Subject: [AUDITORY] [Documentation] Fully Balanced Audio Amplifiers From: Pierre Rodriguez <pierre.rodriguez@xxxxxxxx> Date: Fri, 9 May 2025 14:27:44 +0200--=_c1df7bab-b3ec-4e00-a4ad-33d6af290d75 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Hello all, At the moment, I am studying some audio amplifiers topologies. I am looking for technical documentations about "fully differential" amplifier. It means that not only the inputs of the amplifier are differentials, but the amplification stage as well. Per channel, there are two amplifiers, amplifying two opposite-phase signals (V+ and V-), finally driving the speaker (so instead of just a V+ signal referenced to GND). If anyone knows someone who have made or know some precise studies about this topology (distortion, matching requirements, etc), I would be glad to hear from it. Only thing I've found right now is this nice little article from TexasInstruments ( [ https://www.ti.com/lit/an/slyt165/slyt165.pdf | https://www.ti.com/lit/an/slyt165/slyt165.pdf ] ) Thanks ! Pierre Rodriguez --=_c1df7bab-b3ec-4e00-a4ad-33d6af290d75 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><body><div style=3D"font-family: arial, helvetica, sans-serif; font-s= ize: 12pt; color: #000000"><div>Hello all,</div><div><br data-mce-bogus=3D"= 1"></div><div> At the moment, I am studying some audio amplifiers top= ologies.</div><div><br data-mce-bogus=3D"1"></div><div> I am looking = for technical documentations about "fully differential" amplifier. It means= that not only the <strong>inputs</strong> of the amplifier are differentia= ls, but the <strong>amplification stage</strong> as well. Per channel, ther= e are two amplifiers, amplifying two opposite-phase signals (V+ and V-), fi= nally driving the speaker (so instead of just a V+ signal referenced to GND= ).</div><div><br data-mce-bogus=3D"1"></div><div> If anyone knows som= eone who have made or know some precise studies about this topology (distor= tion, matching requirements, etc), I would be glad to hear from it.</div><d= iv>Only thing I've found right now is this nice little article from TexasIn= struments (<a href=3D"https://www.ti.com/lit/an/slyt165/slyt165.pdf">https:= //www.ti.com/lit/an/slyt165/slyt165.pdf</a>)</div><div><br data-mce-bogus= =3D"1"></div><div>Thanks !</div><div>Pierre Rodriguez</div></div></body></h= tml> --=_c1df7bab-b3ec-4e00-a4ad-33d6af290d75--