- Electronics Projects
- 1.5v to 220v AC simple inverter
- Build Simple AM Radio receiver at home
- Simple Uninterruptible Power Supply (UPS) Circuits
- Single Transistor Amplifier Circuit
- 3.7v Lithium Battery Level Indicator
- LED Chaser using transistors
- Electronics Projects for Beginners
- Simple Latch Circuit Using Transistors
- DC to AC Power Converter circuit feature working
- Fire Alarm Circuit using Transistor
- Two Transistor Amplifier
- Laser Security System
- Music Operating Dancing LEDs light
- Volts Booster Circuit Using Ferrite ore transformer
- Touch switch circuit using Transistor
- Two transistor FM transmitter project
- LED Flasher Using Timer IC 555
- DC Voltage Power Supply Using The LM317
- Electronic Mosquito Repellent Circuit
- Light Dimmer Circuit 1000 Watts Using BT139
- Non-Contact Voltage Detector by using transistor
- 4 volts simple inverter project: explanation
- Flashing Police Lights Circuit
- Light Dependent Resistor, its types and applications
- 100 watts inverter circuit working and applications
- Stereo Audio Amplifier 5W Circuit using TEA 2025 IC
- Small High Volts using 2Sc 1815 transistor
- Electronic Doorbell Circuit using a 555 and CD4017
- Touch On Touch Off Switch Circuit Using 555 timer
- LM386 Audio Amplifier Circuit
- IC 4440 Amplifier Circuit
- Neon Lamp Circuits Working and Application
- Low Power Audio Amplifier Using integrated circuit
- Voltage Regulator Circuits using Transistor and Zener Diode
- Water Level Indicator Circuit Using Transistor
- LED Chaser using CD4017 IC
- Motion Sensor Light Switch
- Melody Generator Using IC um66
- Water Level Indicator Using IC
- Led Light to 220v AC
- LiFi Data Transfer System, WiFi vs LiFi
- How to Connect a CAR Battery | Polarity Checker
- Voltage Level Indicator Circuit
- Security Alarm Using PIR Sensor
- Battery Level Indicator Using LM 3914
- Single Transistor FM Transmitter circuit
- Different types of Capacitor
- Light Emitting Diode (LED) Types of LEDs
- Different Types of Relays
- Piezo buzzer features equivalent
- Clap Switch : Circuit and Its Working
- Different Types of diode, working and features
- PC817 Optocoupler Pinout, Equivalent, Features and applications
Two Transistor Amplifier
For most systems single transistor amplifier does not provide sufficient gain or output impedance matching. The solution is only to combine multiple stages of amplification. In this amplifier circuit, we are going to show a simple two-transistor amplifier. In the single-transistor amplifier circuit, we have made a very simple amplifier with one transistor, one resistor, and one capacitor but the amplifier has been designed with two transistors.
We have designed this amplifier by using two transistors including PNP and NPN transistors and we adopted the overall topology of the Sziklai pair.
The two-transistor amplifier provides a reasonably high impedance while providing a low output. It is an ideal amplifier circuit for applications where a higher level of output is required than the single transistor stage.
An amplifier that consists of two transistors is also known as a two-stage amplifier. This type of amplifier circuit has two transistors, connected to a common power supply. The working of RC Coupled Amplifier can be explained by the following diagram.
Advantages of the Two-stage amplifier
The main advantage of this amplifier is its excellent frequency response. Compared to a single transistor amplifier, this combination has the following advantages:
- Higher input-output isolation
- Higher input impedance
- Higher output impedance
- Higher gain or higher bandwidth
- Lower cost
- Easy to understand
The gain remains constant over the audio frequency range which is the way it is most important for speech, music, etc.
The disadvantage of two stage amplifier
- It uses low power it effective load resistance.
- Single-stage and tow stages amplifiers become noisy with age.
- Due to poor impedance matching, power transfer will be low.
- Powerful amplifiers of class are costly and bulky due to the large power supply and heat sink.
Two-stage RC Coupled Amplifier
This circuit diagram of a Two-stage RC Coupled Amplifier with full detail of components. In this diagram, and everything is clear even an inexperienced person can make and understand its working.