[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [AUDITORY] [Documentation] Fully Balanced Audio Amplifiers
- To: AUDITORY@xxxxxxxxxxxxxxx
- Subject: Re: [AUDITORY] [Documentation] Fully Balanced Audio Amplifiers
- From: "J. Scott Merritt" <alsauser@xxxxxxxxxxxxxx>
- Date: Sat, 10 May 2025 10:15:36 -0400
- Approved-by: alsauser@xxxxxxxxxxxxxx
- Arc-authentication-results: i=1; mx.google.com; dkim=pass header.i=@LISTS.MCGILL.CA header.s=SELECTOR1 header.b=nifJROyp; spf=pass (google.com: domain of owner-auditory@xxxxxxxxxxxxxxx designates 132.206.27.104 as permitted sender) smtp.mailfrom=owner-auditory@xxxxxxxxxxxxxxx; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=pragmasoft.com
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605; h=list-archive:list-owner:list-subscribe:list-unsubscribe:list-help :precedence:in-reply-to:to:subject:from:sender:reply-to:date :message-id:content-transfer-encoding:mime-version:references :feedback-id:approved-by:dkim-signature; bh=MaUNplsvVMu1YL8sZ1/Gw1ORisnJDXqE2b4blFLfvwI=; fh=5/42mu9FVmfuMp6n0xGXVcDar2H3ENcHt8Uv11Om8gY=; b=go9eMrRP4DW8IE+zM/qG9sOoyQxsLlu9L1MeYKvLaQiVtvmu6kH2GIur7EgT27BrwC 7fPn5f9CywBnKp/IcjQs2RT0UTsUEcAh6gqqV5d8npdnQ+5xR5UuHFqUUuHxDTa63clR lBhPIH6R+Ma8nLIL5kv1jBv5x68jvoPwQ4ObadJ25j8EmPnT0wpREboQB+AiZVj780ZW PB4FHrOaC4gwG6CUU1wJoGD+oqVe29mlxmdrurRz7Ww9rDixbVyDIa+2Vu6U2mj0Mo92 Ve0iMFMaXv2yQiMDDfIqeudE0M6XgsZY1FNCWwLoXKdFZ+Z/lZPjkEJfOwvlmvKd3nlT hRWw==; dara=google.com
- Arc-seal: i=1; a=rsa-sha256; t=1746936633; cv=none; d=google.com; s=arc-20240605; b=FDsO+vZ0gENKeWgg7Zf4SY0WLhukBoNI+LtNDdgsQ5lcdLFZlfj163fax39WQ+71RF SuQsV1oxUpQJOQUKexr+ek+1xH0ABA8pwX6SwcRchJRVOSp21hjmc+Rnkm6TkA1wpIeD D6OTjs539Q03GraZPOm2AV/f/1N0GX6xi/bHcyFfbLCtLRvRnwy1MVGPTr7jbmdemsDG 6fppFtuyJldtaLFdAGFojw4/DH0wjVlIOcjgKLkuT7vL+7O3SVgVcy5njpQN6w9DQKeO NqkAMD/CMrvDdH9Tbs7BZn4zw8dtPdn4SCbC7bC3DK51Fk9jV6HXdZmMH6pPR7ZiCf75 Yq1g==
- Authentication-results: mx.google.com; dkim=pass header.i=@LISTS.MCGILL.CA header.s=SELECTOR1 header.b=nifJROyp; spf=pass (google.com: domain of owner-auditory@xxxxxxxxxxxxxxx designates 132.206.27.104 as permitted sender) smtp.mailfrom=owner-auditory@xxxxxxxxxxxxxxx; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=pragmasoft.com
- Delivered-to: dan.ellis@xxxxxxxxx
- Dkim-signature: v=1; a=rsa-sha256; d=LISTS.MCGILL.CA; s=SELECTOR1; c=relaxed/relaxed; bh=MaUNplsvVMu1YL8sZ1/Gw1ORisnJDXqE2b4blFLfvwI=; i=@LISTS.MCGILL.CA; h=Approved-By:Feedback-ID:References:Mime-Version:Content-Type:Content-Transfer-Encoding:Message-ID:Date:Reply-To:Sender:From:Subject:To:In-Reply-To:List-Help:List-Unsubscribe:List-Subscribe:List-Owner:List-Archive; b=nifJROypURnuPbJY/WSBhH+d+ABX55zxZ6HlqyIp3s2AVAs/rMXT7bZTzuCW3b7MEPaCssOv9xsqoIKWB60ssSkTTKVOE9S6ozp+Oz0wAbevqTViuDtg8Yk/yUDEw4/q3iUJJ/s/YZ1rUbI4yCssN3i95u4foelcdMgFoUccouNAsLwuO6IcRbaEiiIT4B0luMyGxGNY9PkvVmHO9JbaMndCpSXwqxmmwoYmMamn+9bZ47P86XkvhCuduaeCzCZuWw/szf1Hq5O5I8WAKuDFi3pZasRCKgTurk83RNhbHoWwj3kLJ37y3rhrFHXBaZ+fLCvDheSlxY1Al3cciEn0eA==
- Feedback-id: if5414767:Fastmail
- In-reply-to: <931642565.8604344.1746793664549.JavaMail.zimbra@centrale.centralelille.fr>
- List-archive: <https://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>
- List-help: <https://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>, <mailto:LISTSERV@LISTS.MCGILL.CA?body=INFO%20AUDITORY>
- List-owner: <mailto:AUDITORY-request@LISTS.MCGILL.CA>
- List-subscribe: <mailto:AUDITORY-subscribe-request@LISTS.MCGILL.CA>
- List-unsubscribe: <mailto:AUDITORY-unsubscribe-request@LISTS.MCGILL.CA>
- References: <931642565.8604344.1746793664549.JavaMail.zimbra@centrale.centralelille.fr>
- Reply-to: alsauser@xxxxxxxxxxxxxx
- Sender: AUDITORY - Research in Auditory Perception <AUDITORY@xxxxxxxxxxxxxxx>
Not sure if it is directly relevant to your inquiry, but the linked articles provides measurements on a "doubled balanced" (differential) amplifier topology that I found interesting. Best regards, Scott.
http://leonaudio.biz/double.balanced.mic.amp.notes.pdf
On Fri, 9 May 2025 14:27:44 +0200
Pierre Rodriguez <pierre.rodriguez@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> 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