Electronics Design does it Again!

Don't they have code enforcement out there? That would get you a huge fine in a lot of states, or even jail time. Some try to claim they are artists, but still end up in jail.

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Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.

That happens, when your 'Pease Porridge' is over three days old. ;-)

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Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.

Yeah, but there's some guy on this group who suggests that you often still can replace some spendy parts with a much cheaper discrete (or at least "lower tech" -- avoid those "all in one" ICs) solution too. :-)

Yep :-)

Although the design of such electronics (where price really matters) begins to follow to where it's produced or at least close to it, in Asia. I found that, for example, even younger Japanese engineers are quite familar with transistor-level circuitry. Probably everyone has seen a B-size sheet chock-full of transistors, as if they had used a vise to get them all to fit onto one page.

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Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

Yup, I slapped it onto a white proto-board to see if I was doing something silly. I works fine!

George H.

The Pease thing was elsewhere in Electronic Design magazine,

The offset circuit is OK for some definitions of OK.

The gain and frequency response vary with pot position. And the pot provides up to 10 volts of output offset, with a 5 volt opamp supply. PSRR will suck at low frequencies.

And something this obvious shouldn't be in the mag in the first place.

John

My point was that the gain and the frequency response change as the offset pot is turned. Tacky.

My other point is the Electronic Design will publish any old trivial junk to fill in space between the ads.

John

We have street cleaning, once a week on each side of the street, and you'll get a ticket if the car is out. That's really about it.

John

We don't need to park on the street :-) ...Jim Thompson

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| 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     |
             
      The only thing bipartisan in this country is hypocrisy

That wasn't your original point. Your original point was to say the gain was incorrectly stated.

True. ...Jim Thompson

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| 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     |
             
      The only thing bipartisan in this country is hypocrisy

A lot of places require any vehicle that isn't stored indoors to have a tag and insurance to prevent people's yards from turning into junkyards.

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Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.

Yes. It's not really clever, and it doesn't go to DC, but it works fine.

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John

Some places, like tony parts of Long Island, don't allow any vehicle to be parked on the street. That's to keep the riff-raff out of posh neighborhoods and off "our" beaches and parks. Some even forbid parking a vehicle in sight on your own property.

In theory a car can't be parked here in the same place for more than

72 hours, but that's not much enforced. The weekly street cleaning pretty much takes care of that. I guess Pease shuffles his rusty VWs occasionally.

John

If the capacitor is chosen to put the 3 dB point well below the lowest frequency used, the gain for frequencies of interest doesn't change with the pot setting.

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John

That, or they've read his column and declared him dangerous & insane. ;-)

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Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.

Absolutely wrong. It's remarkably stable! Surprised even me... I expected some corner movement... the Thevenin equivalent of the pot ranges between zero and 250 Ohms. I invite everyone to Spice it. John "Always Wrong" Larkin is totally wrong AGAIN!

[snip] ...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     |
             
      The only thing bipartisan in this country is hypocrisy

I like this as a test:

+10V | | | | c +5V--------------b e | | 1K | | | | gnd

What's the base voltage?

What's the base current?

What's the emitter voltage?

What's the collector current?

What's the collector voltage?

Any other comments?

I'm not kidding. One "experienced ee" said that, since the transistor is saturated, the collector voltage is zero. A tech applicant said that the base voltage is 0.6.

Some people got it right, but nobody has mentioned oscillation so far.

John

When cornered, change the subject ?:-)

How about the Pease/Matlin level shifter? Please elaborate on your statement, "My point was that the gain and the frequency response change as the offset pot is turned. Tacky." ...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     |
             
      The only thing bipartisan in this country is hypocrisy

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