https://www.microsemi.com/document-portal/doc_view/134814-micronote-701-pin-diode-fundamentals

Of course, given that this is an RF appnote, it's wrong.

Interesting pattern: clumsy font changes are flags for errors.

--

Father Brown's figure remained quite dark and still;
but in that instant he had lost his head. His head was
always most valuable when he had lost it.

On Monday, November 15, 2021 at 5:15:22 AM UTC+11, jla...@highlandsniptechnology.com wrote:
> https://www.microsemi.com/document-portal/doc_view/134814-micronote-701-pin-diode-fundamentals
>
>
> Of course, given that this is an RF appnote, it's wrong.
>
> Interesting pattern: clumsy font changes are flags for errors.

The font changes I could see were for the equations, which include subscripted greek characters.

As usual, John Larkin hasn't told us what the errors are - they aren't obvious to me. Maybe his brain switches off when it sees an equation.

They use resistance where they clearly mean impedance, but John Larkin does too.

--
Bill Sloman, Sydney

On Sunday, 14 November 2021 at 21:57:22 UTC, bill....@ieee.org wrote:
> On Monday, November 15, 2021 at 5:15:22 AM UTC+11, jla...@highlandsniptechnology.com wrote:
> > https://www.microsemi.com/document-portal/doc_view/134814-micronote-701-pin-diode-fundamentals
> >
> >
> > Of course, given that this is an RF appnote, it's wrong.
> >
> > Interesting pattern: clumsy font changes are flags for errors.
> The font changes I could see were for the equations, which include subscripted greek characters.
>
> As usual, John Larkin hasn't told us what the errors are - they aren't obvious to me. Maybe his brain switches off when it sees an equation.
>
> They use resistance where they clearly mean impedance, but John Larkin does too.
>
> --
> Bill Sloman, Sydney

A large part of that app note discusses the non-resistive elements of the impedance.
It seem quite well written to me. I'm really not that concerned about a few minor
problems with consistency of fonts.

John

On Sun, 14 Nov 2021 15:39:06 -0800 (PST), John Walliker
<jrwalliker@gmail.com> wrote:

>On Sunday, 14 November 2021 at 21:57:22 UTC, bill....@ieee.org wrote:
>> On Monday, November 15, 2021 at 5:15:22 AM UTC+11, jla...@highlandsniptechnology.com wrote:
>> > https://www.microsemi.com/document-portal/doc_view/134814-micronote-701-pin-diode-fundamentals
>> >
>> >
>> > Of course, given that this is an RF appnote, it's wrong.
>> >
>> > Interesting pattern: clumsy font changes are flags for errors.
>> The font changes I could see were for the equations, which include subscripted greek characters.
>>
>> As usual, John Larkin hasn't told us what the errors are - they aren't obvious to me. Maybe his brain switches off when it sees an equation.
>>
>> They use resistance where they clearly mean impedance, but John Larkin does too.
>>
>> --
>> Bill Sloman, Sydney
>
>A large part of that app note discusses the non-resistive elements of the impedance.
>It seem quite well written to me. I'm really not that concerned about a few minor
>problems with consistency of fonts.
>
>John

How about consistency of units?

--

Father Brown's figure remained quite dark and still;
but in that instant he had lost his head. His head was
always most valuable when he had lost it.

On Monday, November 15, 2021 at 11:42:43 AM UTC+11, jla...@highlandsniptechnology.com wrote:
> On Sun, 14 Nov 2021 15:39:06 -0800 (PST), John Walliker
> <jrwal...@gmail.com> wrote:
>
> >On Sunday, 14 November 2021 at 21:57:22 UTC, bill....@ieee.org wrote:
> >> On Monday, November 15, 2021 at 5:15:22 AM UTC+11, jla...@highlandsniptechnology.com wrote:
> >> > https://www.microsemi.com/document-portal/doc_view/134814-micronote-701-pin-diode-fundamentals
> >> >
> >> >
> >> > Of course, given that this is an RF appnote, it's wrong.
> >> >
> >> > Interesting pattern: clumsy font changes are flags for errors.
> >>
> >> The font changes I could see were for the equations, which include subscripted greek characters.
> >>
> >> As usual, John Larkin hasn't told us what the errors are - they aren't obvious to me. Maybe his brain switches off when it sees an equation.
> >>
> >> They use resistance where they clearly mean impedance, but John Larkin does too.
> >
> >A large part of that app note discusses the non-resistive elements of the impedance.
> >It seem quite well written to me. I'm really not that concerned about a few minor
> >problems with consistency of fonts.
>
> How about consistency of units?

Do tell us which units you imagine to be inconsistent. You are starting to sound remarkably like Flyguy and John Doe.

--
Bill Sloman, Sydney

On Monday, November 15, 2021 at 1:07:10 AM UTC, bill....@ieee.org wrote:
> On Monday, November 15, 2021 at 11:42:43 AM UTC+11, jla...@highlandsniptechnology.com wrote:
> > On Sun, 14 Nov 2021 15:39:06 -0800 (PST), John Walliker
> > <jrwal...@gmail.com> wrote:
> >
> > >On Sunday, 14 November 2021 at 21:57:22 UTC, bill....@ieee.org wrote:
> > >> On Monday, November 15, 2021 at 5:15:22 AM UTC+11, jla...@highlandsniptechnology.com wrote:
> > >> > https://www.microsemi.com/document-portal/doc_view/134814-micronote-701-pin-diode-fundamentals
> > >> >
> > >> >
> > >> > Of course, given that this is an RF appnote, it's wrong.
> > >> >
> > >> > Interesting pattern: clumsy font changes are flags for errors.
> > >>
> > >> The font changes I could see were for the equations, which include subscripted greek characters.
> > >>
> > >> As usual, John Larkin hasn't told us what the errors are - they aren't obvious to me. Maybe his brain switches off when it sees an equation.
> > >>
> > >> They use resistance where they clearly mean impedance, but John Larkin does too.
> > >
> > >A large part of that app note discusses the non-resistive elements of the impedance.
> > >It seem quite well written to me. I'm really not that concerned about a few minor
> > >problems with consistency of fonts.
> >
> > How about consistency of units?
> Do tell us which units you imagine to be inconsistent. You are starting to sound remarkably like Flyguy and John Doe.
>
> --
> Bill Sloman, Sydney

Well I question this:
upper right corner of page 1:

"Resistance of the order of -0.1 Ω at 1
Amp forward bias increasing to about
10,000Ω at 1µA forward bias
represents a realistic range..."

negative ohms? the diode has a negative
resistance region?
No, not according the chart just below that
text.

= RS

On Saturday, December 11, 2021 at 11:42:05 AM UTC+11, Rich S wrote:
> On Monday, November 15, 2021 at 1:07:10 AM UTC, bill....@ieee.org wrote:
> > On Monday, November 15, 2021 at 11:42:43 AM UTC+11, jla...@highlandsniptechnology.com wrote:
> > > On Sun, 14 Nov 2021 15:39:06 -0800 (PST), John Walliker
> > > <jrwal...@gmail.com> wrote:
> > >
> > > >On Sunday, 14 November 2021 at 21:57:22 UTC, bill....@ieee.org wrote:
> > > >> On Monday, November 15, 2021 at 5:15:22 AM UTC+11, jla...@highlandsniptechnology.com wrote:
> > > >> > https://www.microsemi.com/document-portal/doc_view/134814-micronote-701-pin-diode-fundamentals
> > > >> >
> > > >> >
> > > >> > Of course, given that this is an RF appnote, it's wrong.
> > > >> >
> > > >> > Interesting pattern: clumsy font changes are flags for errors.
> > > >>
> > > >> The font changes I could see were for the equations, which include subscripted greek characters.
> > > >>
> > > >> As usual, John Larkin hasn't told us what the errors are - they aren't obvious to me. Maybe his brain switches off when it sees an equation.
> > > >>
> > > >> They use resistance where they clearly mean impedance, but John Larkin does too.
> > > >
> > > >A large part of that app note discusses the non-resistive elements of the impedance.
> > > >It seem quite well written to me. I'm really not that concerned about a few minor
> > > >problems with consistency of fonts.
> > >
> > > How about consistency of units?
> > Do tell us which units you imagine to be inconsistent. You are starting to sound remarkably like Flyguy and John Doe.
> >
> > --
> > Bill Sloman, Sydney
> Well I question this:
> upper right corner of page 1:
>
> "Resistance of the order of -0.1 Ω at 1 Amp forward bias increasing to about 10,000Ω at 1µA forward bias represents a realistic range..."
>
> negative ohms? the diode has a negative resistance region? No, not according the chart just below that text.

It looks more like bad proof-reading - what was probably intended was ~0.1 Ω where the "~" implies approximately 0.1 Ω .

Application notes are marketing documents, and they are very jealous of their right to control what potential customers see, which can create problems for the engineers who have to deliver what they have promised. I got a trip to France out of that at one point - we had to change our machine so that it could deliver what I'd said it could, when our sub-contractors had initially chosen not to include as much low-pass filtering as I'd expected them to when I wrote my screed for marketing (some time before the machine specification had been nailed down).

--
Bill Sloman, Sydney