Power amplifying apparatus having bias boosting structure with improved linearity
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsKyu Jin CHOI, Jae Hyouck CHOI, Je Hee CHO
Life of this patent
Estimating the term…
Abstract
A power amplifying apparatus includes a first bias circuit configured to generate a first bias current by adding a boost current to a base bias current generated from a reference current, a first amplification circuit configured to receive the first bias current and amplify a signal input through an input terminal of the first amplification unit to output a first amplified signal, and a bias boosting circuit configured to generate the boost current, based on a magnitude of a harmonic component in the amplified signal output from the first amplification circuit.
Claims18
A power amplifying apparatus comprising:
- a first bias circuit configured to generate a first bias current by adding a boost current to a base bias current generated from a reference current;
- a first amplification circuit configured to receive the first bias current and amplify a signal input through an input terminal of the first amplification unit to output a first amplified signal;
- and
- a bias boosting circuit configured to generate the boost current, based on a magnitude of a harmonic component in the amplified signal output from the first amplification circuit.
A power amplifying apparatus comprising:
- a first bias circuit configured to generate a first bias current by adding a boost current to a base bias current generated from a reference current;
- a first amplification circuit configured to receive the first bias current and amplify a signal input through an input terminal of the first amplification unit to output a first amplified signal;
- a second bias circuit configured to generate a second bias current;
- a second amplification circuit configured to receive the second bias current and amplify the first amplified signal received from the first amplification circuit;
- and
- a bias boosting circuit configured to generate the boost current, based on a magnitude of a harmonic component in the amplified signal output from the first amplification circuit and provide the boost current to the first bias circuit.
A power amplifying apparatus comprising:
- a bias circuit configured to generate a first bias current by adding a boost current to a base bias current;
- an amplification circuit configured to receive the first bias current, amplify an input signal, and output an amplified signal;
- a bias boosting circuit comprising
- a harmonic extraction circuit configured to extract a harmonic component from the outputted amplified signal;
- a rectifier circuit configured to rectify the extracted harmonic component;
- a low pass filter configured to generate a direct current (DC) current by low-passing the rectified signal;
- and
- a boost circuit configured to generate the boost current based on a magnitude of the DC current and provide the generated boost signal to the first bias circuit.
Dependencies are inferred from the claim text.