithic-Sonar-System. There are likely many more papers if one were to look. He also had patents, which I have stored in my computer.
I'm not sure they are Motorola papers. By 1968, they both may have left Motorola... there was some turmoil in those days ;-)
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Thinking outside the box... producing elegant solutions.
"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
The first paper looks as if it might correspond to the LM4871 - which is not a number I ever ran into, and sounds a good deal later than 1968. The LM380 and LM384 seem to fit the bill better - the LM380 is credited with 2.5W on the data sheet, and the LM3284 was a selected part that could survive a higher supply voltage and was rated for 5W.
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The second part is a voltage regulator, and Bob Widlar managed to corner most of the glory there.
Paper "1968_Frederiksen,Solomon_amplifier.pdf" is MC1554... the output stage is my scheme... a sliding class-A version can be seen in the MC1530/31 OpAmps.
Paper "Frederiksen_regulator_JSSC(1968).pdf" looks like am LM117 regulator. I am unaware of what Motorola might have called it, I was not involved with regulators at that point-in-time, just PLL's and A/D/A (and I might have been away at Philco-Ford doing automotive stuff :-).
Note that Figure 6 is my current mirror scheme (not credited in standard Jim Solomon style). He was a cretin who got his ass publicly handed to him on a platter by writing a paper claiming he created the Gilbert multiplier.
It'll take me a few days to got thru the patents (*), but US4607172 is an NSC comparator, part number unknown, should have be found to infringe my patent US3638041, MC1650/51 MECL Comparators.
(*) I use Patent Fetcher which restricts me to 6 per 24 hour period without charge ;-) ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Thinking outside the box... producing elegant solutions.
"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
When two patents cover the same invention it's called "interference", not "infringement".
Google Patents is free. IIRC some of the PDFs aren't OCRed. Those ones, I usually fix using any2djvu:
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I like the djvu format, and it's unlikely to be vulnerable to PDF nasties anyway.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
hobbs at electrooptical dot net
http://electrooptical.net
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