RF mixer IC recommendation

[Paul Keinanen]

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

 

[John Jardine]

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

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

regards
john

 

[SWbeginner]

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

 

[John Jardine]

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