Article View: sci.electronics
Article #924Re: Sine wave generator
From: Paul Cohen
Date: Fri, 21 Jul 1989 13:18
Date: Fri, 21 Jul 1989 13:18
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NEC has a line of speech generation components which can also be programmed to generate various tones of which a sine wave (up to about 3 KHz) would be the simplest example. DTMF signals are examples of somewhat more complex sounds that are possible. Code for the DTMF signals is available as a library. Since so many frequencies are possible, sine waves would have to be custom programmed, but this is not difficult. An open question for the readers of this news-group: what frequencies of sine waves do you want? We could add them to our library fairly easily. The parts, uPD775x (x = 5, 6, 7) come as mask ROM parts with various sizes of ROM. There is also a version, uPD7759 which uses external memory (RAM or ROM) and a one-time programmable version the uPD77P56. All of these parts include a D/A and filter circuitry and require only an external ceramic resonator for clocking. Call (508) 655-8833 or (800) 366-3782 for more information.
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arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!cica!iuvax!purdue!haven!decuac!shlump.dec.com!decwrl!decvax!ima!mirror!necntc!pecReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!cica!iuvax!purdue!haven!decuac!shlump.dec.com!decwrl!decvax!ima!mirror!necntc!pec From: pec@necntc.nec.com (Paul Cohen) Newsgroups: sci.electronics Subject: Re: Sine wave generator Keywords: Sine wave generator Message-ID: <28373@necntc.nec.com> Date: 21 Jul 89 13:18:54 GMT References: <790@serene.UUCP> Reply-To: pec@necntc.UUCP (Paul Cohen) Organization: NEC Electronics Inc. Natick, MA 01760 Lines: 20