2sa1943 2sc5200 Power Amplifier Circuit

By | September 24, 2023

2SA1943 2SC5200 Power Amplifier Circuit

The 2SA1943 and 2SC5200 are a popular combination of NPN and PNP transistors that are often used in audio power amplifiers. This article will discuss the design of a simple power amplifier circuit using these transistors. ### Circuit Diagram The following diagram shows the circuit of a simple class AB power amplifier using the 2SA1943 and 2SC5200 transistors: [Image of circuit diagram] The input signal is applied to the base of the 2SA1943 transistor, which amplifies the signal and drives the collector current. The collector current flows through the output transformer, which converts the signal from a single-ended to a push-pull output. The 2SC5200 transistor is used as a complementary output stage, which provides the necessary bias for the 2SA1943 transistor and helps to improve the amplifier's efficiency. ### Components The following components are required to build the amplifier circuit: * 2SA1943 NPN transistor * 2SC5200 PNP transistor * 100 Ω resistor * 1 kΩ resistor * 10 kΩ resistor * 0.1 μF capacitor * 10 μF capacitor * 100 μF capacitor * 220 μF capacitor * Output transformer * Power supply ### Construction The amplifier circuit can be constructed on a piece of perfboard or stripboard. The following steps show how to build the circuit: 1. Solder the transistors, resistors, and capacitors to the perfboard or stripboard. 2. Connect the input signal to the base of the 2SA1943 transistor. 3. Connect the collector of the 2SA1943 transistor to the primary winding of the output transformer. 4. Connect the emitter of the 2SA1943 transistor to the 100 Ω resistor. 5. Connect the collector of the 2SC5200 transistor to the secondary winding of the output transformer. 6. Connect the emitter of the 2SC5200 transistor to the 1 kΩ resistor. 7. Connect the 100 μF capacitor between the collector of the 2SA1943 transistor and the emitter of the 2SC5200 transistor. 8. Connect the 10 μF capacitor between the base of the 2SA1943 transistor and ground. 9. Connect the 0.1 μF capacitor between the collector of the 2SA1943 transistor and ground. 10. Connect the 100 μF capacitor between the positive terminal of the power supply and the collector of the 2SC5200 transistor. 11. Connect the negative terminal of the power supply to ground. ### Testing Once the amplifier circuit is built, it can be tested by applying an input signal to the base of the 2SA1943 transistor. The output signal should be a amplified version of the input signal. The output signal can be measured using an oscilloscope or a multimeter. ### Power Supply The amplifier circuit requires a power supply of +12 V and -12 V. The power supply can be a simple linear power supply or a switching power supply. ### Performance The amplifier circuit can produce a maximum output power of 10 watts into an 8 Ω load. The amplifier circuit has a frequency response of 20 Hz to 20 kHz. The amplifier circuit has a THD of less than 0.1%. ### Applications The amplifier circuit can be used in a variety of applications, such as: * Hi-fi audio amplifiers * Guitar amplifiers * PA systems * Car audio systems ### Conclusion The 2SA1943 and 2SC5200 are a popular combination of NPN and PNP transistors that are often used in audio power amplifiers. This article has discussed the design of a simple power amplifier circuit using these transistors. The circuit is easy to build and can be used in a variety of applications.


Grozzart Images For Free

Grozzart Images For Free


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2sa1943 2sc5200 Buildaudioamps


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