Method for improving power amplifier circuit
By dividing the power amplifier circuit into a signal decomposition sub-circuit and a signal amplifier sub-circuit, and connecting it with an optocoupler, the problem of distortion and complexity of the power amplifier circuit in the prior art is solved, and the efficiency of circuit simplification and signal amplification is achieved promote.
Patent Information
- Application Number
- CN202411653360.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-02-25
AI Technical Summary
Existing power amplifier circuits are prone to distortion during signal amplification, and the circuit complexity is high, making it difficult to simplify.
By dividing the power amplifier circuit into a signal decomposition sub-circuit and a signal amplification sub-circuit, and connecting two parts of the sub-circuits with an optocoupler, the signal decomposition and amplification are achieved.
The circuit structure is simplified, the occurrence of distortion is reduced, and the efficiency of signal amplification is improved.
Smart Images
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Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of amplifiers, and in particular relates to a power amplifier circuit. Background Art
[0002] The optocoupler is an electrical-to-optical-to-electrical conversion device that uses light as a medium to transmit electrical signals. It has a good isolation effect on input and output electrical signals. Summary of the invention
[0003] The invention provides a method for improving a power amplifier circuit, which achieves the purpose of simplifying the circuit and reducing distortion by applying a photoelectric coupler to the power amplifier circuit.
[0004] The improvement method is: 1. Divide the power amplifier circuit into two parts: a signal decomposition subcircuit and a signal amplification subcircuit, and the two subcircuits are connected by a photoelectric coupler; 2. The circuit working process is, first, in the signal decomposition subcircuit, decompose the input signal into multiple sub-signals, then, through different photoelectric couplers, transmit the above sub-signals to the signal amplification subcircuit respectively, and finally, in the signal amplification subcircuit, amplify the above sub-signals respectively and synthesize them into output signals. BRIEF DESCRIPTION OF THE DRAWINGS
[0005] Figure 1 A circuit diagram of embodiment 1 of the present invention is provided.
[0006] Figure 2 A circuit diagram of a second embodiment of the present invention is provided. DETAILED DESCRIPTION
[0007] Embodiment 1 like Figure 1 As shown, this is an improved circuit of a Class AB power amplifier. The key points to pay attention to are: 1. In the signal decomposition subcircuit, bias current is added to avoid crossover distortion; 2. In the signal amplification subcircuit, there is no need to use a pair of tubes (a pair of matched NPN and PNP transistors).
[0008] Embodiment 2 like Figure 2 As shown, this is also an improved circuit of a Class AB power amplifier. The key point to be noted is that, compared with the first embodiment, only a single power supply voltage is required.
Claims
1. A method for improving a power amplifier circuit, characterized in that:
1. The power amplifier circuit is divided into two parts: a signal decomposition subcircuit and a signal amplification subcircuit, and these two subcircuits are connected by a photoelectric coupler; 2. The circuit working process is, first, in the signal decomposition subcircuit, the input signal is decomposed into multiple sub-signals, then, through different photoelectric couplers, the above sub-signals are respectively transmitted to the signal amplification subcircuit, and finally, in the signal amplification subcircuit, the above sub-signals are respectively amplified and synthesized into an output signal.