Multistage amplification circuit

Abstract

The utility model discloses a multistage amplification circuit, comprising an input port used for receiving an external signal; the output port is used for outputting the amplified signal; the at least one switch element is connected to the input port and is used for controlling the on-off of a signal; the first-stage amplification unit comprises a first transistor, and a bias resistor and a coupling capacitor which are connected in series with the first transistor; the second-stage amplification unit comprises a second transistor, a bias resistor and a coupling capacitor, the bias resistor and the coupling capacitor are connected with the second transistor in series, and the output of the first-stage amplification unit is connected to the input of the second-stage amplification unit through the coupling capacitor. According to the utility model, the coupling capacitor and the decoupling capacitor are used in each stage of amplification unit, so that the direct-current component can be isolated, and the mutual influence among the stages of amplification circuits is reduced; the system is simple in structure, lower in production and maintenance cost, convenient to integrate with other circuits or systems, high in compatibility and better in customizability and flexibility.

Description

Technical Field

[0001] This utility model relates to the fields of photovoltaic and visible light communication technology, and in particular to a multi-stage amplifier circuit. Background Technology

[0002] The core objective of transdielectric solar panels is to achieve efficient light absorption and electricity generation under different physical media or environmental conditions. This means that solar panels must not only operate in conventional atmospheric environments, but also adapt to changes in light intensity underwater, in extreme climates, or other special environments.

[0003] To improve the efficiency of solar panels, especially in low-light and cross-medium environments, the design of signal amplification circuits is crucial. The current and voltage signals output by solar panels are often low, therefore requiring amplification to effectively drive loads or store signals. At the output of the solar panel, high-efficiency operational amplifiers (Op-Amps) and power amplifiers (PAs) are needed to stably amplify weak electrical signals and effectively improve system efficiency.

[0004] The main function of the amplifier circuit is to amplify or adjust the DC voltage signal output by the solar panel to meet the load requirements. It also regulates the stability and adaptability of the output signal to ensure compatibility with subsequent circuits or equipment. The core objective of transdielectric solar panels is to achieve efficient light absorption and power generation under different physical media or environmental conditions. This means that solar panels must not only operate in conventional atmospheric environments but also adapt to changes in light intensity underwater, in extreme climates, or other special environments. However, existing amplifier circuits have low light absorption efficiency under different media and are susceptible to various interferences such as underwater electromagnetic interference and air humidity, which affect the stability and signal quality of the amplifier circuit. Changes in geographical location, climate, and light conditions can all lead to signal transmission disturbances. Utility Model Content

[0005] The purpose of this invention is to solve the above problems and provide a multi-stage amplifier circuit with strong compatibility, stable output, and sufficient power to drive the load.

[0006] To solve the above-mentioned technical problems, this utility model discloses a multi-stage amplifier circuit, comprising:

[0007] Input port, used to receive external signals;

[0008] The output port is used to output the amplified signal;

[0009] At least one switching element is connected to the input port for controlling the on / off state of the signal;

[0010] A first-stage amplification unit, comprising a first transistor, and a bias resistor and a coupling capacitor connected in series with the first transistor;

[0011] The secondary amplification unit includes a second transistor, a bias resistor and a coupling capacitor connected in series with the second transistor, and the output of the primary amplification unit is connected to the input of the secondary amplification unit through the coupling capacitor.

[0012] Preferably, it further includes a three-stage amplification unit, which includes a third transistor, a bias resistor and a coupling capacitor connected in series with the third transistor, and the output of the second-stage amplification unit is connected to the input of the third-stage amplification unit through the coupling capacitor.

[0013] Preferably, it further includes a power decoupling unit, which includes at least one decoupling capacitor for reducing power supply noise.

[0014] Preferably, the input port is connected to the first-stage amplification unit via a high-pass filter, the high-pass filter comprising a resistor and a capacitor.

[0015] Preferably, a coupling capacitor for isolating DC components is provided between the first-stage amplification unit and the second-stage amplification unit.

[0016] Preferably, the three-stage amplification unit is a transistor, used to provide high input impedance and low output impedance.

[0017] Preferably, the decoupling capacitors in the power supply decoupling unit are connected in parallel with the power supply pins of each stage of the amplification unit to improve the stability of the circuit.

[0018] Preferably, a coupling capacitor for signal coupling is provided between the first-stage amplification unit and the second-stage amplification unit.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The multi-stage amplifier circuit of this invention provides high voltage or current gain and a wide frequency response range, capable of handling signals of different frequencies. By using coupling and decoupling capacitors in each stage of the amplifier, DC components are isolated, reducing mutual interference between stages and improving circuit stability. Bias circuits and decoupling capacitors effectively reduce noise introduced during amplification, improving the signal-to-noise ratio (SNR). The third-stage amplifier uses a transistor (FET), providing high input impedance and low output impedance, reducing the load effect on the signal source, and enhancing the ability to drive subsequent circuits. It also offers high flexibility, allowing adjustment of the gain of each stage to adapt to different application environments. The use of discrete components results in lower production and maintenance costs, and modular design and integration facilitate integration with other circuits or systems, offering strong compatibility and better customizability and flexibility. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the multi-stage amplifier circuit of this utility model. Detailed Implementation

[0022] To illustrate the technical features, objectives, and effects of this utility model in detail, the following description, in conjunction with the accompanying drawings and embodiments, provides a further detailed explanation. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model. Example

[0023] Please see the appendix Figure 1 A multi-stage amplifier circuit includes: an input port (RX+, RX-) for receiving external signals; an output port (OUT) for outputting amplified signals; at least one switching element (JRX1) connected to the input port for controlling the on / off state of the signal; a first-stage amplifier unit, comprising a first transistor (Q3) and bias resistors (R2, R7) and coupling capacitors (C1, C2) connected in series with the first transistor (Q3); and a second-stage amplifier unit, comprising a second transistor (Q2) and bias resistors (R6, R12) and coupling capacitors (C3, C7) connected in series with the second transistor (Q2). The output of the first-stage amplifier unit is connected to the input of the second-stage amplifier unit through the coupling capacitor (C2). The signal is output after passing through the two-stage amplifier circuit, providing high voltage or current gain, and has a wide frequency response range, capable of handling signals of different frequencies.

[0024] Preferably, the system further includes a three-stage amplification unit, which includes a third transistor (Q1), a bias resistor (R9) and coupling capacitors (C4, C8) connected in series with the third transistor (Q1). The output of the second-stage amplification unit is connected to the input of the third-stage amplification unit through the coupling capacitor (C4), and the output of the third-stage amplification unit is connected to the output port (OUT). This connection method ensures effective signal transmission between the amplification units, while the coupling capacitors achieve AC coupling of the signal and isolate the DC component. The signal is further amplified by the three-stage amplification circuit, improving signal stability and output quality; the third-stage amplification unit is a transistor (FET), providing high input impedance and low output impedance.

[0025] Preferably, the circuit also includes a power supply decoupling unit, which includes at least one decoupling capacitor (C5, C6, C7, C8) to reduce power supply noise and improve the signal-to-noise ratio (SNR). The decoupling capacitors (C5, C6, C7, C8) in the power supply decoupling unit are connected in parallel with the power supply pins of each stage of the amplification unit to improve the stability of the circuit.

[0026] Preferably, the input port is connected to the first-stage amplifier unit via a high-pass filter, which includes a resistor (R10) and a capacitor (C10). A coupling capacitor (C2) for isolating DC components and a coupling capacitor (C11) for signal coupling are also provided between the first-stage and second-stage amplifier units. This reduces mutual interference between the amplifier stages, improves circuit stability, and adapts to different application environments. Utilizing discrete components results in lower production and maintenance costs. Furthermore, modular design and integration are possible as needed, facilitating integration with other circuits or systems, offering strong compatibility, better customizability, and flexibility. Example

[0027] In a solar panel application, a multi-stage amplifier circuit is used to process the voltage and current signals output by the panel. Through Maximum Power Point Tracking (MPPT) technology, the circuit can adjust its operating point in real time, ensuring the panel always operates near its maximum power point, thereby maximizing energy output. Simultaneously, through current matching and power matching techniques, the circuit ensures that the panel's output matches the load's demands, preventing energy waste or equipment damage. Example

[0028] In underwater communication systems, multi-stage amplifier circuits are used to amplify the received weak signals. By using large-area solar panels, the system can effectively improve the light signal reception capability and compensate for the attenuation of the light signal during transmission across media, such as underwater and air. The use of monocrystalline silicon solar panels further improves the light energy conversion efficiency, ensuring the long-term stable operation of the system.

[0029] The present invention and its embodiments have been described in detail above. This description is not restrictive, and the accompanying drawings only show some embodiments of the present invention. The actual structure is not limited thereto. Those skilled in the art, inspired by this description, can make various modifications, improvements, and substitutions without departing from the concept of the present invention, and all of these should fall within the protection scope of the present invention.

Claims

1. A multi-stage amplification circuit, characterized by, Comprising: an input port for receiving an external signal; an output port for outputting an amplified signal; at least one switching element connected to the input port for controlling the on-off of the signal; a first amplification unit, the first amplification unit comprising a first transistor, and a bias resistor and a coupling capacitor connected in series to the first transistor; a second amplification unit, the second amplification unit comprising a second transistor, and a bias resistor and a coupling capacitor connected in series to the second transistor, the output of the first amplification unit being connected to the input of the second amplification unit through the coupling capacitor.

2. The multi-stage amplification circuit of claim 1, wherein, Further comprising a third amplification unit, the third amplification unit comprising a third transistor, and a bias resistor and a coupling capacitor connected in series to the third transistor, the output of the second amplification unit being connected to the input of the third amplification unit through the coupling capacitor.

3. The multi-stage amplification circuit of claim 2, wherein, Further comprising a power supply decoupling unit, the power supply decoupling unit comprising at least one decoupling capacitor.

4. The multi-stage amplification circuit of claim 3, wherein, The input port is connected to the first amplification unit through a high-pass filter, the high-pass filter comprising a resistor and a capacitor.

5. The multi-stage amplification circuit of claim 3, wherein, A coupling capacitor for isolating direct current components is provided between the first amplification unit and the second amplification unit.

6. The multi-stage amplification circuit of claim 3, wherein, The third amplification unit is a transistor.

7. The multi-stage amplification circuit of claim 3, wherein, The decoupling capacitors in the power supply decoupling unit are connected in parallel to the power supply pins of the amplification units respectively.

8. The multi-stage amplification circuit of claim 3, wherein, A coupling capacitor for signal coupling is provided between the first amplification unit and the second amplification unit.

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