Fet amplifier with NPD8301

The excellent characteristics for the track NPD8301 over its range of bias current, thereby improving common mode rejection. ...

Stabilised amplifier schematic

It use the LT1052 and LT1028. Power supply should be double with +-15V 500mA....

10Watt HI-FI Amplifier (TDA2002)

A very small but good quality amplifier circuit that is also fairly cheap. It is based on TDA2002 which offers very low distrortion. Power should be 12-15 volt ...

PC audio amplifier 12Watt

The circuit uses the TDA2030 which is a monolithic integrated circuit in Pentawatt® package, intended for use as a low frequency class AB amplifier. Typicall...

HI-FI Audio Amplifier 60W

This amplifier has a high quality circuit that includes full sort circuit protection and very low T.H.D. at full range of frequency. It needs simmetrical power ...

TDA2050V HiFi amplifier

This circuit uses a high quality audio amplifier IC in a 5-pin TO220 package that does not require insulating washers between the metal tab and heatsink in sing...

40 Watt Hi-Fi amplifier (TDA1514AN-7)

This very high quality audio amp is based on the TDA1514A, a 9-pin flat package IC. The heatsink must be insulated from ground. The amplifier will deliver 40 wa...

2 Watt stereo amplifier with LM1877N-9

This circuit uses a stereo amplifier IC in a 14-pin DIL package that requires very few external components to make a complete 2 Watt per channel power amplifier...

22 Watt power amplifier with TDA2040V

This circuit uses the TDA2040V which is a monolithic power amplifier IC intended for use as a high quality, class AB audio power amplifier. Typically it provide...

5 Watt UHF TV Linear amplifier

This small circuit is a Linear amplifier for driving small UHF TV transmitters. Its gain is 7dB and can amplify a signal between 450-800 MHz. You can drive the ...

4Watt UHF TV linear amplifier

That Circuit is a UHF TV linear amplifier for small TV transmitters with output aroun 100-200mW. The transistor BGQ136 comes with SOT-122 case has gain of 13dB ...

Amplifier input signal overdrive auto-protection

That circuit protects the overdriven signals going into an amplifier. Instead of a zener diode we use a transistor. That way we ensure that the above the ordi...

50W Hi-Fi amplifier with TDA7294

The TDA7294 is a Hi-Fi amplifier and can give 100W RMS but with 10% distortion. Supplying 30 Volts you can have 50 Watts RMS with 1% distortion. Frequency range...

TBA820 Amplifier

A very useful audio amp in an 8-pin DIL package. The IC features a very low minimum working supply voltage of 3V, low quiescent current, good ripple rejection, ...

Low Power Amplifier LM386

A power amp designed for use in low voltage, especially battery-operated, applications. For minimum parts count, C1 and C2 can be omitted. ...

8 Watts Audio Amplifier (TDA2003)

Nice small audio amplifier which use only few parts to give good quality sound. This amp can be used as a simple booster, the heart of a more complicated amplif...

A New Audio Amplifier Circuit Design

The problem with class-B amplifier design is that we start with an output stage in two halves, each with a non-linear response, which we then add together to tr...

Mosfet 75W Power Amplifier

The MOSFETS we are dealing with are three terminal devices which are used to control electron flow in a circuit. Two of the pins (the source and drain) pass the...

Class A 40W into 8 Ohms Amplifier

Both parts of the circuit are biased with the constant current sources as shown, and the signal from the collector of the PNP is followed by the Darlington clas...

80mW Audio Amplifier

This circuit is similar to the one above but uses positive feedback to get a little more amplitude to the speaker. I copied it from a small 5 transistor radio t...