Hi everyone,
Apart from class-D , the efficiency in Linear amplifiers could be obtained by converting a Class-AB amp into Class-H amp...
I mean to say in simple words "The Rail Switcher Amp" benefits from the elimination of wasted heat incase of class-AB , by splitting the power rails into 2 or 3 TIERS, and choosing the appropriate Rail according to the Voltage Swing at output.....So that the output transistor has less VCE across it to do the job with less wastage...
I have seen many pro-amp manufacturers Quote that Class-H reduces the current consumption from as much as 30% in comparision to same wattage amp in Class-AB, meanwhile, it also states that the heatsinking requirements are much less than class-AB amp.....
But their are many challenges that must be met in order to overcome various obstacles such as Switching noise, Spikes, Seamless Transition from one Tier to another and so on....
Below are the switching waveforms from a pro-amp in Class-H
regards,
K a n w a r
Apart from class-D , the efficiency in Linear amplifiers could be obtained by converting a Class-AB amp into Class-H amp...
I mean to say in simple words "The Rail Switcher Amp" benefits from the elimination of wasted heat incase of class-AB , by splitting the power rails into 2 or 3 TIERS, and choosing the appropriate Rail according to the Voltage Swing at output.....So that the output transistor has less VCE across it to do the job with less wastage...
I have seen many pro-amp manufacturers Quote that Class-H reduces the current consumption from as much as 30% in comparision to same wattage amp in Class-AB, meanwhile, it also states that the heatsinking requirements are much less than class-AB amp.....
But their are many challenges that must be met in order to overcome various obstacles such as Switching noise, Spikes, Seamless Transition from one Tier to another and so on....
Below are the switching waveforms from a pro-amp in Class-H
regards,
K a n w a r