Invention Grant
- Patent Title: DC offset cancellation circuit
- Patent Title (中): DC偏移消除电路
-
Application No.: US14529924Application Date: 2014-10-31
-
Publication No.: US09438214B2Publication Date: 2016-09-06
- Inventor: Ming-Chou Yen
- Applicant: RDC Semiconductor Co., Ltd.
- Applicant Address: TW Hsinchu
- Assignee: RDC SEMICONDUCTOR CO., LTD.
- Current Assignee: RDC SEMICONDUCTOR CO., LTD.
- Current Assignee Address: TW Hsinchu
- Agency: WPAT, PC
- Agent Justin King
- Priority: TW102148782A 20131227
- Main IPC: H03K5/00
- IPC: H03K5/00 ; H03K5/003 ; H03F1/30 ; H03K5/007
Abstract:
A DC offset cancellation circuit is provided. A first DC current and a first sensing current are superposed with each other to generate a first superposed current. A second DC current and a second sensing current are superposed with each other to generate a second superposed current. The first superposed current is converted into a first voltage signal. The second superposed current is converted into a second voltage signal. After the first voltage signal and the second voltage signal are received by a differential amplifier, an output signal is generated. The output signal is processed into a DC value. The DC value is converted into a DC current signal. The superposing unit generates the first DC current and the second DC current according to the DC current signal, so that the first superposed current and the second superposed current have the same DC offset.
Public/Granted literature
- US20150188525A1 DC OFFSET CANCELLATION CIRCUIT Public/Granted day:2015-07-02
Information query
