Invention Grant
- Patent Title: Systems and methods for detecting local oscillator leakage and image tone in I/Q mixer based transceivers
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Application No.: US17142058Application Date: 2021-01-05
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Publication No.: US11171609B2Publication Date: 2021-11-09
- Inventor: Hariharan Nagarajan , Ashutosh Verma , Chung Lau , Tienyu Chang
- Applicant: Samsung Electronics Co., Ltd.
- Applicant Address: KR Suwon-si
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Agency: Lewis Roca Rothgerber Christie LLP
- Main IPC: H03D1/04
- IPC: H03D1/04 ; H03D1/06 ; H03D1/18 ; H03D7/14 ; H04B1/403 ; H04B17/10

Abstract:
A detector circuit includes: a squaring circuit configured to receive an output of a power amplifier of a radio transmitter and to produce an output current, the output of the power amplifier including: a desired tone; a local oscillator leakage tone; and an image tone, and the output current of the squaring circuit including: a direct current (DC) component including a function of the desired tone and an alternating current (AC) component; and a DC current absorber electrically connected to an output terminal of the squaring circuit, the DC current absorber being configured to filter out the DC component of the output current of the squaring circuit to produce a filtered output of the squaring circuit, the filtered output including the AC component including functions of the local oscillator leakage tone and the image tone.
Public/Granted literature
Information query
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