Anyone knows what exactly is called Gilbert cell? How many transistors does it
actually have? And does it have a tanh nonlinear response from one differential
input or is there some kind of split current mirror used to factor this
nonlinearity out and get a perfect linear analog multiplier?
Is it
Hi gEDA gurus, 2 newbie questions:
1. Suppose I have a PCB element with multiple pins, e.g.
Element[0x00 row 5 pins 1 1 0 4800 0 100 ]
(
Pin[ 0 0 8566 2866 1 5700 Pin_1 1 0x0101]
Pin[ 1 0 8566 2866 1 5700 Pin_2 2 0x0001]
Pin[ 2 0 8566
On Wed, Sep 06, 2006 at 06:55:35AM -0400, Dan McMahill wrote:
Bob Paddock wrote:
On Wednesday 06 September 2006 03:36, Karel Kulhavy wrote:
Anyone knows what exactly is called Gilbert cell?
The Gilbert Cell is named after Barrie Gilbert of Analog Devices,
invented in 1968.
On Wed, Sep 06, 2006 at 06:55:35AM -0400, Dan McMahill wrote:
Bob Paddock wrote:
On Wednesday 06 September 2006 03:36, Karel Kulhavy wrote:
Anyone knows what exactly is called Gilbert cell?
The Gilbert Cell is named after Barrie Gilbert of Analog Devices,
invented in 1968.
I like how
If you have used a Tektronix plug-in style Oscilloscope, 74XX series,
you have seen some of Barrie's early design work. He designed the
stroke generator that creates the data characters on the screen, e.g.,
the volts and time scales. It's not a raster scan that forms the
characters but the
John Dozsa wrote:
If you have used a Tektronix plug-in style Oscilloscope, 74XX series,
you have seen some of Barrie's early design work. He designed the
stroke generator that creates the data characters on the screen, e.g.,
the volts and time scales. It's not a raster scan that forms the
I just got confirmation for our room at MIT! Therefore, please find
the official gEDA code sprint announcement below.
== GEDA Code Sprint Announcement ===
It's official! The gEDA code sprint is scheduled for Saturday,
September 30th, from 9am -- 4pm Eastern
On Wed, Sep 06, 2006 at 09:55:09AM -0400, Dan McMahill wrote:
John Dozsa wrote:
If you have used a Tektronix plug-in style Oscilloscope, 74XX series,
you have seen some of Barrie's early design work. He designed the
stroke generator that creates the data characters on the screen, e.g.,
Hi.
The list of keyboard shortcuts in section Mode(Save|Restore) of the
current pcb manual contains some lines that are not quite in sync with
the actual program. (http://pcb.sourceforge.net/pcb-20060822/pcb.html):
Key manual actual program
Patches to the .texi file are best, and welcome :-)
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Hello
I got an idea how to showcase gEDA with Ronja on Wikinews.
I got an idea to write a reportage about how hardware based solely on the
idea of open source is getting into usage by substantial amount of people.
There are 128 installations of Ronja worldwide, most of them in Czech
Republic
Karel Kulhavy wrote:
Anyone knows what exactly is called Gilbert cell?
Usually when someone says Gilbert cell they are refering to the double
balanced mixer which I've attached as double_balanced.png. It is
basically just a differential amplifier (Q1, Q2, R1, R2, and current
source I1). The
Content-Type: image/png;
name=double_balanced.png
You know, on this list you could have posted .sch files ;-)
(as long as you embed the components, I suppose)
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Dan McMahill wrote:
Bonus points to anyone who can name the real inventor of the mixer in
question here. Hint: It wasn't Gilbert even though it's called a
Gilbert cell.
H. Jones I believe. Bob Widlar didn't design that particular cell
structure nor specifically generalize the
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