On Wed, 04 Nov 2009 15:24:10 -0600, John Fields
wrote:
On Wed, 04 Nov 2009 12:39:06 -0700, Jim Thompson
wrote:
On Wed, 04 Nov 2009 13:58:37 -0500, "Michael A. Terrell"
wrote:
Jim Thompson wrote:
On Wed, 04 Nov 2009 10:34:20 -0600, John Fields
wrote:
On Wed, 4 Nov 2009 13:17:24 -0000, "ian field"
wrote:
What would be the minimalist circuit blocks for a frequency domain sample
and hold?
What I envisage is the sampling triggered by a tone that exceeds a pre-set
threshold and continues to generate a copy of the tone until reset.
---
I'm confused...
What do you mean by 'sampling' and what do you mean by 'threshold'?
JF
Wasn't there at one time something called a "bucket brigade" that
could take snap-shot recordings?
Digikey was still selling the Panasonic 'Bucket Brigade Analog Delay
Lines' a few years ago.
Of course, the best response to the OP is, "WHY?"
---
I don't much care about why, since the fun for me is doing the design.
:-)
Seems what the OP wants to do is monitor a sine wave source and then
when the source's tone gets to some "threshold", have the device
monitoring the source generate that tone forever.
But, who knows for sure, since his "specs" were pretty sketchy?
JF
Indeed! Is the frequency always the same value? Or a variety of
frequencies? Why not a simple tone detector?
...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 |
Obama says, "I AM NOT a cry baby, Fox REALLY IS out to get me!"