Article View: sci.electronics
Article #7687Re: Ring signal generation (was DTMF Decoder IC)
From: Henry Spencer
Date: Wed, 10 Oct 1990 15:14
Date: Wed, 10 Oct 1990 15:14
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In article <9770@uhccux.uhcc.Hawaii.Edu> whinery@hale.ifa.hawaii.edu (Alan Whinery) writes: >To emulate this? Your ringer would probably eat 60 hz, but you'd have to >knock down the voltage a little, and it would sound funny. The likelihood >that there is a high Q 20 hz filter in a phone is relatively slim. .. Unfortunately, there is: "classic" phones have mechanically-resonant ringers that really do want something fairly close to specs. (What, you were expecting an *electronic* filter? Don't be silly. :-)) What the cheap electronic phones will take is another question. -- Imagine life with OS/360 the standard | Henry Spencer at U of Toronto Zoology operating system. Now think about X. | henry@zoo.toronto.edu utzoo!henry
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!utzoo!henry From: henry@zoo.toronto.edu (Henry Spencer) Subject: Re: Ring signal generation (was DTMF Decoder IC) Message-ID: <1990Oct10.151422.6001@zoo.toronto.edu> Organization: U of Toronto Zoology References: <14793@mentor.cc.purdue.edu> <27114b84-483.1sci.electronics-1@vpnet.chi.il.us> <14913@mentor.cc.purdue.edu> <9770@uhccux.uhcc.Hawaii.Edu> Date: Wed, 10 Oct 90 15:14:22 GMT