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Sender: "piclist-bounces@mit.edu" Date: Sat, 23 May 2020 13:11:04 -0700 Subject: Re: [EE] MOSFET Gate Voltage Thread-Topic: [EE] MOSFET Gate Voltage Thread-Index: AdYxP9sgMF8bU4HTQrGxiG16VU9Srg== Message-ID: References: <4e48b07d99a1a37468b1b69b6c5d0812.squirrel@mai.hallikainen.org> List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: <4e48b07d99a1a37468b1b69b6c5d0812.squirrel@mai.hallikainen.org> Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of gmail.com designates 209.85.166.42 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.166.42; helo=mail-io1-f42.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=jk99lgcfJDbuyeRAyMXXrFmzRzANM8XZ7s7xWXctBzc=; b=WKOBLhOtkKAchOIsqHm/nsSe1aLgvzxKh559ZLAdcQjQKBsm02wHVv0mwUNMZgKK6g KY2zDOUUoUYrJeLnfUMRglPwwhMSTGuS3U7NfrYt5OlfIFLShO1ROpUthvG0wfiR6m5T r1U+jjiqJnJ/sIpc4+PN8pHPA62qh74oaN8fVbxg28QUStNYN6E68c5u10DEaFPCTldU 0U7/pQYfL7o/VIIi6Qr6+Aqglil3ii1MMOqXbyoNvO5V9tlWJGFyNE2plMXC/7I3uFIF FKsWB5+2UE2eY0wEpl86vwF33C5gtG0S0IE9pWRwd18mFwSzi09ZvPSOnEUHOxeA13Pa i1VA== authentication-results: spf=pass (sender IP is 209.85.166.42) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=gmail.com;mit.edu; dmarc=pass action=none header.from=gmail.com;compauth=pass reason=100 errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:a02:4d:: with SMTP id 74mr13617455jaa.141.1590264690951; Sat, 23 May 2020 13:11:30 -0700 (PDT) x-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 On Sat, May 23, 2020 at 2:15 PM Harold Hallikainen wrote: > I'd certainly look at the datasheet of the FET. But, in general, I see > nothing wrong with the gate voltage being higher than the drain voltage. > In fact, that is a typical condition once a FET is switched on. Thank you Harold and Jason, Since this is an existing mass produced product I'm a bit limited in figuring out what the transistor is. It's an SO-23 package marked AOH. I did a bit of searching and while I did find a fascinating website on the Ancient Order of Hibernians, I haven't found a datasheet for this one yet. I also haven't come across a transistor marking guide. Thanks! Josh --=20 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .