On Sun, 22 Feb 2004 18:09:03 -0000, SWbeginner
wrote:

Do the dual gate mosfets outperform the NE602 with regards to IP3?

For some reason the NE602 refuses to oscillate with crystals but LC's are
OK.


Since you don't specify anything important like IP3,

Can someone kindly confirm what the hell "IP3" is?? I can only think
of "3rd order intermodulation products" which might easily be
completely wrong. It would be helpful if whoever first uses an
uncommon abbreviation would have the courtesy to state what it meant!
(as is customary first time around)
snarl, hiss, etc
--

The BBC: Licensed at public expense to spread lies.

On Mon, 23 Feb 2004 23:11:27 +0000, Paul Burridge
wrote:

On Sun, 22 Feb 2004 18:09:03 -0000, SWbeginner
wrote:

Do the dual gate mosfets outperform the NE602 with regards to IP3?

For some reason the NE602 refuses to oscillate with crystals but LC's are
OK.


Since you don't specify anything important like IP3,

Can someone kindly confirm what the hell "IP3" is?? I can only think
of "3rd order intermodulation products" which might easily be
completely wrong. It would be helpful if whoever first uses an
uncommon abbreviation would have the courtesy to state what it meant!
(as is customary first time around)
snarl, hiss, etc

It's only an "uncommon abbreviation" to certain Brits who think they
can learn by insulting the masters ;-)

Look up 3rd order intercept point.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

On Mon, 23 Feb 2004 16:12:55 -0700, Jim Thompson
wrote:



It's only an "uncommon abbreviation" to certain Brits who think they
can learn by insulting the masters ;-)

Look up 3rd order intercept point.

...Jim Thompson

thought everybody had studied Ham Radio December 77 throughly - even
in UK.....
73 ex-G5BFV (at BPO radio station Bearley/SOA)

----
Jan-Martin, LA8AK, N-4623 Kristiansand
http://home.online.no/~la8ak/

Jan-Martin Noeding, LA8AK wrote in message
...
On Mon, 23 Feb 2004 16:12:55 -0700, Jim Thompson
wrote:



It's only an "uncommon abbreviation" to certain Brits who think they
can learn by insulting the masters ;-)

Look up 3rd order intercept point.

...Jim Thompson

thought everybody had studied Ham Radio December 77 throughly - even
in UK.....
73 ex-G5BFV (at BPO radio station Bearley/SOA)

----
Jan-Martin, LA8AK, N-4623 Kristiansand
http://home.online.no/~la8ak/

That's a helluva web site you keep there :-)
Impressive!

regards
john

How high can the 74HC4066 as mixer go?
I need 50Mhz tops.

I still like to know how strong dual gate MOSFET is compared to say diode
ring.

thx

SWbeginner wrote in message
...
How high can the 74HC4066 as mixer go?
I need 50Mhz tops.

I still like to know how strong dual gate MOSFET is compared to say diode
ring.

thx

?

The HC4066 is OK(ish) to about 10megs.
A dual gate fet (eg 40673) -with care- should be able give out roughly the
same, or a little more voltage than what is coming in. With a diode ring
expect to pick up (say) only 40mV of an incoming 100mV.
[Easiest / most reliable]: use a "Bus Switch" such as the FST3125, toggled
by 74AC type logic; handle the A.C. signals by couple of video op-amps).
('Output' signal looks like what you see in a text book).
regards
john

SWbeginner wrote in message
...
How high can the 74HC4066 as mixer go?
I need 50Mhz tops.

I still like to know how strong dual gate MOSFET is compared to say diode
ring.

thx

?

The HC4066 is OK(ish) to about 10megs.
A dual gate fet (eg 40673) -with care- should be able give out roughly the
same, or a little more voltage than what is coming in. With a diode ring
expect to pick up (say) only 40mV of an incoming 100mV.
[Easiest / most reliable]: use a "Bus Switch" such as the FST3125, toggled
by 74AC type logic; handle the A.C. signals by couple of video op-amps).
('Output' signal looks like what you see in a text book).
regards
john

How high can the 74HC4066 as mixer go?
I need 50Mhz tops.

I still like to know how strong dual gate MOSFET is compared to say diode
ring.

thx

Jan-Martin Noeding, LA8AK wrote in message
...
On Mon, 23 Feb 2004 16:12:55 -0700, Jim Thompson
wrote:



It's only an "uncommon abbreviation" to certain Brits who think they
can learn by insulting the masters ;-)

Look up 3rd order intercept point.

...Jim Thompson

thought everybody had studied Ham Radio December 77 throughly - even
in UK.....
73 ex-G5BFV (at BPO radio station Bearley/SOA)

----
Jan-Martin, LA8AK, N-4623 Kristiansand
http://home.online.no/~la8ak/

That's a helluva web site you keep there :-)
Impressive!

regards
john

On Mon, 23 Feb 2004 16:12:55 -0700, Jim Thompson
wrote:

Look up 3rd order intercept point.

And pay special attention if this is input IP3 (the power of the test
tones are measured at the input of the device) or output IP3 (power
levels measured at device output).

This is especially important, since a typical active Gilbert cell
mixer (1496, NE602) have some gain, while a typical diode ring mixer
(SBL-1) have a 6-7 dB loss.

Paul OH3LWR