電話振鈴之改革

Title:	電話振鈴之改革 An Innovative Ringing Technique in Telephone System—The Electronic Tone Ringer
Authors:	張天鵬 Tian-Pong Chang
Issue Date:	Dec-1976
Abstract:	A new electronic tone ringer is presented. Basically the circuit of the new ringer can be drived by a 3.5 KHz ringing source, 3 volts in amplitude. The new ringer has the advantages over the convenntional magneto bell ringer in the following respects. System reliability, flatness of frequency response, weight and cost. A prototype was built and tested with satisfactory results.
URI:	http://hdl.handle.net/11536/137583
Journal:	交通大學學報 The Journal of National Chiao Tung University
Volume:	2
Begin Page:	252
End Page:	=O56-1
Appears in Collections:	The Journal of National Chiao Tung University

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