AmplifierCircuits

18W Class-B Audio Amplifier with Tone Controls 18W Class-B Audio Amplifier with Tone Controls General Description for  18W Class-B Audio Amplifier with Tone Controls The particular circuit configuration, allowed to push the NE5534 exceptional capacity of driving the output transistors near to its limits, enabling the whole amplifier to deliver relatively high power outputs without problems. Despite the complication added by the tone controls, the amplifier has an input sensitivity of 130mV RMS, allowing to connect directly to its input the most disparate audio sources without the need for a separate preamplifier. For this reason, it was possible to obtain 18W into an 8 Ohm load using a power supply voltage of +/- 20V. In order to satisfy repeated requests by correspondents, a medium power audio amplifier incorporating tone controls in the feedback path was finally designed.Total Harmonic Distortion figures are astonishingly low, much lower than comparable audio amplifiers u...

Basic / beginners Electronics Tutorial / course / lesson - Voltage, Current, Power, AC and DC --------------------- Click "Show more" ------------------------------- My website and forum:-  http://www.mjlorton.com Donations and contributions:-  http://www.mjlorton.com My techie channel MJLorton - Solar Power and Electronic Measurement Equipment - http://www.youtube.com/MJLorton My Techie Amazon Store:  http://astore.amazon.com/m0711-20 My other channel VBlogMag - For almost any topic under the sun! -  http://www.youtube.com/VBlogMag My VBlogMag Amazon Store:  http://astore.amazon.com/vblogmag-20 ---------------------------------------- ­------------------------------- Nikola Tesla -  http://en.wikipedia.org/wiki/Nikola_T... Thomas Edison -  http://en.wikipedia.org/wiki/Thomas_E... In this tutorial I cover the following: * Some history about electricity / central power stations / electrification.  * Science of electron flow in a c...

Power Amplifier with voltage regulator 4 × 50 Watt TDA8588    The TDA8588 is a multiple voltage regulator combined with four independent audio power amplifiers configured in bridge tied load with diagnostic capability. The output voltages of all regulators except regulators 2 and 3 can be controlled via the I2C-bus. However, regulator 3 can be set to 0 V via the I2C-bus. The output voltage of regulator 2 (microcontroller supply) and the maximum output voltage of regulator 3 (mechanical digital and microcontroller supplies) can both be either 5 V or 3.3 V depending on the type number. The maximum output voltages of both regulators are fixed to avoid any risk of damaging the microcontroller that may occur during a disturbance of the I 2C-bus. The amplifier diagnostic functions give information about output offset, load, or short-circuit. Diagnostic functions are controlled via the I2C-bus. The TDA8588 is protected against short-circuit, over-temperature, open ground and open ...

High Quality, powerful unit: 90W into 4 Ohm load Also suited as guitar or bass amplifier 60W MosFet Audio Amplifier 60W MosFet Audio Amplifier Description To celebrate the hundredth design posted to this website, and to fulfil the requests of many correspondents wanting an amplifier more powerful than the 25W MosFet, a 60 - 90W High Quality power amplifier design is presented here. Circuit topology is about the same of the above mentioned amplifier, but the extremely rugged IRFP240 and IRFP9240 MosFet devices are used as the output pair, and well renowned high voltage Motorola's transistors are employed in the preceding stages. The supply rails voltage was kept prudentially at the rather low value of + and - 40V. For those wishing to experiment, the supply rails voltage could be raised to + and - 50V maximum, allowing the amplifier to approach the 100W into 8 Ohm target: enjoy! A matching, discrete components, Modular Preamplifier design is available here: Modular Audio ...

45 Watt Class B Amplifier Description 4 5W into 8 Ohm - 69W into 4 Ohm Easy to build - No setup required 45 Watt Class B Amplifier 45 Watt Class B Amplifier Description The main design targets for this amplifier were as follows: Output power in the 40 - 70W range Simple circuitry Easy to locate, low cost components Rugged performance No setup These goals were achieved by using a discrete-components op-amp driving a BJT complementary common-emitter output stage into Class B operation. In this way, for small output currents, the output transistors are turned off, and the op-amp provides all of the output current. At higher output currents, the power transistors conduct, and the contribution of the op-amp is limited to approximately 0.7/R11. The quiescent current of the op-amp biases the external transistors, and hence greatly reduces the range of crossover. The idea sprang up from a letter published on Wireless World, December 1982, page 65 written by N. M. Allinson, th...

18W Class-B Audio Amplifier with Tone Controls 18W Class-B Audio Amplifier with Tone Controls In order to satisfy repeated requests by correspondents, a medium power audio amplifier incorporating tone controls in the feedback path was finally designed. To avoid an excessive increase in parts-count, due to the addition of the tone controls, a simple amplifier circuitry was designed on the same guidelines of the successful 45 Watt Class B Amplifier , but using the excellent NE5534 IC instead of a discrete component op-amp to drive the output "dumper" transistors. The particular circuit configuration, allowed to push the NE5534 exceptional capacity of driving the output transistors near to its limits, enabling the whole amplifier to deliver relatively high power outputs without problems. For this reason, it was possible to obtain 18W into an 8 Ohm load using a power supply voltage of +/- 20V. Despite the complication added by the tone controls, the amplifier ha...