Massive Audio PAT 2 Manual de usuario

Amplifier Anatomy - Part 1By: Patrick Quilter, Chief Technical OfficerQSC Audio Products, Inc.Article in Sound & Video Contractor Feb. 20, 1993Wh

amount of feedback that can be used.The only fundamental cure is to reduce the circuit lag by using high-speed components. There hasbeen a lot of prog

SWITCHING AMPLIFIERSRemember those classes D, E and F that we promised we would talk about in Part I? As you haveseen, heat in the output transistors

Fan cooling creates noise in the chassis, but it dramatically reduces the size of the heatsink. Be-cause of the increased power ratings of modern ampl

AMPLIFIER POWERWe all know that the amplifier’s power rating tells us how loud the amplifier will get. A “200W at 8ohm” amplifier is designed to deliv

ume. This ability is called flat frequency response because the graph of amplifier gain vs.frequency is a flat line.If the gain at low frequencies fal

A full-wave bridge rectifier circuit uses four diodes. Each diode passes current only in the directionof the arrow. If you follow the current flow aro

SWITCHING POWER SUPPLIESThe size and weight of power-supply components has been somewhat reduced over the last 20years, but progress has been slow bec

method of cascading is on of the major differences among amplifier designs, and it would doublethe length of this article to fully review these method

move together. Each transistor can, therefore, deliver a faithful replica of the signal all by itself,except for the large idle current.If we were to

there was 60 “unused” volts wasted in the output transistors.In a class G amplifier, we have on set of transistors connected to a lower voltage supply

NEGATIVE FEEDBACK AND DISTORTIONIn Part I, we mentioned that transistors are not inherentlyperfect magnifiers. Most of the advancedcircuit techniques