Waste energy control and management in power amplifiers
AssigneeEricsson Inc.
InventorsPaul W. Dent, Ross Warren Lampe
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Abstract
A method and a device for increasing the battery life of a battery in a handheld radio transmitter/receiver are disclosed. The disclosed method comprises the steps of rectifying radio-frequency waste energy which is not radiated from an antenna to produce a direct current and directing that current back to the battery of the handheld radio transmitter/receiver. The disclosed device comprises an amplifier for amplifying a transmit signal and sending the transmit signal to an antenna. The disclosed device also comprises an isolator for diverting energy reflected from the antenna and a rectifier for rectifying that diverted energy to produce a direct current which is supplied back to the battery of the handheld radio transmitter/receiver.
Claims3
An efficient transmitter for transmitting a plurality of signals, comprising:
- a direct current power source;
- at least one pair of power amplifiers for receiving power from said direct current power source, wherein a first amplifier in said pair is adapted to amplify a first signal and a second amplifier in said pair is adapted to amplify a second signal, wherein an amplification factor of said first amplifier is at least twice as great as a factor needed to amplify said first signal to a level appropriate for transmission, and wherein an amplification factor of said second amplifier is at least twice as great as a factor needed to amplify said second signal to a level appropriate for transmission;
- a power combining means for combining outputs of said pair of power amplifiers to produce a desired sum signal for transmission and a waste energy signal;
- and
- a rectifier circuit for converting the waste energy signal into a direct current which is fed back to said direct current power source in order to reduce net power consumption of said transmitter.
Dependencies are inferred from the claim text.