A push button electronic volume control circuit

Abstract

This utility model relates to the field of bonding equipment roller technology, and particularly to a button-type electronic volume control circuit, including a field-effect transistor Q1 connected in series between the signal input terminal and the signal output terminal; a capacitor C1 connected to the field-effect transistor Q1, a resistor R1 connected between the capacitor C1 and the field-effect transistor Q1, one end of the resistor R1 connected to a button S1; a button S2 connected between the button S1 and the resistor R1, one end of the button S2 connected to a resistor R2, and one end of the resistor R2 connected to one end of the capacitor C1 and grounded. Compared with the prior art, the button-type electronic volume control circuit of this utility model overcomes the contact noise problem of traditional potentiometers, does not require a dedicated volume control chip, has low cost, greatly reduces development difficulty and cycle, and is small in size with few required components.

Description

Technical Field This utility model relates to the field of roller technology for bonding equipment, and in particular to a button-type electronic volume control circuit. Background Technology Among various audio products, the "volume adjustment" function is a basic function, and consumers can make appropriate adjustments to the volume according to their listening environment and habits.

[0001] The most common way to adjust volume in existing technology is to use a potentiometer. By changing the potentiometer knob to move the sliding end to different internal positions, the impedance of the sliding end to ground is changed, thereby adjusting the volume. However, traditional potentiometers are prone to contact noise, which is not conducive to the user experience. Utility Model Content To overcome the above problems, this utility model proposes a button-type electronic volume control circuit that can effectively solve the above problems. It not only overcomes the contact noise problem of traditional potentiometers, but also does not require the use of a dedicated volume control chip, and has low cost. The development difficulty and cycle are greatly reduced, and it also has the characteristics of small size and few required components.

[0002] The present invention provides a technical solution to the above-mentioned technical problems by providing a button-type electronic volume control circuit, including a field-effect transistor Q1 connected in series between a signal input terminal and a signal output terminal; a capacitor C1 connected to the field-effect transistor Q1, a resistor R1 connected between the capacitor C1 and the field-effect transistor Q1, one end of the resistor R1 connected to a button S1; a button S2 connected between the button S1 and the resistor R1, one end of the button S2 connected to a resistor R2, and one end of the resistor R2 connected to one end of the capacitor C1 and then grounded. Preferably, the source S of the field-effect transistor Q1 is connected to the signal input terminal, and the drain D of the field-effect transistor Q1 is connected to the signal output terminal.

[0003] Preferably, the gate G of the field-effect transistor Q1 is connected to one end of the capacitor C1.

[0004] Preferably, one end of the button S1 is connected to a 5V voltage.

[0005] Preferably, button S1 is a volume up button and button S2 is a volume down button.

[0006] Compared with existing technologies, this utility model's button-type electronic volume control circuit achieves volume control using conventional components by changing the impedance across the source (S) and drain (D) of a field-effect transistor. It is suitable for home, automotive, and portable audio applications, offering wide applicability. It eliminates the need for additional ICs or other components to implement preset functions. It features low material costs, easy procurement, convenient PCB design, wide application, high reliability, and high precision. Attached Figure Description Figure 1 This is a schematic diagram of the button-type electronic volume control circuit of this utility model. Detailed Implementation To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0007] It should be noted that in this embodiment of the invention, all directional indications (such as up, down, left, right, front, back, etc.) are limited to relative positions on the specified view, rather than absolute positions.

[0008] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0009] Please see Figure 1 The present invention provides a button-type electronic volume control circuit, which includes a field-effect transistor Q1 connected in series between the signal input terminal and the signal output terminal.

[0010] The field-effect transistor Q1 is connected to a capacitor C1, and a resistor R1 is connected between the capacitor C1 and the field-effect transistor Q1. One end of the resistor R1 is connected to a button S1.

[0011] A button S2 is connected between the button S1 and the resistor R1. One end of the button S2 is connected to a resistor R2. One end of the resistor R2 is connected to one end of the capacitor C1 and then grounded.

[0012] The source S of the field-effect transistor Q1 is connected to the signal input terminal, and the drain D of the field-effect transistor Q1 is connected to the signal output terminal.

[0013] The gate G of the field-effect transistor Q1 is connected to one end of the capacitor C1.

[0014] One end of the button S1 is connected to a 5V voltage.

[0015] The button S1 is the volume up button, and the button S2 is the volume down button.

[0016] A field-effect transistor (FET) Q1 is connected in series between the input and output. S1 is the volume up button, and S2 is the volume down button. The magnitude of the input and output signals is determined by the impedance between the source and drain of the FET, which in turn is determined by the gate voltage. The volume can be adjusted by changing the gate voltage.

[0017] When S1 is pressed, the 5V voltage charges C1, which is connected to the gate of the field-effect transistor Q1, through R1. After S1 is pressed, the potential of C1 continues to rise. The increased gate voltage of Q1 leads to a lower impedance between the drain D and the source S, which can reach as low as close to 0 ohms, thus achieving maximum volume.

[0018] When S2 is pressed, R2 and R1 discharge to C1. After S2 is pressed, the potential of C1 continuously decreases. The gate voltage of Q1 decreases, which leads to a higher impedance between the drain D and the source S, which can reach up to megohms, equivalent to "opening the circuit" and achieving the minimum volume.

[0019] Pressing S1 increases the volume, increasing slightly with each press, and continuously increasing until it reaches the maximum. Pressing S2 decreases the volume, decreasing slightly with each press, and continuously decreasing until it reaches the minimum. Users can adjust the volume between the maximum and minimum to find the most suitable level.

[0020] Compared with existing technologies, this utility model's button-type electronic volume control circuit achieves volume control using conventional components by changing the impedance across the source (S) and drain (D) of a field-effect transistor. It is suitable for home, automotive, and portable audio applications, offering wide applicability. It eliminates the need for additional ICs or other components to implement preset functions. It features low material costs, easy procurement, convenient PCB design, wide application, high reliability, and high precision.

[0021] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any modifications, equivalent substitutions and improvements made within the concept of the present utility model should be included within the patent protection scope of the present utility model.

Claims

1. A button-type electronic volume control circuit, characterized in that, This includes a field-effect transistor Q1, which is connected in series between the signal input terminal and the signal output terminal; The field-effect transistor Q1 is connected to a capacitor C1, and a resistor R1 is connected between the capacitor C1 and the field-effect transistor Q1. One end of the resistor R1 is connected to a button S1. A button S2 is connected between the button S1 and the resistor R1. One end of the button S2 is connected to a resistor R2. One end of the resistor R2 is connected to one end of the capacitor C1 and then grounded.

2. The button-type electronic volume control circuit as described in claim 1, characterized in that, The source S of the field-effect transistor Q1 is connected to the signal input terminal, and the drain D of the field-effect transistor Q1 is connected to the signal output terminal.

3. The button-type electronic volume control circuit as described in claim 1, characterized in that, The gate G of the field-effect transistor Q1 is connected to one end of the capacitor C1.

4. The button-type electronic volume control circuit as described in claim 1, characterized in that, One end of the button S1 is connected to a 5V voltage.

5. The button-type electronic volume control circuit as described in claim 1, characterized in that, The button S1 is the volume up button, and the button S2 is the volume down button.

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