Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Sat, 22 Feb 2020 09:33:42 -0800 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 01MHNuYV029976; Sat, 22 Feb 2020 12:24:23 -0500 Received: from outgoing-exchange-3.mit.edu (OUTGOING-EXCHANGE-3.MIT.EDU [18.9.28.13]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 01MHNs4X029973 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Sat, 22 Feb 2020 12:23:54 -0500 Received: from oc11exedge2.exchange.mit.edu (OC11EXEDGE2.EXCHANGE.MIT.EDU [18.9.3.18]) by outgoing-exchange-3.mit.edu (8.14.7/8.12.4) with ESMTP id 01MHNHlT023609 for ; Sat, 22 Feb 2020 12:23:18 -0500 Received: from w92expo6.exchange.mit.edu (18.7.74.60) by oc11exedge2.exchange.mit.edu (18.9.3.18) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Sat, 22 Feb 2020 12:23:44 -0500 Received: from oc11exhyb8.exchange.mit.edu (18.9.1.113) by w92expo6.exchange.mit.edu (18.7.74.60) with Microsoft SMTP Server (TLS) id 15.0.1365.1; Sat, 22 Feb 2020 12:23:54 -0500 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (104.47.58.109) by oc11exhyb8.exchange.mit.edu (18.9.1.113) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Sat, 22 Feb 2020 12:23:53 -0500 Received: from MN2PR01CA0059.prod.exchangelabs.com (2603:10b6:208:23f::28) by DM5PR0102MB3384.prod.exchangelabs.com (2603:10b6:4:a4::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2729.31; Sat, 22 Feb 2020 17:23:52 +0000 Received: from CO1NAM03FT038.eop-NAM03.prod.protection.outlook.com (2a01:111:f400:7e48::206) by MN2PR01CA0059.outlook.office365.com (2603:10b6:208:23f::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2750.21 via Frontend Transport; Sat, 22 Feb 2020 17:23:51 +0000 Received: from NAM12-DM6-obe.outbound.protection.outlook.com (40.92.22.23) by CO1NAM03FT038.mail.protection.outlook.com (10.152.81.212) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2750.18 via Frontend Transport; Sat, 22 Feb 2020 17:23:51 +0000 Received: from DM6NAM12FT034.eop-nam12.prod.protection.outlook.com (2a01:111:e400:fc64::39) by DM6NAM12HT189.eop-nam12.prod.protection.outlook.com (2a01:111:e400:fc64::272) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2729.10; Sat, 22 Feb 2020 17:23:50 +0000 Received: from BYAPR02MB4055.namprd02.prod.outlook.com (10.13.178.56) by DM6NAM12FT034.mail.protection.outlook.com (10.13.178.63) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2772.6 via Frontend Transport; Sat, 22 Feb 2020 17:23:50 +0000 Received: from BYAPR02MB4055.namprd02.prod.outlook.com ([fe80::f964:6ae7:834b:8fa7]) by BYAPR02MB4055.namprd02.prod.outlook.com ([fe80::f964:6ae7:834b:8fa7%5]) with mapi id 15.20.2729.033; Sat, 22 Feb 2020 17:23:50 +0000 From: Bob Blick To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Sat, 22 Feb 2020 09:23:50 -0800 Subject: Re: [EE] Simulating a push pull converter Thread-Topic: [EE] Simulating a push pull converter Thread-Index: AQHV6WJE7ELPc10takmLL0RJUiYW1KgndlzZ Message-ID: References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US Content-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: acceptlanguage: en-US received-spf: Pass (protection.outlook.com: domain of outlook.com designates 40.92.22.23 as permitted sender) receiver=protection.outlook.com; client-ip=40.92.22.23; helo=NAM12-DM6-obe.outbound.protection.outlook.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=outlook.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=ucRWJ3TH+9ZpJaTVgSff2SnJ9PlE4yK3ZKhBpetgXNI=; b=EgoilQymnZXiP4e7f7Q8i0HQBy+rBvlFerPZMjgsyyEsHhKJ1ZILC3aT6MDmCv6+yKeWnLBGKM//YgJGM3LqM38keSMbESEb4vy9Aw62seuJx2mZVN3VgNRhY9FSzixa+C86rmwbvVvWcAoTksTRbtqyZODcVX+WrRb7UqhVNGyNoo8JH9JWO2y/SEyqaFBhGMM6RZidjk9e24f86Q6M0l0VMEqE+V+15TnV9e37KjPhnnEZGzpy++5GgllSoSWvkhc6WGe+TlLSXRpqwkw7E7bOPauqj2rH30ND9utAas+XYlQVbrQoWxAt8X3LTUgVknXVmi8s83RJfilFq1gS+w== authentication-results: spf=pass (sender IP is 40.92.22.23) smtp.mailfrom=outlook.com; mit.edu; dkim=pass (signature was verified) header.d=outlook.com;mit.edu; dmarc=pass action=none header.from=outlook.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-topics: [EE] x-mime-autoconverted: from quoted-printable to 8bit by PCH.mit.edu id 01MHNs4X029973 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Greetings Manu, LTSpice always needs to have a rise and fall time specified for all pulse s= ources. Make them some tiny value, say 0.01u and everything works fine. Cheerful regards, Bob ________________________________________ From: piclist-bounces@mit.edu on behalf of Manu A= braham Sent: Saturday, February 22, 2020 1:17 AM To: Microcontroller discussion list - Public. Subject: [EE] Simulating a push pull converter Hi, Simulating a push pull converter in LTSpice, I get an asymmetric output swi= ng. Any thoughts, why the swing is asymmetric ? Thanks, Manu --=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 .