Please enable JavaScript.
Coggle requires JavaScript to display documents.
LM358 Class A Amplifier analog circuit - Coggle Diagram
LM358 Class A Amplifier analog circuit
Overview
Circuit Type: Class A Amplifier
Purpose: Amplifies an AC input signal with a single power supply
Core Component: LM358 Operational Amplifier
Components
Operational Amplifier (LM358)
Provides voltage gain
Configured as a inverting amplifier
Resistors
R1 (10KΩ)
Input resistor
Limits current to op-amp
R2 (100KΩ)
Feedback resistor
Determines gain
R3 & R4 (200KΩ each)
Voltage divider
Biases the non-inverting input
R5 (1KΩ)
Load resistor
Helps define output impedance
Capacitors
C1 (0.47µF)
Coupling capacitor
Blocks DC component of input signal
C2 (4.7µF)
Output coupling capacitor
Removes DC bias from output
Voltage Source (V3)
Circuit Operation
Signal Flow
AC input enters through C1, blocking DC offset
Voltage divider R3 & R4 sets a reference voltage at non-inverting input
R1 & R2 define closed-loop gain
Amplified signal passes through C2, removing DC bias
Output delivered to load R5
Gain Calculation
Av = -(R2/R1)
Biasing
Uses resistive divider for proper op-amp operation
Power Supply
Single-supply operation
Key Design Considerations
Frequency Response
Determined by capacitor and resistor values
High-pass characteristics due to C1 & C2
Impedance Matching
R5 defines output impedance
Noise Considerations
Proper component selection minimizes distortion