公开(公告)号：US11228281B2

公开(公告)日：2022-01-18

申请号：US16439713

申请日：2019-06-13

Applicant: MEDIATEK INC.

Inventor： Yu-Hsien Chang ,  Yu-Ming Lai ,  Ching-Chia Cheng ,  Wei-Kai Hong ,  Yi-Chu Chen ,  Tsung-Ming Chen ,  Shih-Chieh Yen

IPC: H03F1/32 ,  H03F1/02 ,  H03F3/193 ,  H03F3/21

Abstract: A calibration apparatus is used for calibrating characteristics of a power amplifier (PA) in a transmitter. The calibration apparatus includes an adaptive bias generator circuit that is used to track an envelope of an input signal received by control terminals of transistors of the PA and generate an adaptive bias voltage to the control terminals of the input transistors in response to the envelope of the input signal.

公开(公告)号：US20200028469A1

公开(公告)日：2020-01-23

申请号：US16439713

申请日：2019-06-13

Applicant: MEDIATEK INC.

Inventor： Yu-Hsien Chang ,  Yu-Ming Lai ,  Ching-Chia Cheng ,  Wei-Kai Hong ,  Yi-Chu Chen ,  Tsung-Ming Chen ,  Shih-Chieh Yen

IPC: H03F1/02 ,  H03F1/32 ,  H03F3/21 ,  H03F3/193

Abstract: A calibration apparatus is used for calibrating characteristics of a power amplifier (PA) in a transmitter. The calibration apparatus includes an adaptive bias generator circuit that is used to track an envelope of an input signal received by control terminals of transistors of the PA and generate an adaptive bias voltage to the control terminals of the input transistors in response to the envelope of the input signal.