Differential Amplifier Using Transistors

4000 INR/Piece

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Product Details:

Display Not included (output measured via external equipment)
Power Typically <0.5W (depending on supply voltage and load)
Usage Educational, laboratory demonstration, analog signal amplification
Voltage DC 9V to 15V (dual supply recommended, 9V or 12V)
Product Type Differential Amplifier Educational Kit
Material Phenolic PCB, electronic components (transistors, resistors, capacitors), plastic/metal casing
Design Open frame PCB mount, two input configuration, BJT based
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Differential Amplifier Using Transistors Price And Quantity

Minimum Order Quantity 1 Piece
Price 4000 INR/Piece

Mounting Type PCB, bench top
Bandwidth DC to 1MHz (approx., depends on components used)
Input Impedance Approximately 10k100k (depends on biasing resistors)
Common Mode Rejection Ratio (CMRR) Typically > 60dB (depends on matching of transistor pair)
Transistor Configuration Bipolar Junction Transistors (BJT) NPN pair (e.g., 2N3904, BC547 series)
Number of Channels 2 (differential inputs)
Signal Gain Configurable via resistors, typically 20-200
Demonstration Points Multiple test points for educational measurements
Operating Temperature Range 0C to 50C (ambient, typical classroom/laboratory conditions)
Output Impedance Approximately 1k2k

Differential Amplifier Using Transistors Product Specifications

Detector Not applicable (Analog electronic circuit)
Accuracy High (Depends on matched transistor pair and design)
Power Source DC battery or regulated power supply adapter
Material Phenolic PCB, electronic components (transistors, resistors, capacitors), plastic/metal casing
Weight Approx. 75-120g
Voltage DC 9V to 15V (dual supply recommended, 9V or 12V)
Usage Educational, laboratory demonstration, analog signal amplification
Dimension (L*W*H) Approx. 100mm x 60mm x 35mm (as per image scaling)
Power Typically <0.5W (depending on supply voltage and load)
Design Open frame PCB mount, two input configuration, BJT based
Display Not included (output measured via external equipment)
Product Type Differential Amplifier Educational Kit

Mounting Type PCB, bench top
Bandwidth DC to 1MHz (approx., depends on components used)
Input Impedance Approximately 10k100k (depends on biasing resistors)
Common Mode Rejection Ratio (CMRR) Typically > 60dB (depends on matching of transistor pair)
Transistor Configuration Bipolar Junction Transistors (BJT) NPN pair (e.g., 2N3904, BC547 series)
Number of Channels 2 (differential inputs)
Signal Gain Configurable via resistors, typically 20-200
Demonstration Points Multiple test points for educational measurements
Operating Temperature Range 0C to 50C (ambient, typical classroom/laboratory conditions)
Output Impedance Approximately 1k2k

Differential Amplifier Using Transistors Trade Information

Main Export Market(s) Asia, Africa
Main Domestic Market All India

Product Description

Differential Amplifier Using Transistors

This Trainer has been designed specifically to demonstrate the importance of transistor based amplifiers. This kit is an extremely useful laboratory kit which provides facilities for hands on experience to various experiments in the field of analog electronics and provides all necessary inputs and connections.

Setup Consists of:

1. Two Regulated Power Supplies of 0-5V

2. Circuit Diagram Printed on Front Panel.

Key Features and Construction

Built with high-quality BJTs (NPN type), this amplifier demonstrates fundamental analog signal amplification and differential input concepts. The open-frame, PCB-mountable design features precision biasing components and a robust phenolic PCB, ensuring reliable operation for learning environments. Its two-channel input accommodates versatile signal probing, making it suitable for a range of experiments.

Performance and Educational Benefits

With a configurable gain of 20-200 and superior CMRR (>60dB), this amplifier offers clear demonstration of differential signal processing, common-mode rejection, and practical transistor circuit performance. The wide bandwidth (DC to 1MHz) and multiple test points allow students and educators to observe and measure key voltage and current behaviors directly, deepening their understanding of analog electronics.

FAQ's of Differential Amplifier Using Transistors:

Q: How does a differential amplifier using BJTs work?

A: A differential amplifier built with NPN BJTs amplifies the voltage difference between its two input channels. It does this by using a matched transistor pair, which ensures that signals common to both inputs (common-mode) are largely rejected, while the difference (differential mode) is amplified. This principle is essential in analog signal processing and is well illustrated in laboratory setups.

Q: What factors influence the input and output impedance of this amplifier?

A: The input impedance (typically 10k-100k) is determined primarily by the biasing resistor network and the base-emitter properties of the BJTs. The output impedance (about 1k-2k) depends on the collector resistance and transistor characteristics. Both can be fine-tuned by adjusting component values during assembly.

Q: When is it appropriate to use this differential amplifier?

A: This amplifier is ideally used for education, laboratory demonstrations, and basic analog signal amplification tasks where understanding or measuring common-mode rejection and differential gain is important. It is suited for low- to moderate-frequency analog experiments, typically in classroom or research laboratory environments.

Q: Where should I mount or install the amplifier for best results?

A: For optimal performance and safety, mount the open-frame PCB on a stable bench top or inside a protective enclosure within a classroom or laboratory. Ensure it's away from excessive heat and moisture, and connect it to a regulated 9V or 12V DC supply according to the supplied guidelines.

Q: What is the process of configuring the gain in this amplifier?

A: The gain of the differential amplifier is primarily set by the resistor values in the collector and emitter branches. By selecting appropriate resistor ratios, users can configure the signal gain within the typical 20-200 range, allowing flexible adaptation to a variety of test scenarios or educational demonstrations.

Q: How does the device benefit educational users?

A: With multiple accessible test points, clear demonstration of common-mode rejection, and hands-on analog measurement opportunities, students and educators gain practical experience in circuit analysis, signal amplification, and troubleshooting. It deepens theoretical understanding through direct experimentation with real-world transistor circuits.

Q: What kind of signals and external equipment can be used with this amplifier?

A: The amplifier handles analog low- and mid-frequency signals (up to 1MHz). Output signals can be monitored using external measurement instruments such as oscilloscopes or voltmeters to observe amplified waveforms, DC offsets, and gain characteristics, making it highly versatile for laboratory analysis.

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