Hi all:
I´m designing a tube power amp "approximaton", in which i simulate the trasnfer curve of tubes using a diode ladder, to get sucessive gain reduction versus output amplitude, like compression..
After that i added something similar to the marshall output impedance simulator (http://www.freepatentsonline.com/5467400.html), but instead of a opamp, i´m using a transistor as a gyrator, and some other values for components..
i tried to do the same thing with CMOS inverters and twin-t filters on feedback, but somehow i don´t get the same kind of response, looks like phase shifts don´t let me mix the treble boost with the bottom peak in a nice manner (like the marshall ckt does).
so, i decided to keed the marshall type simulator..but i´m worried about IP..maybe, eventually i could sell this things, and i wouldn´t like to get "cease and desist" letters from them..
a penny for your thoughs....
I´m designing a tube power amp "approximaton", in which i simulate the trasnfer curve of tubes using a diode ladder, to get sucessive gain reduction versus output amplitude, like compression..
After that i added something similar to the marshall output impedance simulator (http://www.freepatentsonline.com/5467400.html), but instead of a opamp, i´m using a transistor as a gyrator, and some other values for components..
i tried to do the same thing with CMOS inverters and twin-t filters on feedback, but somehow i don´t get the same kind of response, looks like phase shifts don´t let me mix the treble boost with the bottom peak in a nice manner (like the marshall ckt does).
so, i decided to keed the marshall type simulator..but i´m worried about IP..maybe, eventually i could sell this things, and i wouldn´t like to get "cease and desist" letters from them..
a penny for your thoughs....