KR940027405A - One Chip Sounder Circuit - Google Patents

Abstract

The present invention relates to a one-chip sounder circuit, comprising: a reference clock generating means, a control means for controlling each means in accordance with a signal supplied from a microcomputer, and responds to a melody, a dial tone, and a ringing tone under the control of the generated clock and control means. A signal generating means for generating a signal, and a sound generating means for forming and outputting a final sound by using the generated signal to enable the generation of a melody sound and a ringing tone having high sound quality as well as a dial tone. There is a significant effect of making it possible to provide saving and quality chord melodies.

Description

One Chip Sounder Circuit

Since this is an open matter, no full text was included.

FIG. 3 is a block diagram of a telephone having the one-chip sounder circuit of the present invention. FIG. 4 is a detailed block diagram of the one-chip sounder circuit of the present invention. It is a block diagram.

Claims (15)

A circuit for generating sound under control of a microcomputer, comprising: a reference clock generating means; Control means for controlling each means in accordance with a signal supplied from the microcomputer; Signal generating means for generating a signal corresponding to a melody, a dial tone, and a call tone under the control of the generated clock and control means; And sound generating means for forming and outputting a final sound by using the generated signal. 2. The apparatus of claim 1, wherein the clock generating means comprises: an oscillator for generating a reference clock; And dividing means for dividing and selectively outputting the clock of the oscillator. 3. The one-chip sounder circuit according to claim 2, wherein the clock generating means can use a clock externally according to a clock read selection signal input. 3. The apparatus of claim 2, wherein the dividing means comprises: first dividing means for dividing the clock of the oscillator by two; Second dividing means for dividing the second divided signal by two again; And a multiplexer for selectively outputting the first and second divided signals under control of a control means. 2. The apparatus of claim 1, wherein the signal generating means comprises: first signal generating means for generating a tone signal of a melody and a row signal of a dial tone under the control of the microcomputer; And second signal generating means for generating a chord signal of a melody and a heat signal of a dial tone according to the control of the microcomputer. 6. The apparatus of claim 5, wherein the first signal generating means comprises: first reference signal generating means for generating a tone reference signal corresponding to a tone designated by the microcomputer and a row signal of a dial tone when dial keys are input; And tone signal generating means for dividing the generated tone reference signal to generate a tone signal corresponding to the tone octave designated by the microcomputer. 7. The one-chip sounder circuit according to claim 6, wherein the first reference signal generating means includes a first register for storing a signal corresponding to a tone supplied from a microcomputer and a signal corresponding to a key input of a dial. 7. The one-chip sounder circuit according to claim 6, wherein the tone signal generating means further comprises a tone octave register for storing a signal corresponding to an octave of tones supplied from the microcomputer. 6. The apparatus of claim 5, wherein the second signal generating means comprises: a second reference signal generating means for generating a reference signal of a chord corresponding to the chord designated by the microcomputer and a heat signal of a dial tone when dial keys are input; And a chord signal generating means for dividing the generated chord reference signal to generate a chord signal corresponding to the chord octave designated by the microcomputer. 10. The one-chip sounder circuit according to claim 9, wherein the second reference signal generating means further comprises a second register for storing a signal corresponding to the chord supplied from the microcomputer and a signal corresponding to the key input of the dial. . 10. The one-chip sounder circuit according to claim 9, wherein the chord signal generating means further comprises a chord octave register for storing a signal corresponding to the chord octave supplied from the microcomputer. 6. The one-chip sounder circuit according to claim 5, wherein the signal generating means can form a frequency of four octave 48 scales. 2. The apparatus of claim 1, wherein the sound generating means comprises: signal converting means for inputting a signal of a dial tone generated by the first and second reference signal generating means, converting the signal into an analog signal, and outputting the analog signal; The tone signal generating means and the number of chord signal generations Envelope means for enveloping the sound generated by the stage to form a melody sound and outputting it; And the DMT And signal selection means for selectively outputting signals and melodies according to the control of the microcomputer. One chip sounder circuit. The row signal of the dial tone generated by the first reference signal generating means. First signal conversion means for converting the signal into an analog signal and outputting the converted signal; And second signal converting means for inputting a column signal of the dial tone generated by the second reference signal generating means, converting the analog signal into an analog signal, and outputting the analog signal. The one-chip sounder circuit according to claim 13, wherein the signal selecting means further comprises an amplifying means for amplifying and outputting the selected signal. ※ Note: This is to be disclosed by the original application.