Amplifier Circuits-Audio

TDA1512, TDA1512Q 20WHi-Fi audio power amplifier circuit diagram

Published:2011/8/31 2:36:00 Author:Rebekka | Keyword: 20WHi-Fi , audio power amplifier

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LM2002, LM2002A 8W Audio power amplifier circuit diagram

Published:2011/8/31 2:41:00 Author:Rebekka | Keyword: 8W , Audio power amplifier

LM2002／2002Ais theaudio power amplifier IC. It uses 5-pin single in-line plastic package. The features of the two ICs are large output power, less distortion, low noise, small number of external components, high input impedance, low noise of power shock etc. LM2002 has limiting current and thermal shutdown protection circuit; LM2002A has a high voltage protection. The maximum instantaneous power supply voltage is up to 40V. They are suitable for the audio power amplifier of car audio systems, ordinary portable or desktop recorder. The BTU circuit is shown as the chart.   (View)

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The integrated circuit diagram of two-channel audio power amplifier

Published:2011/9/18 21:16:00 Author:Ecco | Keyword: Two-channel audio , power amplifier , integrated circuit

LA4533M is the two-channel audio power amplifier integrated circuit produced by Sanyo of Japan, and it is widely used in pocket radio, Walkman and other low-voltage, low-power audio system. 1. LA4533M internal block diagram and pin functions LA4533M manifold is mainly composed of two-way power amplifier circuit, power-off mute switch circuit, ripple filter circuit. The manifold internal block diagram is shown in Figure 1, the IC uses 10-pin dual flat plastic structure, and the integrated circuit pin functions and data are listed in Table 1.   (View)

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Fever headphone amplifier circuit diagram 1

Published:2011/9/2 1:18:00 Author:Ecco | Keyword: Fever headphone amplifier

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Fever headphone amplifier circuit diagram 2

Published:2011/9/2 1:17:00 Author:Ecco | Keyword: Fever headphone amplifier

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LM307, μA741 audio amplifier circuit diagram

Published:2011/9/9 1:58:00 Author:Ecco | Keyword: audio amplifier

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power amplifier(STK6153,STK3048) circuit of thick film integrated package

Published:2011/9/15 1:42:00 Author:chopper | Keyword: power amplifier, thick film, integrated package

The picture is a power amplifition circuit of thick film integrated package.Picture (a) shows that input signal is loaded to in-phase end of STK3048 through resistace-capacity coupling circuit(resistance is 33kΩ,capacitance is 4.7μF) and it is added to the base of power tube Q1,Q2 by its output end after it is amplified by thick film power amplifier STK3048.The power amplifier adopts dynatron 2N3055 and MJ2955.R1,R2(0.25Ω) are protective resistors of common emitter. Adjusting potentiometer RP can make power tube in the stage of classA,B,and at this time,the voltage drop of R1,R2 is about 10～13mV,the quiescent current of corresponding Q1 and Q2 is 40～50mA.   (View)

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Frequency Synthesizer Circuit Diagram

Published:2011/9/14 0:26:00 Author:Zoey | Keyword: Frequency, Synthesizer Circuit Diagram

SIM8821XO2 -GOTO is a frequency synthesizer integrated circuit, it is widely used in Samsung's CDMA series cellphones, such as the Samsung A399 mobile phone. 1 Features SIM8821XO2-GOTO integrated circuit contains the first local oscillator, the second local oscillator sampling and filtering circuit, and frequency synthesis data,start, clock circuits,phase detector power supply circuit, as well as some other auxiliary function circuits. 2 Pin Functions Pin functions of SIM8821XO2 -GOTO IC have been listed in Table 1.   (View)

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Lm1875T Hi-Fi 30w audio power amplifier circuit diagram 1

Published:2011/8/19 1:10:00 Author:Jessie | Keyword: Hi-Fi , 30w , audio power amplifier

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Lm1875T Hi-Fi 30w audio power amplifier circuit diagram 2

Published:2011/8/19 0:58:00 Author:Jessie | Keyword: Hi-Fi , 30w audio, power amplifier

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Lm1875T Hi-Fi 30w audio power amplifier circuit diagram 3

Published:2011/8/19 0:59:00 Author:Jessie | Keyword: Hi-Fi , 30w , audio power amplifier

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The step-down converter of MC34063 application circuit

Published:2011/8/13 2:01:00 Author:qqtang | Keyword: step-down converter, application circuit

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LM3886 Subwoofer circuit diagram

Published:2011/8/9 2:24:00 Author:Rebekka | Keyword: Subwoofer

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Voice switching and amplifier schematic diagram

Published:2011/8/11 1:43:00 Author:Ecco | Keyword: Voice switching , amplifier

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2 W x 2 power amplifier(LM1877）circuit

Published:2011/8/8 9:07:00 Author:Fiona | Keyword: 2 W x 2 power amplifier

Shown in the figure,the circuituses on,under symmetrical structure and has two way signal which is added respectively to the two op-amp non-inverting input ends of LM1877,its output end’s external way is same with the input end: it uses 2.7 Ω resistor and 0.1 u F to form the high frequency filter circuit to prevent the high frequency of self-excited; coupling capacitor Co (470 u F) and load resistor ZL (loudspeaker:8Ω) concert the output power into voice to output, and the magnitude of Co and ZL circuit is also determined to the circuit’s lower-cut-off frequency fL,the relationship between this three is: fL=1／(2πZLCo),corresponding to the parameters in the figure,its fL = 42 Hz.   (View)

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50W Hi-Fi Integrated Audio Power Amplifier (TDA1514A) Circuit

Published:2011/7/17 22:09:00 Author:Robert | Keyword: 50W, Hi-Fi, Integrated, Audio, Power Amplifier

The picture shows the audio integrated power amplifier's typical application circuit composed ofTDA1514A. TDA1514A is a 50W Hi-Fi audio amplification IC produced by the Philips company. Its internal protection circuitsare complete, which means it has not only the general over-heating, output short circuit protection, but also the safe operating area protection. The circuit is also set up a silent switch to suppress the starting noise' appearance. In the circuit's design it is also considered the better ripple rejection and low offset with low thermal resistance.   (View)

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Integrated audio amplifier circuit diagram

Published:2011/8/4 1:28:00 Author:Ecco | Keyword: Integrated audio amplifier

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BROADBAND_WITH_GAIN_OF_1350

Published:2009/7/10 1:43:00 Author:May

Metal oxide semkonductor transistors (p-mosts) in Darlington contguration give high input impedance and low output impedance from 5 cps to 72 kc.-F. M. Wanklss, Novel Field-Effect Devke Provides Broadband Gain, Electronics, 36A4, p 30-33.   (View)

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65_watt_AF_power_amplifier_using_an_ECG1078_chip_powered_by_±12_volt_supplies

Published:2009/7/20 4:28:00 Author:Jessie

6.5-watt AF power amplifier using an ECG1078 chip powered by ±12-volt supplies. Frequency response is from 100 hertz to 20 kilohertz (courtesy GTE Sylvania Incorporated).   (View)

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900_MHz_gain_controlled_amplifier

Published:2009/7/23 22:24:00 Author:Jessie

This circuit shows an SL2365 transistor array connected as a gain-controlled amplifier. The transistor-array connections are shown in Fig. 2-35B.The collector load of TR1 is a transformer that is composed of a 14-mm length of 75-Ω stripline resonated with a 1- to 6-pF variable capacitor. The transformer secondary is a small loop of stiff wire that is grounded at one end and located a few mm above the stripline. The noise figure at full gain is 9 dB.   (View)

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