Clock to run a circut, new way?

S

Saint

Guest
Hello, im a uni/collage student and while experimenting in the lab I
created a small system which produces a 5V square wave signal to power
a digital TTL/CMOS circut. However, unlike the traditional clocks, e.g
555 timer, This clock uses no capcitor to create the delay for the
frequency. It works and is fully tested, with lab components and can
reach speeds of up to 17MHz. I am not sure if it has been invented
before, or even if it would be useful, but it could possibly be faster
or cheaper than some of its counterparts. Sorry I can not tell you how
I built it as i have not yet got a patent and want to keep it on the
low. Has anyone heard of something similar? or know any advantages of a
capacitorless clocking device? Any help with this would be appreciated.
 
"Saint" <dane.boers@gmail.com> wrote in news:1108818154.010890.252770
@c13g2000cwb.googlegroups.com:

Hello, im a uni/collage student and while experimenting in the lab I
created a small system which produces a 5V square wave signal to power
a digital TTL/CMOS circut. However, unlike the traditional clocks, e.g
555 timer, This clock uses no capcitor to create the delay for the
frequency. It works and is fully tested, with lab components and can
reach speeds of up to 17MHz. I am not sure if it has been invented
before, or even if it would be useful, but it could possibly be faster
or cheaper than some of its counterparts. Sorry I can not tell you how
I built it as i have not yet got a patent and want to keep it on the
low. Has anyone heard of something similar? or know any advantages of a
capacitorless clocking device? Any help with this would be appreciated.
Click to expand...
Since it's been "fully tested", what're the spec's? Low frequency
capability? Accuracy? Stability? Output drive? Operating voltages and
current requirements?
 
However, unlike the traditional clocks, e.g
555 timer, This clock uses no capcitor to create the delay for the
frequency.
Click to expand...
Delay? Did you say delay? What a novel concept.
 
Saint wrote...
Hello, im a uni/collage student and while experimenting in the lab I
created a small system which produces a 5V square wave signal to power
a digital TTL/CMOS circut. However, unlike the traditional clocks, e.g
555 timer, This clock uses no capcitor to create the delay for the
frequency. It works and is fully tested, with lab components and can
reach speeds of up to 17MHz. I am not sure if it has been invented
before, or even if it would be useful, but it could possibly be faster
or cheaper than some of its counterparts. Sorry I can not tell you how
I built it as i have not yet got a patent and want to keep it on the
low. Has anyone heard of something similar? or know any advantages of a
capacitorless clocking device? Any help with this would be appreciated.
Click to expand...
Relaxation oscillators without any obvious explicit capacitors are
common, but they do have capacitors, which are an intrinsic part of
the components in the oscillators. Consider using logic gate delay.
This delay is due to capacitance and stored charge in the wiring and
transistors making up the gate. For example, a logic-inverter ring
oscillator, where the frequency is tuned with the IC supply voltage.


--
Thanks,
- Win
 
while experimenting in the lab I
created a small system which
produces a 5V square wave
signal
Click to expand...
Yeah, most of the time when I set out to build an amplifier it
oscillates instead :). Don't worry, you'll get better at it...
 
Ian Stirling wrote:

There are many such devices.
Phase delay schemes, for example using multiple amplifiers or gates, or
R/C or R/L or L/C networks, transmission lines, or ... in order to provide
a frequency dependant delay in combination with an amplifier to make a
clock.
Or mechanical schemes, using vibration of crystals or tuning forks, or ...
Click to expand...
mercury columns

--
John Popelish
 
Tim Shoppa wrote:
while experimenting in the lab I
created a small system which
produces a 5V square wave
signal


Yeah, most of the time when I set out to build an amplifier it
oscillates instead :). Don't worry, you'll get better at it...

Old saying among analog engineers: "Oscillators dont - everything else
Click to expand...
does".

--
Luhan Monat (luhanis 'at' yahoo 'dot' com)
"The future is not what it used to be..."
http://members.cox.net/berniekm
 
On Sat, 19 Feb 2005 12:12:14 -0800, Luhan Monat wrote:

Tim Shoppa wrote:
while experimenting in the lab I
created a small system which
produces a 5V square wave
signal


Yeah, most of the time when I set out to build an amplifier it
oscillates instead :). Don't worry, you'll get better at it...

Old saying among analog engineers: "Oscillators dont - everything else
does".
Click to expand...
The programmer's corrilary: "Constants aren't and Variables won't."

--
Keith
 
On Sat, 19 Feb 2005 17:22:26 GMT, Fred Bloggs <nospam@nospam.com>
wrote:

...any old amplifier with positive feedback...
^^^^
Click to expand...
AC


John
 
In article <cv7mgr03ih@drn.newsguy.com>,
Winfield Hill <hill_a@t_rowland-dotties-harvard-dot.s-edu> wrote:
[...]
Relaxation oscillators without any obvious explicit capacitors are
common, but they do have capacitors,
Click to expand...

Way back when I was a mere lad, I knew someone who had invented a very
slow PNP transistor. Only after he invented it did he discover that he was
about the 3rd to do so. The HFE of the device was low because the base
was effectively about a foot thick. Its great charm was that if you
applied a pulse on the base, a pulse would appear on the collector with a
lot more delay than the frequency responce of the circuit would suggest.
The extra delay was due to the holes having to wander through some sort of
magic doping gradient in the base. Perhaps this has just been
re-invented.
--
--
kensmith@rahul.net forging knowledge
 
"keith" <krw@att.bizzzz> wrote in message
news:pan.2005.02.19.19.34.22.719942@att.bizzzz...
On Sat, 19 Feb 2005 12:12:14 -0800, Luhan Monat wrote:

Tim Shoppa wrote:
while experimenting in the lab I
created a small system which
produces a 5V square wave
signal


Yeah, most of the time when I set out to build an amplifier it
oscillates instead :). Don't worry, you'll get better at it...

Old saying among analog engineers: "Oscillators dont - everything else
does".

The programmer's corrilary: "Constants aren't and Variables won't."

--
Keith

"Some girls will, some girls won't."
Click to expand...

Ken
 
Ken Taylor <ken@home.nz> wrote:
"keith" <krw@att.bizzzz> wrote in message
news:pan.2005.02.19.19.34.22.719942@att.bizzzz...
On Sat, 19 Feb 2005 12:12:14 -0800, Luhan Monat wrote:

Tim Shoppa wrote:
while experimenting in the lab I created a small system which
produces a 5V square wave signal
snip
Old saying among analog engineers: "Oscillators dont - everything else
does".

The programmer's corrilary: "Constants aren't and Variables won't."

--
Keith

"Some girls will, some girls won't."
Click to expand...
And some oscillate between the two extremes.
 
On Sun, 20 Feb 2005 23:06:25 +0000, Ian Stirling wrote:

Ken Taylor <ken@home.nz> wrote:
"keith" <krw@att.bizzzz> wrote in message
news:pan.2005.02.19.19.34.22.719942@att.bizzzz...
On Sat, 19 Feb 2005 12:12:14 -0800, Luhan Monat wrote:

Tim Shoppa wrote:
while experimenting in the lab I created a small system which
produces a 5V square wave signal
snip
Old saying among analog engineers: "Oscillators dont - everything else
does".

The programmer's corrilary: "Constants aren't and Variables won't."

--
Keith

"Some girls will, some girls won't."

And some oscillate between the two extremes.
Click to expand...
Most go only one way though.

--
Keith
 
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