Amplifier Circuit and Method for Compensating an Output Signal Provided at an Output of the Amplifier Circuit
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorRichard HELLBERG
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Abstract
An amplifier circuit for compensating an output signal provided at an output of the amplifier circuit comprises a cascade of sub-amplifiers. Each sub-amplifier of the cascade contributes to a respective part of the output signal. The cascade of sub-amplifiers comprises an end sub-amplifier and at least one preliminary sub-amplifier. At least one error correction block is coupled to apply feedforward error correction to an output of one of the at least one preliminary sub-amplifier.
Claims22
-22. (canceled)
An amplifier circuit for compensating an output signal provided at an output of the amplifier circuit, the amplifier circuit comprising:
- a plurality of sub-amplifiers comprising an end sub-amplifier and at least one preliminary sub-amplifier, wherein:
- the sub-amplifiers are connected in a cascade to provide amplification for respective amplitude ranges of an input signal to the output signal, and
- each sub-amplifier of the cascade contributes to a respective part of the output signal;
- and
- at least one error correction block coupled to apply feedforward error correction to respective outputs of the at least one preliminary sub-amplifier.
A method for compensating an output signal of an amplifier circuit comprising a plurality of sub-amplifiers comprising an end sub-amplifier and at least one preliminary sub-amplifier, wherein the sub-amplifiers are connected in the cascade to provide amplification for respective amplitude ranges of an input signal to the output signal, wherein each sub-amplifier of the cascade contributing to a respective part of the output signal, the method comprising:
- applying feedforward error correction to an output of one of the at least one preliminary sub-amplifiers.
Dependencies are inferred from the claim text.