petru-florea / low-frequency-amplifier

Class AB Low Frequency Amplifier PCB design using SMD bipolar junction transistors.

Low Frequency Amplifier

Revision 1.0

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README

Quick summary

This is a BJT based Class AB low frquency amplifier (audio amplifier) PCB design using SMD technology.

This repository contains the OrCad design files, manufacturing Gerber/drill files, PDF/drawing files, and relevant documenation for this board.

Design characteristics

• VCC: 10V; VEE: -10V
• Input signal, ui in the range: ±1 [V]
• Output load, RL: 40 [Ω]
• Input resistance Ri > 0.1 [MΩ]
• Output resistance Ro < 0.8 [Ω]
• Voltage gain, Av: 10
• Operating temperature range: -20 - 120°C
• The presence of supply voltages is signaled by two LEDs

Project folder structure

Starting from the top level:

• Bill_of_Materials - This contains the bill of materials in .xls and .BOM formats
• Data sheets - This contains the data sheets for the electronic devices used
• Layout - This contains the PCB Gerbers and drill file for manufacture, there is also a .jpg image with the PCB layout
• Project docs - This contains the relevant documenation for this project (in Romanian)
• Schematics - This contains the original OrCad schematic and design files. There are two folders inside:
  • Simulation - contains the OrCad schematic used for circuit simulation
  • Transfer PCB - contains the OrCad schematic used for exporting the circuit to the OrCad PCB Editor
• Simulations - This folder contains images of different simulations that prove the circuit is working adequately