12W MOSFET Audio Amplifier 2SK135 / 2SJ50
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Stereo channel controller
The add-on circuit presented here is useful for stereo systems. This circuit has provision for connecting stereo outputs from four different sources/channels as inputs and only one of them is selected/connected to the output at any one time. When power...
Improved 3 Transistor Audio Amp (80 milliwatt) circuit
This circuit is similar to the previous one but employs positive feedback to enhance the amplitude delivered to the speaker. It was adapted from a small five-transistor radio that utilizes a 25-ohm speaker. In the prior circuit, the load resistor...
300w power amplifier circuit with 2n773
This amplifier was designed to utilize the otherwise unused TO3 power transistors that many hobbyists possess. With proper construction, the module can achieve high-quality performance and is rated for 300 watts into a 4-ohm load, depending on the power supply....
60w amplifier mosfet irfp240
The supply voltage rails were conservatively maintained at +40V and -40V. For those interested in experimentation, the supply voltage can be increased to a maximum of +50V and -50V, enabling the amplifier to reach its target output of 100W into...
10 W Audio Amplifier
This circuit is a general-purpose 10-W audio amplifier designed for moderate-power public address (PA) systems or as a modulator in an AM transmitter. By applying higher voltages and adjusting the bias resistors, it is possible to achieve output power levels...
Small class b audio amplifier circuit diagram
When the power supply reaches the circuit and the input signal is applied, the sound signal is processed through capacitor C1 and resistor R1 for signal coupling and noise reduction. The modified signal then reaches pin 3 (non-inverting) of operational...
Low distortion audio gain limiter
The level at which the limiter activates in audio can be adjusted using the LIMIT LEVEL selector knob. When this threshold is surpassed, the output of the half-limiting detector within the op-amp, functioning as a comparator, triggers the LED, leading...
Universal Audio Line Amplifier
A line amplifier is a valuable component for matching line signals or increasing their levels. This functionality is essential during recording sessions or in public-address systems. Additionally, multiple line amplifiers can be combined to create a line mixer. The amplifier's...
audio amplifier ssm2306
The SSM2306 is a fully integrated, high-efficiency, Class-D stereo audio amplifier designed to maximize performance for portable applications. The application circuit requires minimal external components and operates from a single supply voltage ranging from 2.5 V to 5.0 V. It...