Return-Path: Received: (qmail 907 invoked from network); 12 Dec 2001 19:02:33 -0000 Received: from unknown (HELO murphys-inbound.services.quay.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 12 Dec 2001 19:02:33 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 12153 invoked from network); 12 Dec 2001 19:02:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys.services.quay.plus.net with SMTP; 12 Dec 2001 19:02:22 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16EEcD-0007Un-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 12 Dec 2001 19:00:25 +0000 Received: from mrwint.cisco.com ([198.135.0.176] helo=cisco.com) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16EEcC-0007UG-00 for rsgb_lf_group@blacksheep.org; Wed, 12 Dec 2001 19:00:24 +0000 Received: from virgin.net (ams-clip-vpn-dhcp94.cisco.com [10.50.0.93]) by cisco.com (8.8.8/2.6/Cisco List Logging/8.8.8) with ESMTP id SAA17129 for ; Wed, 12 Dec 2001 18:59:07 GMT Message-ID: <3C17A882.3516A215@virgin.net> Date: Wed, 12 Dec 2001 18:57:06 +0000 From: "Stewart Bryant" X-Mailer: Mozilla 4.76 [en]C-CCK-MCD (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Chips References: <3C17885E.8063C550@netscapeonline.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Use three push-push doublers in series. minicircuits do one, but the LF spec is 50KHz, so you might have to build a discrete one for the first stage (center-tapped transformer, two-diodes and a capacitor) Stewart G3YSX gii3kev wrote: > Hello All > There are numerious chips available for dividing frequency but what is > available for multiplying, eg. > I have a W & G freq generator 200 hz - 20 khz and want to use it for > 136 khz as a driving tx source. Is there a chip device that multiplies > this up to the desired freq. > say x 8 1600 hz - 160 khz. > I am trying to avoid the convential method with descrete components, > another approach would be to mix/hetrodyne it to the desired freq with > an appropriate xtal osc cct. > All advice appreciated. > 73 de Mal/G3KEV