Power Amplifier VMOS OTL 10 Watt

circuit VMOS 10 Watt Amplifier
Hello! This the circuit amplifies small-sized.it uses the equipment VMOS , number BD512 and BD522. which be pillar heart of the circuit. By it very the circuit is the character of OTL , make build easy and the price economizes. It is giving watt about 10W when , use force against 8ohm size loudspeakers and use a place turn on the power 33V sizes that the trend about 1.5A yes.

Source: http://www.hqew.net/circuit-diagram/Power-Amplifier-VMOS-OTL-10-Watt_8661.html

Power Amplifier OCL 40W by 2N3055 MJ2955

The 40W Amp OCL 2N3055 MJ2955 is easy to build,and very inexpensive. To use Power Supply 35V -35V 2A. Transistor 2N3055 MJ2955 must be mounted on heatsink. Can be directly connected to CD players, tuners and tape recorders.

This circuit is one that stands out for ages over 40 years, with sound quality that is hard to find compared be other circuits. If you experimental build or ask people who try already built. Will believe that this is not as exaggerated statement more than true.

This power amplifier series circuit, be able to output of up to 40 watt on load 8 ohm, and will provide output capacity of up to 60 watt load 4 ohm.
The circuit design an All complementary all direct coupling (except the input), Making low frequency response of the circuit well.

Circuit 40W Amp OCL 2N3055 MJ2955

The transistor(MPS9632) Q1, Q2 together to as a differential amplifier, By has R10,R4 and C2 together constitute the feed back circuit and defined an all gain ratio of circuit. At emitter circuit has zener diode is connected as maintain a constant voltage 15V.

The transistor Q5 is the part second amplifier circuit, by has C3 is to feedback between pin base and collector, for prevent procreation oscillator way high frequency

Q8,Q9 acting as the driver circuit to drives the power transistor Q10(MJ2955),Q11(2N3055).
For Q6, Q7 acts as the output transistor protection circuit from damage. Because the current flowing through the load too much such as a speaker cable short-circuited, by will acts as short the bias circuit of the output transistor is reduced so that it not works.

Q3 serves limit current, the general bootstrapped circuit that use the RC. for Q4 acts as setting bias level of the output transistor which which be instead Diodes same the normal amplifier circuit. This connection reduces the crossover distortion as well.
VR1 serves as to adjust a bias voltage the idle current to the circuit.

Parts
Q1,Q2,Q3_________MPS9632___Transistors, Bipolar, Si NPN Low-Power Audio Frequency Small Signal Transistors or
Replace Part is BC167, BC171, BC182, BC237, BC547

Q3,Q6,Q9_________MPSA06____NPN general purpose transistor ____
Replace Part : BC 639, 2SD667, 2SD1226, 2SD1616A

Q5,Q7,Q8_________MPSA56____Small Signal General Purpose PNP___
Replace Part : BC 640, 2SB647, 2SB910, 2SB1116A
Q10______________MJ2955
Q9_______________2N3055
ZD1______________15V 0.5W___zener diode
D1,D2_____________1N4148____75V 150mA Diodes
R1,R10,R13,R14_____10K____1/4W Resistor
R2________________7.5K___ 1/4W Resistor
R3________________3.3K___ 1/4W Resistor
R4________________470 OHM__ 1/4W Resistor
R5________________27K_____ 1/4W Resistor
R6,R8_____________1.2K_____ 1/4W Resistor
R7________________150 OHM___ 1/4W Resistor
R9________________680 ohm___ 1/4W Resistor
R11,R12___________100 ohm ___ 1/4W Resistor
R15,R16___________220 ohm ___ 1/4W Resistor
R17,R18___________0.5 ohm ___ 2W Resistor
R19_______________10 ohm ____ 1W Resistor
VR1_______________1K Potentiometer
C1________________10uF 16V___ Electrolytic Capacitors
C2________________47uF 16V___ Electrolytic Capacitors
C3________________680pF 50V_____ Polyester Capacitor
C4________________0.1uF 63V_____ Polyester Capacitor
C5,C6_____________47uF 50V_____ Electrolytic Capacitors
L1 use #24 copper wire on air coil 5mm.

2SA1248=2SA1249=SAB649
2SC3116=2SC3116=2SC3117=2SD669

PCB 40W Amp OCL 2N3055 MJ2955

Customization this circuit.
When this project is done, not to the speaker cable, adjust VR1 at the center. And then power supply to the circuit, to measure at output point as the loud speaker with the ground Should be less than 0V or 0.1V.

Then uses the voltmeter to measure the voltage across R17, as with adjust the VR1 slowly until you read 0.01V Or may be adjusted by measuring the Idle current is about 15-30mA.
And then, connect the speakers, and input single to use work immediately.
More parts information:

PIC16C711 DM9161 STA540 BA4560 74HC393 HA17555 IRF5210 74HC595N 1N5402 PIC16F72 ATMEGA328P-PU SG3524 LM2676 74HCT04

Power Amplifier Guitar Practice

Circuit Guitar Practice Amplifier
This is Guitar Practice Amplifier Circuit. Friends who like to play electricity guitar may like this circuit. Because it has can to amplify electricity guitar by it has circuit tiny size. Use the integrated circuit LM389 perform amplify loudly increasingly. And The VR1-5K perform fine decorate the popularity in the sound. For a loudspeaker should choose that is valuable impedance about 8-32 ohm. From your circuit will think we use low voltage supply and the a little equipment. Then make the sound that go out to not loud many loudspeaker. Make friends someone may can be defeated sir.

 Related links:

LM723 LPC2138 DS2408 BUF634 IRF9640 C8051F120 FT245BM TDA8359J

Power amplifier using transistors

 

Using some power transistors and some other common electronic components, can be designed a high power audio amplifier capable to provide a maximum output power of 90W.
This power amplifier based on transistors is capable of provide an output of 70W on a load of 8 ohms or 90W on a 4 ohms load.
If the component values in parentheses are used can be connected speakers with 4 ohm impedance, in which case the amplifier maximum output power will be around 90 watts.
The input signal is brought to the transistor T1 and the reaction is taken on the basis of T2. Current through deferential stage is kept constant at 1 mA current source through the action of T3. The input signal for T4/T8 transistor is taken from the T1's collector in combination with current source T5 forms a control stage class A for power transistors. Current through control stage is quite small (about 7 mA) as T6 and T9 are Darlington power transistors.
Protection circuit from Fig. 2 must also be changed when using a 4 ohm load. R24 and R28 values are then 3k9, R26 and R28 are 220 ohms, and D5, D6 and R30 are all eliminated.
Rectified voltage for 70 W / 8 ohms version is ± 40 V to be in load, no load, this corresponds to about ± 47 V. At 4 ohms, these values are ± 34, respectively, ± 40 V.
The transformer used must provide for alternative 1A 70 W / 8 ohm (mono) and 2.2 A for version 90 W / 4 ohms.

Circuit Diagram:

Power amplifier 100w vmosfet 1

 One still designing that it uses in the exit transistor of technology V-mosfet. This transistors to us offer a lot of virtues concerning the simple bipolar transistors, as high speeds, thermic stability, low distortion etc. Beyond this circuit use also other useful solutions as use fet as source of current [ Q3 ], trimmer TR1 with which we match the characteristics of differential amplifier of entry Q1-2. Also extensive is the use of sources of current wilson Q7-8 and Q10-11. With trimmer TR2 regulate the bias current of output stage, in the 100 ma. The use of diodes D2 until D5 in combination with the resistances R17-19, they protect the gates of transistors v-fet from exceeds the voltage ? 14V and it creates perforation in very thin layer SiO2, that is used as insulation in the gate. This way of protection is common in all the amplifiers that use these transistors. The total gain of amplifier is 32.6, regulated from the R18, R6 and R8, in the negative feedback. Also is used enough the use of local feedback for stabilisation of operation under all the conditions. Because the transistors v-fet have positive factor of temperature, with result with the increase of temperature is increased also their resistance. This increase has as result the reduction of current that via the transistor, hence also his power. The use of separated supply in the stages of drive and exit, ensures stability and reject of distortion of intermodulation. The initial drawing of is L. Hood and was published by the Wireless Word.

315 Watt Class D Power Amplifier

This audio amplifier based? TAS5261 (bridge digital amplifier) has output power of 315 watts per channel and an efficiency up to 96% is suitable for use in a variety of Sound applications, such as home theater systems.
Reducing the cost and availability of high-bit ADC and digital signal processors have contributed to the emergence of high power amplifiers, D-class, based on pulse-width modulation. Work output transistor stages in a key mode of such amplifiers allows a few, sometimes dozens of times to increase efficiency, thereby reducing heat generation amplifier, its size and cost. Among all the audio amplifier device class D are the most cost-effective, thanks to the use of digital signal processing. It eliminates the possibility of distortion and noise in the pre-amplifier paths, streamlines and simplifies all kinds of linear and nonlinear signal conversion without using mechanical adjustment components, extends the functionality.

Frequency response, Hz	10 … 40 000
Power Output	235 (RLoad = 4 ohms, THD <0.15%)? 315 (RLoad = 4 ohms, THD <10%)? 125 (RLoad = 8 ohms, THD <0.09%)? 220 (RLoad = 6 ohms, THD <10 %)
Load resistance, Ohm	4 … 16
The range of volume, dB	-100 … 17
Nominal input voltage, V	1
Sampling frequency input signal, kHz	96
S / N ratio, dB	-99
Total harmonic distortion noise, dB	-93
Current consumption in standby mode, not more than, mA	10
Nominal input voltage, V	1
Power supply circuit “ 50″ in	(50)
Power supply circuit “ 12″ stabilized,	12

2SK170 Circuit
24C08 Circuit

Inexpensive 20 Watts Power Amplifier

This simple inexpensive 20 watts power amplifier can be constructed using monolitic DArlington transistors for pushpull output stage. Response frequency of this amplifier is flat within 1 dB from 30Hz to 200kHz, harmonic distortion below 0.2%.
For max output Power 20W 8 ohm load amplifier requires only 1.2Vrms. To provide voltage gain for driving the Darlington output, low noise high gain Q1 (2N5961) is needed.Q1 base on (point B) is the tie point for dc and ac feed backas well as the input signal. Input resistence is 10 kohm. The center voltage A is set by adjusting resistor R4.? A bootstrap circuit boosts the collector supply voltage of Q1 (point C) to ensure sufficient drive voltage for Q2. This also provides constant volatage across R7, which acts as a current source and with D1-D3 reduces low signal crossover distortion.
This inexpensive 20 watts Power amplifier need 40 VDC power supply.

Soure: http://www.hqew.net/circuit-diagram/Inexpensive-20-Watts-Power-Amplifier_11959.html

TDA1011 6.5W Power Amplifier   The TDA1011 is a monolithic integrated audio amplifier circuit in a 9-lead single in-line (SIL) plastic package. The device is especially designed for portable radio and recorder applications and delivers up to 4 W in a 4 W load impedance. The device can deliver up to 6 W into 4 W at 16 V loaded supply in mains-fed applications. The maximum permissible supply voltage of 24 V makes this circuit very suitable for d.c. and a.c. apparatus, while the very low applicable supply voltage of 3,6 V permits 6 V applications. Special features are: ? single in-line (SIL) construction for easy mounting ? separated preamplifier and power amplifier ? high output power ? thermal protection ? high input impedance ? low current drain ? limited noise behavior at radio frequencies

22W Power Amplifier with TDA1554 circuit diagram

Powered with main power IC TDA1554,  this circuit works up to 22W. A few externel components required to support the main component. Heatsink on the power IC is a must.

Components:

R1__________39K 1/4 Watt Resistor
C1,C2_______10uf 25V Electrolytic Capacitor
C3__________100uf 25V Electrolytic Capacitor
C4__________47uf 25V Electrolytic Capacitor
C5__________0.1uf 25V Ceramic Capacitor
C6__________2200uf 25V Electrolytic Capacitor
U1__________TDA1554 Two Channel Audio Amp Chip
MISC________Heatsink For U1, Binding Posts (For Output), RCA Jacks (For Input)

The? works best with 4 ohm speakers, but 8 ohm units will do. Thiscircuitdissipates roughly 28 watts of heat, so a good heatsink is necessary. The chip should run cool enough to touch with the proper heatsink installed.
Operated at 12 Volts and at about 5 Amps at full volume. Lower volumes use less current, and therefore produce less heat. Printed circuit board is preferred, but universal solder or perf board will do. Keep lead length short.
Download TDA1554 datasheet

 

Power Amplifier 2000 Watt circuit diagram

This is linear amplifier which need advance knowledge in electronics since the schematic diagram is very complex for hand made circuit.
Download the zipped schematic here