By Bob Cordell
Master the artwork of audio energy amplifier design
This finished ebook on audio energy amplifier layout will attract participants of the pro audio engineering group in addition to the hobbyist. Designing Audio energy Amplifiers starts with energy amplifier layout fundamentals amateur can comprehend and strikes all through to in-depth layout strategies for the very subtle audiophile audio energy amplifier fashion designer. this can be the one most sensible resource of information for somebody who desires to layout an audio strength amplifier, even if for enjoyable or revenue. boost and hone your audio layout talents with in-depth insurance of those and different themes:
* fundamentals of audio energy amplifier layout
* MOSFET energy amplifiers and blunder correction
* Static and dynamic crossover distortion demystified
* figuring out unfavourable suggestions and the debate surrounding it
* complex adverse suggestions repayment strategies
* subtle DC servo layout
* Audio measurements and instrumentation
* neglected assets of distortion
* SPICE simulation for audio amplifiers, together with an academic
* SPICE transistor modeling, together with the EKV version for strength MOSFETs
* Thermal layout and using ThermalTrak transistors
* 4 chapters dedicated to category D amplifiers
Supplemental fabric on hand at www.cordellaudio.com includes:
* Ready-to-run amplifier simulations
* Key transistor types
* different bonus materials
Uploader's note: seems to be a retail copy.
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Additional info for Designing Audio Power Amplifiers
6 V at 1 A. 1 Ω in series with the emitter. The actual emitter resistance is not necessarily the physical origin of the increase in Vbe. The voltage drop across the base resistance RB due to base current is often more significant. This voltage drop will be equal to RB(Ic/β). The effective contribution to resistance as seen at the emitter by RB is thus RB/β. The base resistance divided by β is often the dominant source of this behavior. Consider a power transistor operating at Ic = 10 A and having a base resistance of 4 Ω, an operating β of 50, and an emitter resistance of 20 mΩ.
The A-weighted number will usually be 10–20 dB better than the unweighted number. Distortion The most common distortion specification is total harmonic distortion (THD). It will usually be specified at one or two frequencies or over a range of frequencies. It will be typically specified at a given power level with the amplifier driving a specified load impedance. 005% at 100 W into 8 Ω. 02% up to 100 W into 8 Ω. Although 1-kHz THD is at a frequency in the middle of the audible frequency range where hearing sensitivity is high, it is not very difficult to achieve low THD figures at 1 kHz.
Their design requires a somewhat different skill set. Part 6 will introduce you to these new design challenges. 2 The Role of the Power Amplifier The power amplifier in an audio system converts the line-level signal to a large signal that can drive the loudspeaker. The line-level signal is typically on the order of 1 to 3 V RMS at maximum power and is not expected to supply much current to the power amplifier. A typical power amplifier will have an input impedance of greater than 10 kΩ. 5 A RMS at full power with a sine wave.