JPS5929876B2 - electronic chime - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic chime, and its purpose is to obtain various audio outputs depending on the way the push button is operated, and to generate audio only when the push button is operated under certain conditions. This provides an electronic chime with output.

For example, if the intermittent sound when the button is pressed twice to turn it on changes depending on the slowness of the sound, when the first and second turn-on operations are performed in succession,
The changed sound may be recognized as a failure of the electronic chime itself, which poses a problem in use.

The present invention has been made in view of the above-mentioned problems and as a countermeasure thereof.

The electronic chime of the present invention will be described below with reference to the drawings listed as examples.A is a push button, which turns on when pressed by manual operation and turns off when released. One pulse is emitted with each on/off operation. This push button A is connected between a count circuit B and a power source E. Count circuit B consists of flip-flops FFI, FF2, and flip-flop F connected to a transistor Trl that is turned on by one pulse of push button A.
It consists of a gate G connected to F2.

The gate G connects the NAND gate NAND1 to the input/output terminal of the flip-flop FF2, and the NAND gate NAND2 via the inverter INI so that the input/output of the NAND gates NAND1, 2, and 3 connected to the flip-flop FF2 becomes the truth table shown in FIG. The NAND gate NAND3 is connected to the input and output terminals of the flip-flop FF2 via the inverter IN2, respectively.
NANDI, 2, 3 output inverter INA, B, C
The inverted output is input to the sound generating circuit C as a control signal.

The sound generation circuit C includes a reference oscillator that generates a square wave output serving as a reference frequency, a frequency dividing circuit that divides the reference frequency, and a modulation circuit that modulates the frequency-divided output into an audio output. Therefore, the frequency-divided output is changed.

A constant time/curse generating circuit D is provided to provide the width of the counter signal and a reset signal for the flip-flop FFI3FF2 of the counter circuit B.

This constant time pulse generation circuit D includes a transistor Tr2,
A time pulse generation circuit D1, which generates a pulse with a long time width, is composed of a capacitor Cl and a resistor, and a transistor T.
A short time width consisting of r2, capacitor C2, and resistance.
The collector of the transistor Tr2 of the constant time pulse generation circuit D1 is connected to the input terminal of the flip-flop FFl, and the collector of the transistor Trl of the clear signal generation circuit D2 is connected to the flip-flop FFl. and is connected to the clear terminal of FF2.

(Not shown) F is a sound drive circuit, which is composed of an adjustment resistor, an output transistor, and a sound conversion device F, and is driven by the modulated output of the sound generation circuit C.

G is a power supply holding circuit, in which transistor Tr4 is turned on by one pulse of push button A, and voltage is applied to counter circuit B, sound generation circuit C, pulse generation circuit D for a certain period of time, and audio drive circuit F, and sound is generated. When the transistor Tr5 is turned on by the NAND output of the circuit C, the transistor Tr4 is turned off to disconnect the power supply circuit. Then,
Even if a large number of pulses are given by push button A, the pulse output from counting circuit B will only be output for a period of two determined by the time width pulse of constant time pulse generation circuit D1, as shown in Figure 4. Becomes X.

Now, as shown in Fig. 5, when one pulse signal is generated by the push button A, the power holding circuit G is turned on, and the count circuit B, the sound generating circuit C, and the pulse generating circuit D1 are activated for a certain period of time.
, applies a voltage to the audio drive circuit F.

By one pulse of push button A, flip-flops FFl and FF2 of count circuit B are cleared by the output of clear signal generation circuit D2, and even if a pulse is sent again within the time width by time pulse generation circuit D1, the change will not occur. There isn't.

The outputs of the flip-flops FFl and FF2 both go to the H'' level and are input to the gate circuit G. For one pulse of this push button A, as shown in the truth table of FIG.
The output of ANDl becomes 'L'7, the output of inverter INA becomes 'H2', the output terminal a becomes 'H'5 level, and the other output terminals B and c become 'L' level. Using the SH7 level of the output terminal G as a control signal, the time width of the modulated output can be determined by taking out a NAND output with a signal from a frequency dividing stage having a flip-flop configuration of the sound generating circuit C, for example. Next, when push button A is used to send a pulse signal twice, as shown in FIG. After that, it becomes L/' level, and flip-flop FF2 becomes H2 level.

Therefore, the output terminal of counter circuit B, which has been inverted by gate circuit G, becomes H'' level, and the other output terminals A and c become L'' level.
level, so it becomes an H'' level control signal from output terminal b, controls the frequency dividing circuit and modulation circuit of sound generation circuit C, and drives sound 1 to produce a sound different from that of one pulse of push button A. Next, when push button A is used to send a pulse signal three times, the output of flip-flop FFl becomes H7 level again as shown in Figure 7, and output terminals A and b of counter circuit B become L'' level, the output terminal C becomes H'' level, and the control signal can be changed.

The detailed operation of the NAND gates NANDl, 2, and 3 is shown in the table below. As described above, according to the electronic chain of the present invention, a counter circuit that counts the ON operation of a push button with the time width of a constant pulse generation circuit is used, and different control signals are generated from the gate output of the counter circuit to control the operation. By configuring the signal to control the sound generation circuit made up of a frequency dividing circuit and a modulation circuit, even if push button A continuously generates pulses, the constant pulse generation circuit will control the sound generation circuit. A different control signal can be obtained by counting only the number of pulses within the time width, and if there is a pulse signal that exceeds the time width, it must be counted again in the next time width. By combining the pulse generated by pressing the button and the pulse generated at each width over the time width, various generated sounds can be obtained, and an electronic chime that gives different sounds and can be clearly identified can be obtained. .

[Brief explanation of the drawing]

The figure shows an embodiment of the electronic chime of the present invention. Fig. 1 is a block diagram, Fig. 2 is a main electrical circuit diagram, Fig. 3 is a truth table showing the output of a NAND gate, Fig. 4 is a diagram showing the pulse output of a push button, a fixed time pulse generation circuit, and a counter circuit. FIG. 5 is a diagram of the pulse output of each part when the push button is pressed with one pulse, FIG. 6 is a diagram of the pulse output of each part when the push button is pressed with two pulses, and FIG. 7 is a diagram of the pulse output of each part when the push button is pressed with three pulses.
A...Push button, B...Count circuit, C
... Sound generation circuit, D ... Constant pulse generation circuit, E ... Power supply, F ... Sound 1 drive circuit.

Claims (1)

[Claims] 1. A count circuit that memorizes the ON operation of a push button, a power supply holding circuit that applies a power supply voltage to the circuit according to the output of the count circuit, and a control signal of the count circuit that sets the operation and starts driving. and a voice control circuit that disconnects the power supply holding circuit after the drive ends;
An electronic chime comprising an output circuit that notifies a chime sound via a voice conversion device based on the output of the voice control circuit.