679	2007-05-01 10:17:26	Hari G	Gain of MC1496
Message	Date	From	Subject
All, I would like to know how much is the gain of MC1496 when used as first mixer and as a product detector, is this too much dependent on the resitor between pin 2 and 3 or is there some nominal value which i can use in my calculations for an overall Rx arrangement. -- De Hari VU2GHB
686	2007-05-01 16:15:28	Kevin Purcell	Re: Gain of MC1496
As it mentioned in EMRFD the 1496 is just a Gilbert Cell mixer so if you follow through the small amp gain circuit analysis ... Or you can cheat and read the datasheet and application note where the resistor between pin 2 and 3 (the emitters of the diff pair) sets the gain along with pin 5 which sets the operating current (which affects the gain by setting r_e): <http://www.onsemi.com/pub/Collateral/MC1496-D.PDF> <http://www.onsemi.com/pub/Collateral/AN531-D.PDF> Actually this application note is a nice supplement to EMRFD on Gilbert Cell mixers. BTW, I see that On Semiconductor is making the 1496 still? <http://www.onsemi.com/PowerSolutions/product.do?id=MC1496> In SMT packing too (though they still have a 14 pin DIP). I would have thought this would be EOLed by now and joined the 40673 as the device from the 1970s we fondly remember. 73 Kevin N7WIM
688	2007-05-01 18:09:49	Roy J. Tellason	Re: Gain of MC1496
On Tuesday 01 May 2007 13:17, Hari G wrote: > All, > > I would like to know how much is the gain of MC1496 when used as first > mixer and as a product detector, is this too much dependent on the resitor > between pin 2 and 3 or is there some nominal value which i can use in my > calculations for an overall Rx arrangement. I'm not that familiar with the part, but you can find a datasheet for it here: http://www.classiccmp.org/rtellason/by-mfr-number.html if that'll help. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin
690	2007-05-01 18:51:06	Hari G	Re: Gain of MC1496
Kevin /Roy , Thanks for the pointers, i wanted them to calculate the gain of a Rx arrangement i will have a look. Iam using 14pin dip version in that. wiuth single conversion with 10.7Mhz IF. Many thanks Hari (VU2GHB) On 5/2/07, Kevin Purcell <kevinpurcell@pobox.com> wrote: As it mentioned in EMRFD the 1496 is just a Gilbert Cell mixer so if you follow through the small amp gain circuit analysis ... Or you can cheat and read the datasheet and application note where the resistor between pin 2 and 3 (the emitters of the diff pair) sets the gain along with pin 5 which sets the operating current (which affects the gain by setting r_e): < http://www.onsemi.com/pub/Collateral/MC1496-D.PDF> <http://www.onsemi.com/pub/Collateral/AN531-D.PDF > Actually this application note is a nice supplement to EMRFD on Gilbert Cell mixers. BTW, I see that On Semiconductor is making the 1496 still? < http://www.onsemi.com/PowerSolutions/product.do?id=MC1496> In SMT packing too (though they still have a 14 pin DIP). I would have thought this would be EOLed by now and joined the 40673 as the device from the 1970s we fondly remember. 73 Kevin N7WIM
693	2007-05-02 05:59:09	topossibilities	Re: Gain of MC1496
I've used the MC1496G (10 pin round can package) in many designs and perfer it over the NE/SA602. It's much better specified and flexible. Although it requires a few more external parts, you can get the operating parameters (e.g. current, gain, input and output impedances for inter-stage matching). It's LO port drive requirements are easy too. I used it for the Rx / Tx mixers, product detector and balanced modulator in a 10W SSB transceiver that fit on a 4" x 5" PCB. Ed, W1AAZ Lots of books, parts, kits, test equipment for sale at: http://mysite.verizon.net/topossibilities/
694	2007-05-02 20:05:21	Allison Parent	Re: Gain of MC1496

721	2007-05-06 13:24:05	Kevin Purcell	Re: Gain of MC1496
This is a bit long ...