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80 Threads found on Power Audio Design
Hi What is the value of the speaker that we have to use for a 81mW output power from a cascaded stage ??
The Mosfets are not biased correctly so the amplifier will produce plenty of crossover distortion. Most audio power amplifiers do not use voltage regulators.
Hi, for your OPAMP you need a dual power supply and try a 2500 Ohms feedback resistor. Klaus
You do not want to use an inefficient linear audio amplifier that uses 800W from the battery to make an output of 500W so that it makes 300W of heat. Instead you want an efficient Pulse-Width-Modulation circuit where it has Mosfets turning completely on and completely off so that little battery power is wasted by making heat. The PWM can be at a hi
you should summing all current output from the power source. BTW, what is your applications of the differential opamp
Your circuit works from a dual-polarity supply so there are no capacitors to charge. I do not see any output capacitors that might not be needed. Your resistor values are very low so the coupling capacitor values are very high and are not even high enough for passing low audio frequencies. If you use 47k for R15 and R16 then the coupling capacitor
...Another thing is to know that iron core is more flux attractive or ferrite core? Selection of core material depends on range of signal frequency. If applied on low frequency ( mains, audio ) the best choice is iron, but above some KHz ( particularly on power switching ) ferrite becomes best suitable. +++
"Advanced Techniques in RF power Amplifier design" by Cripps Also there is a chapter in "RF Microelectronics" end ed. by Razavi
Hai all i want to design a high power smps for audio ampliifier. The output ratings for the smps is +/-45V with 6Amps. I am a new one in in the SMPS area. Before this i was using transformers of heavy duty and it had so much weight. so in want to go with a new one thats why i just came for the smps. i (...)
Hi, I want to do an audio jammer as my final year project. Its objective is to prevent outsider record private conversation in the meeting. But, I dont know how to evaluate it through the experiment. How to jam a recording device using waveform generator. what is the setting of frequency , power , etc need to be set? Thanks for help.
Although the circuit is surely not working, it raises some questions: - How is LM386 different from a regular OP like 741? Which circuits are suitable for it? - What's the working principle of a multiband equalizer? How can we design it with OPs? - What's a reasonable impedance level for audio circuits? Where do we need power amplifiers (...)
1) How much do you expect to make? 2) When can you start? That's a pretty ambiguous question. What kind of hardware? Analog? Digital? Microprocessor? Radar? Embedded? power? audio? Video? Thank You Mr. Barry for giving more clarity in the question. Actually I'm into hardware design mainly of Embedded System
Hi friends, Currently I am designing USB & SPDIF audio DAC. I have some doubt about power supply design. I have attached schematics of the supply. As you can see it is +/-12V symmetrical. It supplies analog and digital parts of the device. Both analog and digital part have their own LDO's and FE beads with PI filter (...)
HI ALL; kindly help me to design a circuit to detect(supervise)the output of audio amplifier. the case is :there is for example 10 speakers concocted to the output of audio amplifier and i need to monitor this line for open circuit or short circuit or amplifier power off . what i need is when the signal is (...)
It is a design of audio amplifier based on well known LM3886 with original effect of ?Magic Eye? on the front panel. Main power supply consists of a 150VA transformer; 2x23V + 6,3V additionally winded, 4x4700uF MKT, bridge 10A
In GSM, the 217Hz is a sensitive issue and happened due to the 4.6 msec TDMA operation of the RF power amplifier. The most important thing to avoid this problem is the layout design of the audio circuits of the mobile, mainly following the old rules of the audio amplifiers PCB design (a lot of (...)
What is the signal type , cable capacitance and load impedance? Is this Analog or Digital? DC or AC? One can design a simple solution ONLY if the problem is well defined. Personally I like using old Car Ignition Coils as audio signal boosters.. Ha ha ha Works well on 20mA You can increase DC voltage for low power using a series of (...)
I need power supply for precision analog design , +12V -12V, about 500mA, In short, something like LM317/337 but in very low noise version. LM317 have RMS noise 0,003% f<=10kHz this is on 12V noise 360uV my design need about -20dB better -30dB less. Is a newer low noise versin LM317? Or recommend design with LM317 and (...)
I am designing an audio amplifier using a microcontroller, lcd. But i have problem designing the amplification section because most the design i know about is analog. Can anyone help U mean u want a power meter ? and display on screen as a number or as a bar graph led screen [COLOR="#FF00
Hi all , i am go to design TMS320C5505 fixed point signal processor board i have the schematic but i don't know how to built stack-up for this schematic which contain linear regulator ,UART, JTAG ,connector USB ,LCD and Ultra Low power Stereo audio Codec are the peripheral . to built stack-up ,depends on pin counting or depends (...)
Your circuit looks like a low power very simple opamp that does not have enough power to drive an 8 ohm resistor in parallel with a 500pF capacitor. Why don't you use an audio power amplifier instead?
The chips are for switching power supply
Hi, You have two things in mind as quoted below: I'm designing an transistorised audio power amplifier with 50 watt output Which IC can be used if avaliable Yes many ICs available for this. Simply Google for the same, you will get 100s of designs even with PCB design Select the most suited to your needs. (...)
Please provide additional details: components to be used for, power supply voltage, output power rating.
"audio power Amplifier design Handbook" 2nd Edition, by Dougles Self has a chapter (12) devoted to this subject. This is the best reference that I have found. . See also . "designing audio power Amplifiers" chapter 15 by by Bob Cordell . "High Performance audio (...)
The amplifier is trivial, just aim for enough power down to subsonic frequencies (very large coupling capacitors). The problem is with the loudspeaker, you just can't cheat on the physics, you need to move a lot of air, so long throw voice coils/large diameter cones and very substantial cabinets both in volume and rigidity. Many so called "bas
It depends on design. In some power IC, when operating frequency is detected to enter audio range, some actions are taken to run out of that frequency range.
Good audio power amplifiers are able to achieve the intended bandwidth, at least after adjusting the frequency compensation. Many examples have been posted a edaboard before. If low distortion isn't an objective, a more simple circuit may be sufficient. Class AB should be preferred in any case. A "coil" can be expected rather as an inductive th
there is TDA7294 class D 100w audio amp u might like to design for your pc :) AND TDA7293 you could use it in pair form or more in parallel to increase power of amp.
BD135 is an audio dedicated transistor. It can give about 5W RF output power at 3MHz, but at 30MHz cannot get more than 100mW output power. You have to chose a different transistor, and recommended topology for a broadband PA in HF is push-pull using balun
Hello All Our company (Electronic Module_FM audio Transmitter_RF power Amplifier_DC/DC Converter_Class D audio Amplifier_Wirless Data Transceiver ) developes advanced electronic modules. Our products can simplify design dramatically. Now there're several product lines: DC/DC converter, RF data transceivers, FM (...)
You can design excellent digital notch filters. Th problem is that they require so much "infrastructure"; A/D converter, a processor, D/A converter and a power supply for these components. If these subsystems are already available, then digital is the way to go. Otherwise, an analog filter makes more sense.
Hello, I am looking to build a SMPS to power an audio IC. I require a stable 50v output voltage from a 12v (10v to 15v really) input. What complicates this, is that I need about 1800W output maximum. Probably closer to 200W-300W on normal occasions, however the design must satisfy the worst possible case. Space is not really a concern, (...)
I want to know voltage and current specification of audio port of motherboard....plz help in this regard.... Actually i want to design power audio amplifier for personal computer....If someone has related document for design steps of audio amplifier...plz upload here.... Thanks in advance
Hi marinara27 ! Look at book "Self - audio power Amplifier design Handbook" on .
what are the main design toplogies of CMOS power amplfier for audio/headphone applicatios ? Thanks in advance.
Hi all I am designing now my audio amplifier my self but need some help and ur idea I have attached my design my idea is as follows the opamp will be used to solve the problem of distortion of the transistors the transistors will delliver power to the horn I can add parallel transistors to npn and pnp so the current (...)
Hi! we have a design which is having BF532 from ANALOG DEVICES, USB, ethernet, audio, video and other peripherals..... i have to design power supply for this board..... i don't have any previous experiance in this regard...i have seen the electrical specs in the datasheets...there are so many new terms are there (...)
Hi All i am preparing for an interview ( 2maro ) . I am aware of power supply design ( but not sure which one is used for MP3 players ) but i am totally new to audio Circuit design . I will appreciate if some one can please re direct me to the links that explain these things Thanks Abishek Mann
If interested go to the site for all the audio requirement including power Amplifiers (from 20W to 1.5KW), Crossover etc etc ENJOY!
Hi, i need these IEEE papers to design my decimation filter in low power, could any one have any any paper will u send it to my mail id, thank in advance 1.J. J. van der Kam, ?A digital ?decimating? filter for analog-to-digital conversion of hi-fi audio signals,? Philips Tech. Rev., vol. 42, pp.
hello,everyone. the sanyo bipolar process CR23 is especilly amied for large current circuit. but spice model (Gummel-Poon model) only provide npn model with emitter area(10.5um*10.5um). i used it to design a class ab audio amplifier with peak output current about 3A. how can i use it to design power (...)
gos1, My favorite is "audio power Amplifier design Handbook" by Douglas Self. Regards, Kral
My old Heathkit AA-1800 power amp (about 500W/ch RMS into 8 ohms) uses good-old-fashioned mechanical relays in the speaker outputs. A small control circuit closes the relays after the +/- 100V rails have stabilized, and quickly opens the relays at power-off or if significant DC offset is detected. It's a DC-coupled design, except for the (...)
Maybe take a look at on audio power Amplifiers book
TechOnline Communities: TechOnline audio designLine Automotive designLine Commsdesign Digital TV designLine DSP designLine EDA designLine eeProductCenter Industrial Control designLine Mobile Handset designLine Planet Analog (...)
whitewiz, I you are interested in an introductory book on power power amplifier design using discrete components (as opposed to IC design), the following book is very good: "audio power Amplifier design Handbook" by Douglas Self The book concentrates mainly on classes A, (...)
hi, all. I am designing a module in audio ADC that can shutdown power when clock freq. is below a certein point, namely 1kHz. Did someone ever design the similar one or just give me some clues, pls. Thanks in advance. Turtleden
switch capacitor or switched power IC ?
Hi to everyone can you pls help me how to design an audio power amplifier?pls

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