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Researchers Claim to have solved Efficiency Problem of Power Amplifiers

hypnosec (2231454) writes | about 2 years ago

Power 2

hypnosec (2231454) writes "Two MIT electrical engineering professors, Joel Dawson and David Perreault, have claimed that they have cracked the age old efficiency problem related to the power amplifier in smartphones by designed a new amplifier that consumes just half the power as compared to their current counterparts. Current transistor based power amplifiers consume power in two modes – standby and output signal mode. The only way to reduce power consumption and increase battery life is to use the least possible power when in standby mode. The problem here is that if the power is kept very low when in standby mode, because of sudden jumps from low-power standby mode to high-power output mode, signals get distorted. This is why current technologies waste a lot of electricity as standby power levels are kept at a relatively higher level to avoid distortion. The new technology, dubbed asymmetric multilevel outphasing, is basically a blazingly fast electronic gearbox that would select the best possible voltage to send across to the transistors that would minimize power consumption."
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Get the phyics right (1)

unitron (5733) | about 2 years ago | (#41871377)

"...the best possible voltage to send across to the transistors..."

One does not send voltage.

Voltage is the electrical "pressure" which "sends" amperage, i.e., current.

Title misleading and content confused (0)

Anonymous Coward | about 2 years ago | (#41873987)

Well hypnosec.
There are far more power amplifier types out there, other than cell phones. Yet this story is about a method for a very narrow application for power saving in cell phones. First you are misleading in this report and It's definitely not an earth shattering breakthrough in power amplifier efficiency. Nothing like getting 100% efficiency out of class A amps etc. Oh and power is watts/ampere, not volts.

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