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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 507

Telephone ring-tone generation

Dale Eagar

Abstract

A telephone ring tone generator is described.

Keywords

Telephone ring tone

LT1491

Requirements

When your telephone rings, exactly what is the phone company doing? This question comes up frequently, as it seems everyone is becoming a telephone company. Deregulation opens many new opportunities, but if you want to be the phone company you have to ring bells.

An open-architecture ring-tone generator

Here is a design that you can own, tailor to your specific needs, layout on your circuit board and put on your bill of materials. Finally, you will be in control of the black magic (and high voltages) of ring-tone generation.

Not your standard bench supply

Ring-tone generation ...

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