Following this thread I built myself an oscillator, actually four so far, that work well out of 7404, 74LS04, 74LS14, and 74HC04 ICs (they all run 19-22Mhz except the Schmitt trigger one which runs more like 12Mhz). I took the advice of the person who told me I should be the person to test out an ECL circuit and I am going to attempt to build that too, but I don't know anything about ECL so I think I will ask for some advice here. I don't have an ECL inverter but I do have the part MC100EP105 (
http://www.onsemi.com/pub_link/Collateral/MC10EP105-D.PDF) which is AND/NAND and can be made into an inverter by feeding the output of one stage into both the inputs (one differential pair to two differential pairs) of the next stage. So this is the plan:
I0->I1 (first "inverter" to second)
Q0 ->!D1a 29->22
Q0 ->!D1b 29->20
!Q0->D1a 30->23
!Q0->D1b 30->21
so, pin 29 to pins 20 and 22, pin 30 to pins 21 and 23
I1->I3 (second "inverter" to third)
Q1 ->!D3a 2->14
Q1 ->!D3b 2->11
!Q1->D3a 3->15
!Q1->D3b 3->12
so, pin 2 to pins 11 and 14, pin 3 to pins 21 and 23
I3->I0 (third "inverter" back to first)
Q3 ->!D0a 6->26
Q3 ->!D0b 6->24
!Q3->D0a 7->27
!Q3->D0b 7->25
so, pin 6 to pins 24 and 26, pin 7 to pins 25 and 27
And a tap off of D0a as the oscillator output. Vcc = +5V, Vee = 0V
I have to use an adapter board and traces are probably longer than they should be. For traces above I will cut the wires to the same length to equalize propagation delays regardless of if they need that length or not. Unfortunately, the adapter board itself has varying lengths on the traces.
Is it that simple or am I being naive about ECL circuits? Thanks.