Download Designing Audio Power Amplifiers by Bob Cordell PDF

By Bob Cordell

Master the paintings of audio energy amplifier design

This accomplished e-book on audio energy amplifier layout will entice contributors of the pro audio engineering group in addition to the hobbyist. Designing Audio energy Amplifiers starts with strength amplifier layout fundamentals beginner can comprehend and strikes throughout to in-depth layout ideas for the very refined audiophile audio energy amplifier dressmaker. this is often the only most sensible resource of information for somebody who desires to layout an audio strength amplifier, no matter if for enjoyable or revenue. increase and hone your audio layout abilities with in-depth assurance of those and different themes:

* fundamentals of audio energy amplifier layout
* MOSFET strength amplifiers and blunder correction
* Static and dynamic crossover distortion demystified
* knowing damaging suggestions and the debate surrounding it
* complicated unfavourable suggestions reimbursement thoughts
* refined DC servo layout
* Audio measurements and instrumentation
* neglected resources of distortion
* SPICE simulation for audio amplifiers, together with an educational
* 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 to be had 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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Extra info for Designing Audio Power Amplifiers

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A typical power amplifier will have an input impedance of greater than 10 kΩ. 5 A RMS at full power with a sine wave. Thus, it is the job of the power amplifier to produce both relatively high voltage and high current. A very common range of power amplifier voltage gains is on the order of 20 to 30. 1 Power amplifier driving a load. with a gain of 20 will produce 50 W into an 8-Ω load. Ideally, the power amplifier has very low output impedance so that it essentially acts like a voltage source driving the load.

With greater reverse bias of the junction, the depletion region becomes larger. The spacing of the capacitor plates is then larger, and the capacitance decreases. The junction capacitance is thus a function of the voltage across the junction, decreasing as the reverse bias increases. This behavior is mainly of interest for the collector-base capacitance Ccb, since in normal operation the collector-base junction is reverse biased while the base-emitter junction is forward biased. It will be shown that the effective capacitance of the forwardbiased base-emitter junction is quite high.

Everything else, both distortion harmonics and noise, is measured, giving rise to the THD + N specification. At higher power testing levels, the true THD will often dominate the noise, but at lower power levels the measurement may often reflect the noise rather than the actual THD being measured. Graphs that show rising THD + N at lower power levels can be misleading. The rising level may actually be noise rather than distortion. This is because a fixed noise voltage becomes a larger percentage of the level of the fundamental as the fundamental decreases in amplitude at lower power levels.

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