Boost circuit

Abstract

The present invention relates to a boost circuit, which includes a first operational amplifier, a second operational amplifier, a third operational amplifier, a first controller and a second controller. The first operational amplifier is connected to an external power supply to output a first output voltage. The second operational amplifier is connected to the external power supply to output a second output voltage. The third operational amplifier is connected to the external power supply and receives an external voltage, the first output voltage and the second output voltage to output a third output voltage from its output terminal. Among them, the first controller is connected to the input terminal of the first operational amplifier and controls the timing of its input voltage to control the first output voltage. The second controller is connected to the input terminal of the second operational amplifier and controls the timing of its input voltage to obtain the second output voltage. The present invention controls the timing of the supply voltage of the operational amplifier with a controller, so that it is always powered by a single power supply within a cycle, and the conversion between positive and negative voltages can be realized at the output terminal of the operational amplifier.

Description

Technical Field

[0001] The present invention relates to a boost circuit. Background Art

[0002] Existing operational amplifiers are divided into two types in use: 1. Single - power - supply power supply; 2. Dual - power - supply power supply. When powered by a single power supply, the output voltage of the operational amplifier is relatively high, but the output is only a single voltage (either positive or negative); when powered by a bipolar power supply, the output voltage of the operational amplifier is relatively low, and the output voltage is generally half of the single - polarity voltage, but the output can have both positive and negative voltages. These two power - supply methods limit the use of the operational amplifier and cannot simultaneously achieve a high output voltage and the conversion of positive and negative voltages. Summary of the Invention

[0003] The purpose of the present invention is to provide a boost circuit that can make the output voltage of the operational amplifier high and can achieve the conversion of positive and negative voltages.

[0004] To achieve the above - mentioned purpose, a boost circuit includes a first operational amplifier, a second operational amplifier, a third operational amplifier, a first controller, and a second controller. The first operational amplifier is connected to an external power supply to output a first output voltage from its output terminal. The second operational amplifier is connected to the external power supply to output a second output voltage from its output terminal. The third operational amplifier is connected to the external power supply and receives an external voltage, the first output voltage, and the second output voltage to output a third output voltage from its output terminal. Among them, the first controller is connected to the input terminal of the first operational amplifier and controls the timing of its input voltage to control the first output voltage, and the second controller is connected to the input terminal of the second operational amplifier and controls the timing of its input voltage to obtain the second output voltage.

[0005] Further, the first output voltage is output single - phase within a period.

[0006] Further, the second output voltage is output single - phase within a period.

[0007] Further, the controller is a single - chip microcomputer.

[0008] The beneficial effect of the present invention is that the first controller is connected to the input terminal of the first operational amplifier and controls the timing of its input voltage to control the first output voltage, and the second controller is connected to the input terminal of the second operational amplifier and controls the timing of its input voltage to obtain the second output voltage, achieving the effect that the third output voltage of the third operational amplifier is a high voltage and can achieve the conversion of positive and negative voltages.

[0009] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and be able to implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. Description of the Drawings

[0010] Figure 1 It is a schematic diagram of the boost circuit of the present invention. Detailed Embodiment

[0011] The following further describes in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0012] Please refer to Figure 1 , the boost circuit in a preferred embodiment of the present invention includes a first operational amplifier U1, a second operational amplifier U2, a third operational amplifier U3, a first controller, and a second controller. The first operational amplifier U1 is connected to an external power supply to output a first output voltage from its output terminal. The second operational amplifier U2 is connected to an external power supply to output a second output voltage from its output terminal. The third operational amplifier U3 is connected to an external power supply and receives an external voltage, the first output voltage, and the second output voltage to output a third output voltage from its output terminal. Among them, the first controller is connected to the input terminal of the first operational amplifier U1 and controls the timing of its input voltage to control the first output voltage. The second controller is connected to the input terminal of the second operational amplifier U2 and controls the timing of its input voltage to obtain the second output voltage. In this embodiment, the first controller controls the timing of the input voltage of the first operational amplifier U1 such that the first output voltage is single-phase output within a period. The second controller controls the timing of the input voltage of the second operational amplifier U2 such that the second output voltage is single-phase output within a period. When the value of the first output voltage is not 0 (i.e., the first operational amplifier U1 has an output), the value of the second output voltage is 0, and vice versa. The waveform of the external voltage output by the external power supply connected to the third operational amplifier U3 is the same as the waveforms of the input voltages of the first operational amplifier U1 and the second operational amplifier U2 after being controlled by the controller. In this embodiment, the controller is a single-chip microcomputer.

[0013] The working process of the present invention is as follows: The first output voltage output by the first operational amplifier U1 and the second output voltage output by the second operational amplifier U2 provide precise voltages for the third operational amplifier U3. The first controller controls the timing of the input voltage of the first operational amplifier U1, and the second controller controls the timing of the input voltage of the second operational amplifier U2 to ensure that the first output voltage and the second output voltage are output single-phase within a period. The output waveform of the external voltage connected to the third operational amplifier U3 is the same as the waveform of the input voltages of the first operational amplifier U1 and the second operational amplifier U2 after being controlled by the controller. Then, the third output voltage is a dual voltage, and the voltage value is twice the voltage value output when powered by a normal single-polarity power supply.

[0014] In summary: The first controller is connected to the input terminal of the first operational amplifier U1 and controls the timing of its input voltage to control the first output voltage. The second controller is connected to the input terminal of the second operational amplifier U2 and controls the timing of its input voltage to obtain the second output voltage, achieving the effect that the third output voltage of the third operational amplifier U3 is a high voltage and the conversion between positive and negative voltages can be realized.

[0015] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0016] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A boost circuit, characterized in that, the boost circuit includes a first operational amplifier, a second operational amplifier, a third operational amplifier, a first controller and a second controller. The first operational amplifier is connected to an external power supply to output a first output voltage from its output terminal. The second operational amplifier is connected to the external power supply to output a second output voltage from its output terminal. The third operational amplifier is connected to the external power supply and receives an external voltage, the first output voltage and the second output voltage to output a third output voltage from its output terminal. Wherein, the first controller is connected to the input terminal of the first operational amplifier and controls the timing of its input voltage to control the first output voltage. The second controller is connected to the input terminal of the second operational amplifier and controls the timing of its input voltage to obtain the second output voltage; when the first operational amplifier has an output, the second operational amplifier has no output; when the second operational amplifier has an output, the first operational amplifier has no output; the first controller controls the timing of the input voltage of the first operational amplifier U1 so that the first output voltage is output in a single phase within a period. The second controller controls the timing of the input voltage of the second operational amplifier U2 so that the second output voltage is output in a single phase within a period; the waveform of the external voltage output by the external power supply connected to the third operational amplifier U3 is consistent with the waveforms of the input voltages of the first operational amplifier U1 and the second operational amplifier U2 after being controlled by the controller.

2. The boost circuit according to claim 1, characterized in that, the controller is a single-chip microcomputer.

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